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PARADIVE UW

@paleoparadive.bsky.social
86 followers 134 following 10 posts

team @IBE_Warszawa focused on the impact of extinction and climate warming on parasite-host interactions and disease in deep time. www.paradivelab.com Avatar by Franz Anthony

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PARADIVE UW @paleoparadive.bsky.social · 01/10/2026
Pawel Olszewski succesfully defended his thesis on Using #molecular #cophylogenetic methods to estimate #extinction risk on ascaridoid #Nematoda @wbuw.bsky.social @ibe-warszawa.bsky.social supervised by @djbirddanerd.bsky.social
Student and supervisor after the Master defence
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PARADIVE UW @paleoparadive.bsky.social · 30/09/2026
🦠 We're hiring a 2-year postdoctoral researcher at the Institute of Evolutionary Biology, University of Warsaw, to join the PARADIVE lab: euraxess.ec.europa.eu/jobs/469223
euraxess.ec.europa.eu
Assistant Professor (post-doc) - Faculty of Biology, University of Warsaw (WB-KG-15/2026)
The position of Assistant Professor in the programme/project/undertaking The impact of mass extinctions on parasite diversity and evolution.
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Kenneth De Baets @djbirddanerd.bsky.social · 29/09/2026
Reassessment of #Miocene putative #coprolites from Poland suggests a biogenic origin and probable #squamate (reptilian) producers: peerj.com/articles/217... @peerj.bsky.social supported by size/morphology, surface striations, hair-like inclusions and associated putative reptile remains #paleobiology
Six Miocene coprolite fossils (A–F) shown alongside modern reptile faeces (G–L) for comparison. The fossils are irregular, flattened, dark-brown masses; specimen C has a distinctive striated surface texture. The modern samples come from an iguana, a Madagascar boa, a boa snake, and a tortoise, appearing as similar brownish, segmented or lumpy droppings. Panels M and N are microscope photos of hair-like structures inside specimen A, each marked with a yellow line showing the thin-section cut. Scale bars: 1 cm for the specimens, 100 µm for the microscope views. See: https://doi.org/10.7717/peerj.21755/fig-2A grid of small vertebrate fossils from Bełchatów, Poland (scale bars 1 mm). Highlighted putative reptile finds: A, a possible reptile tooth crown shown from two sides; B, a crocodile tooth, slender and pointed; G, a rounded osteoderm (bony skin plate) in dorsal and ventral view; and N, a putative squamate bone fragment shown in three orientations. The remaining panels show mammal and amphibian remains: bat and hedgehog teeth, a possible frog bone, rodent incisors, and numerous mole and shrew-like insectivore teeth (Desmanella, Plesiosorex, Talpinae, Plesiodimylinae), plus a lagomorph tooth and a desman molar. Scale bars: 1 mm. 10.7717/peerj.21755/fig-3Thin-section and electron microscope images of probable coprolites from Bełchatów, Poland. A and B show entire thin sections of two coprolites — pale, elongate slices with darker internal material. C and D are optical microscope views of the coprolite matrix; E and F are backscattered electron images of the same, showing scattered pale inclusions in a darker groundmass. G, H, and I are SEM close-ups revealing clusters of siderite and iron oxides/hydroxides — granular, bright mineral aggregates labelled "Sd" and "FeO(OH)" — in the coprolite matrix. https://doi.org/10.7717/peerj.21755/fig-5
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Kenneth De Baets @djbirddanerd.bsky.social · 04/09/2026
#Cephalopod #paleobiology and #evolution: new #insights, rising #problems, and #perspectives: doi.org/10.1017/jpa.... #paleontology #fossils #ammonoids #coleoids #nautiloids #openaccess
doi.org
Cephalopod paleobiology and evolution: new insights, rising problems, and perspectives | Journal of Paleontology | Cambridge Core
Cephalopod paleobiology and evolution: new insights, rising problems, and perspectives
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Kenneth De Baets @djbirddanerd.bsky.social · 04/09/2026
Interpreting Biotic Interactions in the Fossil Record: Evidence and Evolutionary Significance #paleobiology #paleobiology #fossils #ecology #evolution #EarthHistory #biodiversity
doi.org
Interpreting Biotic Interactions in the Fossil Record: Evidence and Evolutionary Significance
Fossil biotic interactions (fBIs) provide a critical but underutilized window into the ecological and evolutionary dynamics of life through time. Unlike modern ecological data, the fossil record captu...
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Kenneth De Baets @djbirddanerd.bsky.social · 20/08/2026
Cieplejsze oceany, mniejsze zwierzęta. Przełom w badaniach nad efektem Liliputa
serwisnaukowy.uw.edu.pl
Cieplejsze oceany, mniejsze zwierzęta. Przełom w badaniach nad efektem Liliputa - Serwis Naukowy UW
Gdy oceany się ogrzewają, niektóre zamieszkujące je organizmy stają się mniejsze. Najnowsze badania pokazują, że ten zapisany w skamieniałościach wzorzec powtarza się od setek milionów lat. Czy powinn...
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Kenneth De Baets @djbirddanerd.bsky.social · 18/08/2026
The timescale of #nematode #evolution reveals late and convergent radiations of #parasitism: dx.doi.org/10.1038/s415... You should be able to access it here: www.researchgate.net/publication/... #Fossils #Evolution #Parasites #Genomics #Nematodes
dx.doi.org
The timescale of nematode evolution reveals late and convergent radiations of parasitism - Nature Ecology & Evolution
Establishing a universal evolutionary timescale of nematodes has been complicated by their patchy fossil record and analytical limitations. Combining genomic data from 156 nematode species with fossil...
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franz @franzanth.bsky.social · 18/08/2026
I recently did a cover illustration that didn't make it, but go read the paper if you're interested! It's really fascinating. #Art #SciArt
dark illustration showing a raven and an otter circling around a glowing circle with a nematode inside
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Philip Donoghue @phil-donoghue.bsky.social · 17/07/2026
Our latest: The timescale of nematode evolution reveals late and convergent radiations of parasitism. Led by Liang Lü, with help from @djbirddanerd.bsky.social Mattia Giacomelli @meleonora-rossi.bsky.social Oleksandr Holovachov, Davide Pisani and myself www.nature.com/articles/s41...
nature.com
The timescale of nematode evolution reveals late and convergent radiations of parasitism - Nature Ecology & Evolution
Establishing a universal evolutionary timescale of nematodes has been complicated by their patchy fossil record and analytical limitations. Combining genomic data from 156 nematode species with fossil...
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Kenneth De Baets @djbirddanerd.bsky.social · 25/06/2026
🧵 NEW DISCOVERY: Two new types of #tapeworm eggs found in a #Permian shark #coprolite from Brazil! This record pushes back the fossil record of complex parasite life cycles and is a crucial aspect of understanding host-symbiont #coevolution. #Paleontology #Parasites dx.doi.org/10.4202/app.01294.2025
dx.doi.org
Multiple records of tapeworm eggs from Permian coprolites and their palaeoparasitological significance - Acta Palaeontologica Polonica
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Kenneth De Baets @djbirddanerd.bsky.social · 25/06/2026
#Multiple records of #tapeworm eggs from #Permian #coprolites and their palaeoparasitological significance: dx.doi.org/10.4202/app.01294.2025 #Platyhelminthes, #Cestoda, #bromalite, #palaeoparasitology, Rio do Rasto Formation, #Permian, #Paraná Basin #Paleobiology #Fossils
Close-up of spherical inclusions type A1 in PV 634-P thin section. Shark coprolite from Coproland, Brazil, Rio do Rasto Formation, Guadalupian (middle Permian). Panel A: Cluster of subspherical bodies interpreted as tapeworm eggs within a cocoon. Panel B: Single spherical body showing three pairs of hook-like structures and a distinct outer shell surrounded by others. Includes petrographic microscope photos and interpretative drawings. More information in Dentzien-Dias et al. 2026,
Acta Palaeontologica Polonica 71 (2), 2026: 323-335 doi:10.4202/app.01294.2025Close-up of spherical inclusions type A2 in PV 634-P thin section, shark coprolite from Coproland, Brazil, Rio do Rasto Formation, Guadalupian (middle Permian). Shows isolated spherical bodies interpreted as tapeworm eggs. Includes Keyence HX-7000 photo and interpretative drawing. More information in Dentzien-Dias et al. 2026, Acta Palaeontologica Polonica 71 (2), 2026: 323-335 doi:10.4202/app.01294.2025Hypothetical reconstruction of tapeworm parasite life cycles from shark coprolites, Coproland, Brazil, Rio Do Rasto Formation, Guadalupian (middle Permian). Filled arrows show direct evidence, stippled arrows indicate less certain connections, and possibilities from circumstantial inference are discussed in text. Panels: A) Conchostracan as possible first intermediate host; B) Bony fish as second or first intermediate host; C) Tapeworm egg development in host muscle tissue; D) Shark with spiral intestine as definitive host; E) Defecation; F) Tapeworm eggs in faeces preserved as mineralized coprolites. More information in Dentzien-Dias et al. 2026, Acta Palaeontologica Polonica 71 (2), 2026: 323-335 doi:10.4202/app.01294.2025
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Kenneth De Baets @djbirddanerd.bsky.social · 23/06/2026
Unique fingerprint of marine ectotherm body size change during hyperthermal crises: doi.org/10.1073/pnas... #Lilliputeffect | #extinction | #hyperthermal | #climatechange | #bodysize
doi.org
Unique fingerprint of marine ectotherm body size change during hyperthermal crises | PNAS
The term “Lilliput Effect” describes a substantial decrease in the average body size of fossil assemblages during major environmental perturbations...
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Kenneth De Baets @djbirddanerd.bsky.social · 22/06/2026
🌀 Beyond preservation: morphological analysis of Lower #Jurassic serpenticone #ammonoids The family serves as a crucial model for studying serpenticone morphology across various taxa. 📄 DOI: doi.org/10.18261/let... #Paleontology #Ammonoids #Stratigraphy #Paleobiology #Geology #Mesozoic
doi.org
Beyond preservation: morphological analysis of Lower Jurassic serpenticone ammonoids
The Lower Jurassic family Echioceratidae comprises ammonoids crucial for upper Sinemurian biostratigraphy and is a good model for studying the serpenticone morphology present in a wide variety of grou...
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Kenneth De Baets @djbirddanerd.bsky.social · 17/06/2026
Acrothoracican bioerosion as evidence of Early Cretaceous barnacles (Cirripedia) in northwestern Gondwana @peerj.bsky.social peerj.com/articles/21433 #MarineBiology #Paleontology
Shell of the gryphaeid Ceratostreon boussingaulti.
(A) Left valve in ventral view. (B) Left valve in anterior view. (C) Right valve and umbo in dorsal view. (D, E) Close-up views of the borings of UR-CP-0585 cf. Rogerella. (E, F) Color maps of the borings of UR-CP-0585 cf. Rogerella showing the depth of the chambers. Abbreviations: H, high; L, low. Scale bar applies for (A)–(C).Details and 3D volume reconstruction of UR-CP-0585 cf. Rogerella borings.
(A) Three-dimensional model of the shell of the gryphaeid Ceratostreon boussingaulti in ventral view, red rectangle indicates the area with the highest concentration of borings. (B, C) Close-up of the borings showing their overlap, close proximity, and the largest boring observed. (D, E) Micro-CT internal view and volume reconstruction of the chambers of cf. Rogerella (MorphoSource Media 000790704) with institutional catalog number UR-CP-0585 (F) Micro-CT reconstruction of the largest of the borings of UR-CP-0585 cf. Rogerella in apertural view. (G) Micro-CT reconstruction of the largest of the borings of UR-CP-0585 cf. Rogerella in transverse view. (H, I) Close-up of the borings of UR-CP-0585 cf. Rogerella indicating the numbering of at least 26 borings for which the length and width of the aperture were measured. Abbreviations: D, depth; L, length; W, width. Scale bar 2 cm applies to (H) and (I).
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Kenneth De Baets @djbirddanerd.bsky.social · 03/06/2026
A new genus of #giant #salamander (Urodela, Cryptobranchidae) from the #Pliocene of #Japan - peerj.com/articles/213... @peerj.bsky.social #Paleontology #Taxonomy #Zoology #Fossils #Herpetology
Holotype fossil specimen LBM0142000335 of the newly described species Limnospondylus ajimuensis, shown in five anatomical views.

The image displays a vertebral fossil in dorsal (top-down), lateral (side), ventral (bottom), anterior (front), and posterior (back) views. Panel F provides a close-up of the zygapophyseal articular surface alongside an interpretative line drawing. Panel G shows CT scan cross-sections from anterior and posterior sections.

Red arrows highlight three diagnostic features: (1) strongly laterally elongated prezygapophyses, (2) broadly expanded and robust prezygapophysis bases, and (3) nearly straight alignment of the left and right transverse process ventral margins. The lateral view image is horizontally flipped to display opposite-side morphology. Scale bar indicates 2 cm.

Abbreviations used: ac (anterior canal), aco (anterior cotyle), cf (central foramen), fap (facies articularis prezygapophysialis), na (neural arch), nc (neural canal), pco (posterior cotyle), psz (postzygapophysis), prz (prezygapophysis), tp (transverse process), zgr (zygapophyseal growth rings). https://doi.org/10.7717/peerj.21362/fig-2Scatter plots displaying Principal Component 1 (PC1) and Principal Component 2 (PC2) scores derived from a geometric morphometric analysis of trunk vertebrae.

Panel (A) shows the analysis based on the left lateral view of the vertebrae, while Panel (B) displays results from the dorsal half view. The plot distinguishes three groups using specific markers: a red star represents the Ajimu specimen (Limnospondylus ajimuensis), circles represent the extant species Andrias japonicus, and triangles represent Cryptobranchus alleganiensis. The distribution of these points illustrates the morphological variation and clustering among the fossil and modern salamander taxa. https://doi.org/10.7717/peerj.21362/fig-5Graph comparing the ratio of centrum length to centrum height across living and extinct cryptobranchid salamander species.

The chart plots CL/CH ratios for both extant (currently living) and fossil specimens of the cryptobranchid salamander family, allowing comparison of vertebral proportions between modern and ancient species.                     https://doi.org/10.7717/peerj.21362/fig-4
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PARADIVE UW @paleoparadive.bsky.social · 14/04/2026
doi.org/10.7717/peer...
doi.org
Body reconstruction and size estimation of plesiosaurs
Background Plesiosaurs were a clade of Mesozoic aquatic reptiles exhibiting high diversity in neck length. Although their body sizes have long attracted scientific and public attention, mass estimates...
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Dr. Or M. Bialik |📚|🔬|🌊|⚒️ @obialik.bsky.social · 27/03/2026
So we found a weird mold in the Chornobyl Exclusion Zone that seems to be doing something like photosynthesis with ionizing radiation (pos. using melanin). So the natural next stage in trying to understand it - is to send it to space! 🧪 Link: www.frontiersin.org/journals/mic...
Cladosporium sphaerospermum. Macro-and micromorphological characters. A-D. Colony surface grown on PDA (A), OA (B), MEA (C) and MEA plus 5 % NaCl (D) of strains incubated for 14 d at 25 ºC in darkness. E-F. Habit of conidiophores. G-I. Ramoconidia and conidia. E-I. All from 7-d-old SNA slide cultures. A, C-D, F-H, from CBS 193.54 (ex-neotype strain); B, from EXF-738; E, EXF-455; I, EXF-458. Scale bars A-D = 10 mm; E = 100 µm; F = 50 µm; G-I = 10 µm.

Source: https://www.ingentaconnect.com/content/wfbi/sim/2007/00000058/00000001/art00009;jsessionid=ukvexe675r98.x-ic-live-02
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Kenneth De Baets @djbirddanerd.bsky.social · 25/03/2026
A new #Triassic austrolimulid from #Poland presents insight into xiphosurid evolution and palaeobiogeography at the dawn of the Mesozoic led by @jaudycki.bsky.social and with @grzegorzniedz.bsky.social: peerj.com/articles/209... @peerj.bsky.social #paleobiology #evolution
Idealized reconstruction of Polonolimulus zaleziankensis gen. et sp. nov.
Reconstruction credit: Jonatan Audycki. https://doi.org/10.7717/peerj.20950/fig-11Palaeobiogeography of Triassic horseshoe crabs.
Palaeogeography of the world is reconstructed at 245 Ma (Anisian, Middle Triassic) and displayed using Mollweide projection, with a close-up of the Central European Basin System. The extents of shallow seas (light blue), landmasses (pale yellow) and mountain ranges (orange) are reconstructed based on Cao et al. (2017). Symbols represent Triassic localities that have yielded horseshoe crab fossils, their ages, and taxonomic assignment. The palaecoordinates of the xiphosurid localities are also reconstructed at 245 Ma for consistency. Simplified reconstructions of austrolimulids are displayed for context and comparison: 1–Polonolimulus zaleziankensis from the Lower Triassic (uppermost Induan/lowermost Olenekian) Zalezianka-Gózd locality, Poland; 2–Psammolimulus gottingensis from the Lower Triassic (Olenekian) Solling Formation, Germany; 3–Batracholimulus fuchsbergensis from the Upper Triassic (Norian/Rhaetian boundary) Exter Formation, Germany; 4–Attenborolimulus superspinosus from the Lower Triassic (upper Olenekian) Petropavlovka Formation, Russia; 5–Vaderlimulus tricki from the Lower Triassic (lower Spathian, Olenekian) Thaynes Group, USA; 6–Austrolimulus fletcheri from the Middle Triassic (lower Anisian) Beacon Hill Quarry, Hawkesbury Sandstone, Australia; 7–Dubbolimulus peetae from the Middle Triassic (lower Anisian) Ballimore Formation, Australia; 8–Tasmaniolimulus patersoni from the Lower Triassic (lower Induan) Jackey Shale, Tasmania (Australia). Since the investigated xiphosurid localities differ stratigraphically, their geographical position relative to continental boundaries and shallow seashores are approximated. The display window on the map showing close-up boundaries is not square due to employed map projection. For the full list of investigated localities along with their current and reconstructed palaeocoordinates and temporal data. https://doi.org/10.7717/peerj.20950/fig-10 PCA plot of the Triassic horseshoe crabs using prosomal data only.
TPS grids show deformation between the average and the minimum and maximum landmark coordinates for PC1 and PC2. Convex hulls for Austrolimulidae (red) and Limulidae (light blue) are plotted in two alternative ways: solid lines for the inclusion of Limulitella is in Limulidae, and dashed lines if Limulitella is included within Austrolimulidae. Outlines of the specimens used in the analysis are shown above the plot: 1–AM F38274 Austrolimulus fletcheri, 2–gz4142 (latex peel of the holotype Muz. PGI 1808.II.10) Polonolimulus zaleziankensis, 3–UCM 140.25 Vaderlimulus tricki, 4–MMF 27693 Dubbolimulus peetae, 5–GZG.INV.45730a Psammolimulus gottingensis, 6–PIN 5640/220 Attenborolimulus superspinosus, 7–UNISTRA.2015.0.50968 Limulitella bronni, 8–LIM 68 L. bronni, 9–ZPAL V.46/101 Limulitella tejraensis, 10–PMSL T-993 Sloveniolimulus rudkini, 11–MGSB M 262 Tarracolimulus rieki, 12–MGSB 19195 Heterolimulus gadeai.: 13–MAN 8240 Keuperlimulus vicensis, 14–ZPAL V.46/120 Limulitella tejraensis, 15–MB.A.0207 Limulidae indet. (‘Limulus kieri’), 16–ZPAL V.46/106 L. tejraensis, 17–SNSB-BSPG 1967 XVI 27 Limulitella cf. liasokeuperinus, 18–ZPAL V.46/103p L. tejraensis , 19–UTGD 123979 Tasmaniolimulus patersoni. Outlines are not to scale. https://doi.org/10.7717/peerj.20950/fig-9
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Gwen Pearson @bug-gwen.bsky.social · 26/03/2026
Yes, seals have lice! Under water, lice close their spiracles and reduce their oxygen consumption to a minimum www.nature.com/articles/s42...
nature.com
Host-parasite coevolution leads to underwater respiratory adaptations in extreme diving insects, seal lice (Lepidophthirus macrorhini) - Communications Biology
Seal lice survive deep-sea dives by closing spiracles, reducing oxygen use, and breathing through their skin. Genomic data suggest they store oxygen via haemoglobin, showing insects can adapt to extre...
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Biodiversity Heritage Library @biodivlibrary.bsky.social · 27/02/2026
🎉 Huge news for BHL: The Field Museum is taking over the hosting of BHL’s website, servers & infrastructure, ensuring long-term stability and access for its 63+ million pages of open biodiversity literature. Learn more: blog.biodiversitylibrary.org/2026/02/tran... #BHLTransition #ILoveBHL 🌍 📚 🧪
An historic black and white illustration of a paper nautilus floating on the ocean. There are boats, a city and hills in the background.
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Joseph W. Brown @josephwb.bsky.social · 28/02/2026
Limitations of molecular dating using constant birth-death rate priors in deep time reflected in Brachiopoda evolution www.sciencedirect.com/science/arti...
sciencedirect.com
Limitations of molecular dating using constant birth–death rate priors in deep time reflected in Brachiopoda evolution
Molecular dating often struggles to align with fossil records when divergence times are estimated in deep evolutionary history, particularly during th…
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Kenneth De Baets @djbirddanerd.bsky.social · 03/03/2026
Differences in #extinction selectivity and their relationship to functional traits in late #Cenozoic #mollusks peerj.com/articles/207... @peerj.bsky.social #Paleontology #Evolution #Conservation
peerj.com
Differences in extinction selectivity and their relationship to functional traits in late Cenozoic mollusks
Identifying generalizable patterns of extinction selectivity is crucial for understanding the mechanisms driving extinction processes. Differences in the trait composition of extinct surviving species...
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Alexander Lees @alexanderlees.bsky.social · 17/02/2026
Periodic reminder that moa de-extinction could lead to net biodiversity loss due to conservation deprioritisation of extant species. The (re)introduction process of any resultant genetically-modified Emus will very expensive www.nature.com/articles/s41... #Ornithology
nature.com
Spending limited resources on de-extinction could lead to net biodiversity loss - Nature Ecology & Evolution
Use of public funding for conservation of resurrected species would lead to fewer extant species that could be conserved, and consequent net biodiversity loss.
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Kenneth De Baets @djbirddanerd.bsky.social · 17/02/2026
Digesting an ancient ecosystem: #coprolites from the Grippia #bonebed, Lower #Triassic, Svalbard peerj.com/articles/207... @peerj.bsky.social #paleobiology #paleontology #fossils doi.org/10.7717/peer...
Photographs (A–C) and CT-scans (D–G) of morphotype E.
(A) The complete specimen with x-y being cross section in picture F. (B–C) Orthoceratoid cephalopod shell fragment seen in two different angles. Red arrows pointing to the same spot in both pictures. (B) Shell fragment seen from the top. (C) Shell fragment seen in cross section. (D–E) Orthoceratoid shell fragment with a length of 15.8 mm and visible chambers. (D) Outside of the shell fragment. (E) Underside of the shell fragment. (F) Orthoslice of onychites marked x-y in picture A. (G) Bone fragment. (A–F) PMO 250.281. (G) PMO 250.904. https://doi.org/10.7717/peerj.20746/fig-7
CT-scans (A, D, G–I) and thin sections (B–C, E–F) of morphotype A.
(A1–A2) External and internal view of sub-morphotype A, PMO 250.270. (B) Tetrapod bone in thin section, PMO 250.004. (C) Fish vertebrae, PMO 250.009. (D1–D2) External and internal view of sub-morphotype A2, PMO 150.275. (E) Fish scale, PMO 249.999. (F) Degraded bone fragments, PMO 250.000. (G1–G2) External and internal view of sub-morphotype A3, PMO 250.273. (H) Burrows with a width of approximately 0.5 mm over a total area of three mm, PMO 250.530. (I) Conodont element measuring 1.22 mm in length, PMO 250.273. https://doi.org/10.7717/peerj.20746/fig-3
Photographs of the different morphotypes found in the Grippia bonebed, Svalbard.
(A–B) morphotype A1 cigar. (C–E) morphotype A2 amphipolar. (F–G) morphotype A3 cylindrical with grooves. (H–J) morphotype B1 spiral rounded. (K–L) morphotype B2 teardrop. (M–N) morphotype C sub-rounded. (O-P) morphotype D reniform. (Q–S) morphotype E wide cylindrical.(A) PMO 250.847. (B) PMO 250.846. (C) PMO 250.275. (D) PMO 250.854. (E) PMO 250.858. (F) PMO 250.860. (G) PMO 250.530. (H) PMO 250.533. (I’-I”) PMO 250.864. (J) PMO 250.841. (K) PMO 250.869. (L) PMO 250.868. (M) PMO 250.271. (N) PMO 250.884. (O) PMO 250.886. (P) PMO 250.528. (Q) PMO 250.899. (R) PMO 250.897. (S) PMO 250.281. https://doi.org/10.7717/peerj.20746/fig-2
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Hassan Salem @hassansalem.bsky.social · 16/02/2026
How specific are heritable symbioses? And what can we learn from swapping obligate symbionts across host species? We address this in our latest, led by @inespons.bsky.social & in our collaboration w/ @microbiome.bsky.social 🦠🪲 Out today in @natcomms.nature.com! 1/n www.nature.com/articles/s41...
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Institute of Evolutionary Biology UW @ibe-warszawa.bsky.social · 13/02/2026
Congratulations @djbirddanerd.bsky.social and colleagues on your latest publication! 🥳
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Dr. Bethany Allen @bethanyjallen.bsky.social · 11/02/2026
What do we want? Fossil databases! 🐚🦕 When do we want them? Forever! 🗓️ Nice new paper highlighting how academic funding systems and digital architecture need to change, to ensure we can protect and sustain our precious fossil data 📚 www.nature.com/articles/s41...
nature.com
The billion-dollar case for sustaining palaeontology’s digital databases - Nature Ecology & Evolution
The authors survey community palaeontological databases, documenting their contributions to science as well as their vulnerabilities, and provide recommendations for the future of open science databas...
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Emma Dunne @emmadnn.bsky.social · 11/02/2026
🚨 Hot off the press: Our look into of the palaeontological database landscape and its sustainability into the future. Palaeo databases are invaluable and continue to transform our research field - but they are vulnerable... (1/6) 🧪 ⛏️ www.nature.com/articles/s41...
nature.com
The billion-dollar case for sustaining palaeontology’s digital databases - Nature Ecology & Evolution
The authors survey community palaeontological databases, documenting their contributions to science as well as their vulnerabilities, and provide recommendations for the future of open science databas...
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Kenneth De Baets @djbirddanerd.bsky.social · 12/01/2026
This is a really nice paper. I am just confused by statements that ammonoids were affected by and incumbents of the LOME. Ammonoids only originated in the Devonian (even when including their bactritoid ancestors) and not present in Ordovician: doi.org/10.1127/pala... doi.org/10.1007/s133...
doi.org
Emsian Ammonoidea and the age of the Hunsrück Slate (Rhenish Mountains, Western Germany) - Palaeontographica Abteilung A Band 299 Lieferung 1-6 — Schweizerbart science publishers
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ciclasoman.bsky.social @ciclasoman.bsky.social · 10/12/2025
Just a reminder, wild places and wildlife are fragile. Paretroplus dambabe unknown to most people is extinct in it’s native home of Madagascar
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Kenneth De Baets @djbirddanerd.bsky.social · 16/10/2025
🪱🦪 New Fossil evidence from Morocco’s Fezouata Shale show spionid-like worms boring into Babinka bivalve shells — direct evidence of Early Ordovician parasitism, pushing back their origin by >60 million years! #Paleozoic #Paleontology #FossilFriday doi.org/10.1016/j.is...
sciencedirect.com
A 480 million year old parasitic spionid annelid
The Paleozoic fossil record provides unique insights into the evolution of life history traits through the direct preservation of interspecific intera…
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Kenneth De Baets @djbirddanerd.bsky.social · 17/10/2025
Lin & O’Dea show #Remarkable #dominance of #myctophid #otoliths in Upper #Miocene Chagres Formation, #Caribbean #Panama: doi.org/10.7717/peer... #Biodiversity suggests pre-Isthmus #upwelling with efficient transfer from high #PrimaryProduction to predators shaping Ecosystem. #Paleontology #Taxonomy
Reconstruction of Late Miocene mesopelagic fish-dominated ecosystem in Caribbean Panama. The illustration highlights key taxa, including lanternfish, hatchetfish, billfish, Isistius sharks, Otodus megalodon, Isthminia panamensis, and Lepidochelys sea turtle. Artwork by Yun-Kae Kiang. https://doi.org/10.7717/peerj.20155/fig-18Otoliths of Diaphus (Myctophidae) from the Upper Miocene Chagres Formation, Caribbean Panama. (A–C) Diaphus aequalis Schwarzhans & Aguliera, 2013, ASIZF 0100963–0965. (D–F) Diaphus apalus Schwarzhans & Aguliera, 2013, ASIZF 0100966–0968. (G–K) Diaphus barrigonensis Schwarzhans & Aguliera, 2013, ASIZF 0100969–0973. (L–O) Diaphus dumerilii (Bleeker, 1856), ASIZF 0100974–0977. Images are inner views. Scale bar = one mm.
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Kenneth De Baets @djbirddanerd.bsky.social · 16/10/2025
Who is and who is not a paleontologist? #Paleontology #Paleobiology #Fossils
youtu.be
I am paleontologist. Who is a paleontologist? Who is not a paleontologist?
YouTube video by djbirddanerd
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Kenneth De Baets @djbirddanerd.bsky.social · 01/10/2025
10 years ago, our co-edited Topics in Geobiology volumes on #Ammonoid #Paleobiology came out: From anatomy to ecology: doi.org/10.1007/978-... From macroevolution to paleogeography: doi.org/10.1007/978-... In the last months of 2025, i will explore new discoveries on these topics in a thread:
doi.org
Ammonoid Paleobiology: From anatomy to ecology
This two-volume work is a testament to the abiding interest and human fascination with ammonites. We offer a new model to explain the morphogenesis of septa and the shell, we explore their habitats by the content of stable isotopes in their shells, we discuss the origin and later evolution of this important clade, and we deliver hypotheses on its demise. The Ammonoidea produced a great number of species that can be used in biostratigraphy and possibly, this is the macrofossil group, which has been used the most for that purpose. Nevertheless, many aspects of their anatomy, mode of life, development or paleobiogeographic distribution are still poorly known. Themes treated are biostratigraphy, paleoecology, paleoenvironment, paleobiogeography, evolution, phylogeny, and ontogeny. Advances such as an explosion of new information about ammonites, new technologies such as isotopic analysis, tomography and virtual paleontology in general, as well as continuous discovery of newfossil finds have given us the opportunity to present a comprehensive and timely "state of the art" compilation. Moreover, it also points the way for future studies to further enhance our understanding of this endlessly fascinating group of organisms.
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Kenneth De Baets @djbirddanerd.bsky.social · 26/09/2025
Just in time for #FossilFriday 🦖 What are the big questions in #paleontology today? dx.doi.org/10.1017/pab.2025.10042 Nearly 200 scientists worldwide came together to map where our field is headed. Here’s the story 👇
dx.doi.org
Identifying the Big Questions in paleontology: a community-driven project | Paleobiology | Cambridge Core
Identifying the Big Questions in paleontology: a community-driven project
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EcoEvoRxiv @ecoevorxiv.bsky.social · 13/09/2025
Fossils for Future: the billion-dollar case for paleontology’s digital infrastructure DOI: doi.org/10.32942/X2D...
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Dr. Bethany Allen @bethanyjallen.bsky.social · 04/09/2025
Huge thanks to @palaeopercs.bsky.social for inviting and hosting me! If you missed my talk on Tuesday, you can now catch up via their YouTube channel 👇 www.youtube.com/watch?v=x19X...
youtube.com
Bethany Allen - How can we quantify biodiversity in deep time?
YouTube video by Pal(a)eoPERCS
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Ocean Hoptimism @oceanhoptimism.org · 03/09/2025
Evolution is like clay being shaped. It can be molded into many forms, but once fired in the kiln, there’s no going back. A new study shows the same is true for some mammals that fully embraced life in the ocean. 🌊🐋 #Evolution #Science #OceanHoptimism
royalsocietypublishing.org
Dollo meets Bergmann: morphological evolution in secondary aquatic mammals | Proceedings of the Royal Society B: Biological Sciences
Secondary transitions to aquatic environments are common among vertebrates, and aquatic lineages display several adaptations to this realm, some of which might make these transitions irreversible. At ...
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Kenneth De Baets @djbirddanerd.bsky.social · 01/09/2025
Coprolite 💩 happens. Just published: Analyzing #coprolites: Different methods for the study of coprolites in #Vertebrate Ichnology: doi.org/10.1016/B978...
doi.org
Redirecting
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Kenneth De Baets @djbirddanerd.bsky.social · 29/08/2025
Talking about an #invertefest: Pea clams seem to be able to regularly survive passage through the digestive tract of whitefishes...
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Kenneth De Baets @djbirddanerd.bsky.social · 29/08/2025
Talking about another true #invertefest: belemnite "battlefields" or "Schlachtfelder". Despite the name, they are generally used to refer to dense accumulations of #fossil #cephalopod rostra, which can be formed under various mechanisms. Irrespectively, they are a great way to obtain large samples.
A dense accumulation of fossil belemnite rostra (including also some encrusting bivalves) from the Pliensbachian-Toarcian GSSP of Peniche Portugal (see https://doi.org/10.1098/rsos.190494).
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ZD Parasites @loveyourparasites.bsky.social · 22/08/2025
Phytosaurs are my favorite group of extinct reptiles, so for #FossilFriday here’s a throwback to when we found parasites in a coprolite possibly from a phytosaur!! #science #fossils #paleontology #parasites journals.plos.org/plosone/arti...
journals.plos.org
First discovery of parasite eggs in a vertebrate coprolite of the Late Triassic in Thailand
A paleoparasitological investigation of a vertebrate coprolite from the Huai Hin Lat Formation (Upper Triassic) was carried out. Five morphotypes of potential parasite eggs or sporocysts were identifi...
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Kenneth De Baets @djbirddanerd.bsky.social · 21/08/2025
🌊🦑 For 500+ million years, #cephalopods have shaped ocean ecosystems as active predators. In our study, we trace body #size fluctuations of cephalopods—from ancient shelled cephalopods to today’s squids & octopuses—using maximum body volume for comparability across groups. doi.org/10.1038/s415...
Some of the largest known cephalopods as examples for the four studied groups. a, Endoceras giganteum, UMMNH 2019.0385, Platteville, Illinois (display in the University of Michigan Museum of Natural History). b, Deiroceras hollardi, PIMUZ 31922, Early Devonian, Jebel Mdouar, Morocco (display in the Museum of Natural History, University of Zurich). c, Cenoceras rumelangense, Bajocian, Dorset, UK (W. Grulke collection). d, ventral and e, lateral view of Parapuzosia seppenradensis, Campanian, Seppenrade, Germany, displayed at the LWL museum in Münster. f, Megateuthis elliptica, SMNS 60752, Bajocian, Bopfingen-Oberdorf; Germany (display at the Staatliches Museum für Naturkunde, Stuttgart). g, Leptotheutis gigas, Tithonian, Solnhofen (display in the Schaulager Ruhrmuseum, Essen). All photos except a belong to CK. Photo in a by courtesy of J. Bauer (University of Michigan Museum of Natural History).Maximum body sizes in lengths and diameters through the Phanerozoic. a, linear plot. Grey silhouette of a 1.8 m tall person for scale. b, logarithmic plot. c, environmental parameters such as sea-level and sea surface temperatures (blue lines) and the European rock record (brown line). Red lines represent mass extinctions.
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Kenneth De Baets @djbirddanerd.bsky.social · 13/08/2025
Our study explores how #parasite traits, life #cycles, and #host relationships shape shifts between #marine and #freshwater habitats: doi.org/10.1093/icb/...
doi.org
Evolutionary Transitions of Parasites between Freshwater and Marine Environments
Abstract. Evolutionary transitions of organisms between environments have long fascinated biologists, but attention has been focused almost exclusively on
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Kenneth De Baets @djbirddanerd.bsky.social · 12/08/2025
Final days (Deadline: August 15) to apply for a 4-year #PhD position to work on inclusions in Permian-Triassic coprolites and how they can inform us on the impact of mass #extinction of parasite-host associations.
Reconstruction of Ascarites by @Franzanth - an egg attributed to Ascaridae known since the Triassic.
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Kenneth De Baets @djbirddanerd.bsky.social · 31/07/2025
Glad to see this finally available as a preprint. Unique fingerprint of marine ectotherm body size during hyperthermal crises which studies generality of the Lilliput effect and it potential link with climate warming. #paleontology #paleobiology #ecology #evolutionarybiology
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Institute of Evolutionary Biology UW @ibe-warszawa.bsky.social · 11/07/2025
We are looking for a #PhD Student in our group on "Environmental versus host controls on #parasite diversity in #Permian-#Triassic #vertebrate #coprolites" in the NCN project "The impact of mass #extinctions on parasite #diversity and #evolution". www.biol.uw.edu.pl/staze-stypen...
biol.uw.edu.pl
Staże/stypendia dla doktorantów - Uniwersytet Warszawski | Wydział Biologii
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Holly Anderson @palaeophd.bsky.social · 02/07/2025
@djbirddanerd.bsky.social of @ibe-warszawa.bsky.social discusses the 'Palaeoparasitological potential of Permian-Triassic #vertebrate #coprolites' at #EAVP2025
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Holly Anderson @palaeophd.bsky.social · 03/07/2025
#Turtle expert Milan Chroust presents his #EAVP2025 poster, 'Heosemys mossoczyi, a puzzling geoemydid #turtle from the #Pliocene of #Poland'
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Kenneth De Baets @djbirddanerd.bsky.social · 21/05/2025
I am #paleontologist and my research focuses on the diversity and evolution of two #fossil groups - shelled cephalopods with better record and soft-bodied parasites with a poorer record. I was recently asked how and why i started studying the helminths if i am expert on the ammonoids and belemnites?
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