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Weekly Invertebrates 🕷️

@invertoftheweek.bsky.social
5 followers 1 following 16 posts

🕸️ Weekly positivity account for anything without a spine!

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Weekly Invertebrates 🕷️ @invertoftheweek.bsky.social · 16/02/2025
www.youtube.com/watch?v=GAxo...
youtube.com
DROSOPHILA MELANOGASTER - How fruitflies are helping our study of the brain
YouTube video by AZPM
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Weekly Invertebrates 🕷️ @invertoftheweek.bsky.social · 16/02/2025
Wikipedia: en.wikipedia.org/wiki/Drosoph... The Berg Lab: depts.washington.edu/cberglab/wor... Society for Mucosal Immunology: www.socmucimm.org/resources/ne...
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Weekly Invertebrates 🕷️ @invertoftheweek.bsky.social · 16/02/2025
Image credits: Craig Biegler (www.inaturalist.org/observations...), CC-BY-NC Jesse Rorabaugh (www.inaturalist.org/observations...), CC0
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Weekly Invertebrates 🕷️ @invertoftheweek.bsky.social · 16/02/2025
In 2001, a study comparing the genome of D. melanogaster and the human genome estimated that they share around 60% of their genes. Furthermore, about 75% of human disease genes have a match in this fly's genome, allowing it to be used as a model for human diseases such as Parkinson's and diabetes.
D. melanogaster individual. There is a scale showing 1mm in comparison.D. melanogaster individual. There is a scale showing 1mm in comparison.
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Weekly Invertebrates 🕷️ @invertoftheweek.bsky.social · 16/02/2025
One of the most studied organisms in biological research, this fly is a very popular model organism due to several factors, such as inexpensive care, short reproduction time, and a well-understood lifecycle. It's so popular, in fact, that it was the first ever animal to be launched into space.
D. melanogaster individual. There is a scale showing 1mm in comparison.D. melanogaster individual. There is a scale showing 1mm in comparison.D. melanogaster individual. There is a scale showing 1mm in comparison.
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Weekly Invertebrates 🕷️ @invertoftheweek.bsky.social · 16/02/2025
The invertebrate of the week is... Drosophila melanogaster, or the Common Fruit Fly!
D. melanogaster individual, standing on fabric.D. melanogaster individual, standing on fabric.
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Weekly Invertebrates 🕷️ @invertoftheweek.bsky.social · 26/01/2025
WoRMS: www.marinespecies.org/aphia.php?p=... Habitas: www.habitas.org.uk/marinelife/s... SeaLifeBase: www.sealifebase.se/Summary/Spec...
marinespecies.org
WoRMS - World Register of Marine Species - Halisarca dujardinii Johnston, 1842
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Weekly Invertebrates 🕷️ @invertoftheweek.bsky.social · 26/01/2025
Image credits: Christine Morrow (www.inaturalist.org/observations..., www.inaturalist.org/observations..., www.inaturalist.org/observations...), CC-BY-NC Pierre Corbrion (www.inaturalist.org/observations...), CC-BY-NC-SA
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Weekly Invertebrates 🕷️ @invertoftheweek.bsky.social · 26/01/2025
H. dujardinii are usually found at depths of 0-50m (although greater depths, such as 80m or even as far as 300m, have been found), attached to stones, boulders, algae, empty shells of lamellibranchs, carapaces of crabs, at the base of gorgonians, and also on the ascidian Styela rustica.
H. dujardinii specimen, adhered to a rock.Close-up shot of a H. dujardinii specimen.
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Weekly Invertebrates 🕷️ @invertoftheweek.bsky.social · 26/01/2025
Named for its gelatinous texture, this sponge contains no crystals or spicules (the hard, structural components that make up the skeletons of most sponges), making it aspiculous. Instead, it contains a network of fibrils that help to maintain its shape.
H. dujardinii specimen, adhered to kelp.H. dujardinii specimens, adhered to kelp.
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Weekly Invertebrates 🕷️ @invertoftheweek.bsky.social · 26/01/2025
The invertebrate of the week is... Halisarca dujardinii, or the Yellow Gelatine Sponge!
H. dujardinii specimen, adhered to a rock.
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Weekly Invertebrates 🕷️ @invertoftheweek.bsky.social · 19/01/2025
WoRMS: www.marinespecies.org/aphia.php?p=... GBIF: www.gbif.org/species/2501...
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Weekly Invertebrates 🕷️ @invertoftheweek.bsky.social · 19/01/2025
Image credits to Robert P. Higgins from his book 'The Atlantic Barrier Reef Ecosystem at Carrie Bow Cay, Belize, II: Kinorhyncha', at www.biodiversitylibrary.org/page/41893415 (CC BY-NC-SA 3.0).
biodiversitylibrary.org
no.18=2 (1983) - The Atlantic Barrier Reef ecosystem at Carrie Bow Cay, Belize - Biodiversity Heritage Library
The Biodiversity Heritage Library works collaboratively to make biodiversity literature openly available to the world as part of a global biodiversity community.
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Weekly Invertebrates 🕷️ @invertoftheweek.bsky.social · 19/01/2025
The discovery of P. praedictus led to Pycnophyes quadridentatus (of which one female was found) and P. flagellatus (of which one male was found) into one taxon, Paracentrophyes quadridentatus. This left only Pycnophyes echinoderoides as an aberrant species within Pycnophyes.
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Weekly Invertebrates 🕷️ @invertoftheweek.bsky.social · 19/01/2025
First discovered in 1983 by Robert P. Higgins, this species is notable in that various male juveniles were found to have penile spines, which were not normally seen until the final moult of the six juvenile stages. These juveniles were found to have longer lateral terminal spines than adult males.
Microscope images of P. praedictus male. The text below reads:

"FIGURES 81-86. - Paracentrophyes praedictus, new genus, new species, holotypic male (USNM 69987): 81, segments 2-4, ventral view; 82, same, segments 7, 8; 83, same, segments 12, 13; 84, same, segments 2-4, dorsal view; 85, same, segments 7, 8; 86, same, segments 12, 13. (Interference contrast photographs all with same scale (in μm) as shown in Figure 81.)"Microscope images of P. praedictus. The text below reads:

"FIGURES 87-90. - Paracentrophyes praedictus, new genus, new species: 87, segments 1 (head) and 2 (neck), ventral view, paratypic male (USNM 69989, RH 444.70); 88, segments 12, 13, allotypic female (USNM 69988); 89, same adult as shown in Figure 88, segment 1 (head), dorsal view; 90, same adult as shown in Figure 88, segments 13, 14, dorsal view. (Interference contrast photographs all with same scale (in μm) as shown in Figure 87; BT = buccal tooth, OS = oral style, PH = pharynx, BR = brain.)"
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Weekly Invertebrates 🕷️ @invertoftheweek.bsky.social · 19/01/2025
The invertebrate of the week is... Paracentrophyes praedictus!
Scientific drawings of Paracentrophyes praedictus.

69-74 - Holotypic male, showing the ventral view, dorsal view, segments 2-4 in ventral and dorsal views, and segments 13-14 in ventral and dorsal views.

75-78 - Allotypic female, showing segments 2-4 in ventral and dorsal views, and segments 12-13 in ventral and dorsal views.

79 - Paratypic adult male, showing the head and its components.

90 - The anterior view of the inside of the head.
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