#Echinodermata
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openpalaeo.bsky.social
New Research Article published in OPal 🔬

Respiratory structures in cornute stylophorans (Echinodermata)

By Christophe Dupichaud, Bertrand Lefebvre, Ninon Allaire, Enzo Birolini, Malo Meyruey, and Martina Nohejlová

www.openpalaeo.org/article/view...
February 18, 2026 at 5:39 AM
evopalaeo.bsky.social
Respiratory structures in cornute stylophorans (Echinodermata)
doi.org/10.26034/la....

As always, published free (no page fees or OA costs) and free to read courtesy of @openpalaeo.bsky.social
#DiamondOA
February 17, 2026 at 8:38 PM
phylumbryozoa.bsky.social
Phylogenomics of extant Crinoidea (Echinodermata) reveals extensive morphological homoplasies and a Permian origin | Royal Society Open Science royalsocietypublishing.org/rsos/article...
Phylogenomics of extant Crinoidea (Echinodermata) reveals extensive morphological homoplasies and a Permian origin
Abstract. Crinoids have Ordovician origins and are unique among living echinoderms in their attachment to the substrate. Most diversity is within Comatulid
royalsocietypublishing.org
February 11, 2026 at 1:36 PM
hoyaboya1.bsky.social
Rouse et al. (2026-02, Royal Society Open Science)（オープンアクセス open access）
「現生のウミユリ類（棘皮動物）のゲノム系統学により，広範な形態的同形形質およびペルム紀の起源が明らかになる」
Phylogenomics of extant Crinoidea (Echinodermata) reveals extensive morphological homoplasies and a Permian origin
doi.org/10.1098/rsos...
Greg W. Rouse et al., CC BY 4.0, https://doi.org/10.1098/rsos.251924 Greg W. Rouse et al., CC BY 4.0, https://doi.org/10.1098/rsos.251924
February 11, 2026 at 7:00 AM
mhngeneve.bsky.social
📄Now published in Historical Biology: "Morphometric study and taxonomic revision of Metopaster species (Asteroidea, Echinodermata) from the Coniacian-Campanian of Northern
Aquitaine" by Loïc Villier, Jérémie Bardin, Marine Fau, Anaïs Salone & Angélique Veysseyre
👇
www.tandfonline.com/doi/full/10....
Morphometric study and taxonomic revision of Metopaster species (Asteroidea, Echinodermata) from the Coniacian-Campanian of Northern Aquitaine
Isolated ossicles of sea stars are commonly collected in the Santonian-Campanian series of northern Aquitaine. The most prominent elements are the marginal ossicles of Metopaster, and especially th...
www.tandfonline.com
February 10, 2026 at 9:45 AM
paleogalli.bsky.social
Uma fauna de estrelas-do-mar (Asteroidea, Echinodermata) excepcionalmente bem preservada do Mioceno Inicial do sudeste da França sjp.pensoft.net/article/1803...
An exceptionally well-preserved starfish fauna (Asteroidea, Echinodermata) from the Early Miocene of southeastern France
A new starfish fauna from the Late Burdigalian (Early Miocene) of the Apt basin (Rhodano-Provençal gulf, southeastern France) is described here. This new starfish fauna comes from accumulation levels ...
sjp.pensoft.net
February 4, 2026 at 1:54 AM
hoyaboya1.bsky.social
Waters & Bradford Macurda (2026-02, Journal of Paleontology)（オープンアクセス open access）
「ウミツボミ綱（棘皮動物）の新たな上目区分の鍵としての呼吸器系」
Respiratory systems as a key to a new superorder division of the class Blastoidea (Echinodermata)
doi.org/10.1017/jpa....
Johnny Waters & D. Bradford Macurda Jr., CC BY 4.0, https://doi.org/10.1017/jpa.2025.10203
February 2, 2026 at 11:26 AM
moremilvus.bsky.social
Ophiocoma echinata

Das ist eine Schlangensternart. Wusste ich bis eben auch nicht, dass das gar keine Seesterne sind, sondern eine andere, eigene Klasse innerhalb des Stammes der Stachelhäuter (Echinodermata)😮
Auf Sand mit ein wenig Meerwasser darauf liegt ein brauner Schlangenstern mit einem runden kugeligen Dingsi in der Mitte und fünf langen Armen.
January 16, 2026 at 6:36 PM
paleogalli.bsky.social
Estudo morfométrico e revisão taxonômica de espécies de Metopaster (Asteroidea, Echinodermata) do Coniaciano-Campaniano do norte da Aquitânia www.tandfonline.com/doi/full/10....
Morphometric study and taxonomic revision of Metopaster species (Asteroidea, Echinodermata) from the Coniacian-Campanian of Northern Aquitaine
Isolated ossicles of sea stars are commonly collected in the Santonian-Campanian series of northern Aquitaine. The most prominent elements are the marginal ossicles of Metopaster, and especially th...
www.tandfonline.com
January 15, 2026 at 3:02 PM
rliblog.mastodon.social.ap.brid.gy
El Holopneustes inflatus es un erizo de mar de espinas cortas que suele envolver con el quelpo Ecklonia radiata, del que se alimenta. 📷Felix Harper #echinodermata
Erizo de mar con púas cortas, cuyos pies ambulacrales son más largos. Está envuelto en un alga.
January 13, 2026 at 8:07 PM
gaudipern.bsky.social
Not a single mention of any of the classes of echinodermata? I'm so saddened by that. 😭
January 2, 2026 at 5:24 PM
yee-qi.bsky.social
However, here are some of them that did scan well that never made it onto the Tumblr, as a treat!

(Read the alt-texts for some FT-inspired descriptions)
ONYCHOPHORA On one Earth, wolves spit adhesive silk and had a hydrostatic skeleton. -Wait, what? These velvety "wolves" would gain pleasure from altruism in the truest sense of the word; wrapping it up in the glue of pack dynamics and bureaucracy. Family groups came together, led by the dominant females of each. Packs merged with packs and formed clans and tribes and cities and states, councils of matriarch royalty serving under the greatest matriarch, switching to democracy or outright dictatorships or simply staying the same. The result of an alliance of even *these* was the Packs Under Maternalist Rule. ARTHROPODA On one Earth, vertebrates never made it to land. Bugs grew big, and they grew wild, unrestrained by competition and free to flood the globe with endless forms most beautiful. They adapted into hyperspecialized niches on the macro scale, and with macro bodies grew macro brains. Caring not for the (vertebrate, nonexistent) reputation of "bug" as "emotionless biological machine," four separate species found a way to live in harmony and sing Kumbaya. Hypersocial in all shapes and forms, they would develop a crowded society catering to all. From this Union of Four would rise a society of four species of crow-to-cat-sized arthropods that co-evolved in an ant colony type setup, allowing synergy and individual codependence - the insect Scouts, the chelicerate Hunters, the myriad of Broodmothers and the crustacean Excavators. ECHINODERMATA On one Earth, there was a big ring - a *big ring*. This was a boon for the sea stars, who quickly expanded across the globe as their Ordovician contemporaries froze to death. Primed to take over, their many regenerating arms reached across the globe - some autonomously, some not. This costed an arm and a leg, and as the complexity of these systems grew over another five mass extinctions, the Radiant Expansionists were primed to reach for the stars they were shaped like. Using their own severed limbs as assistants, they would build their bodies better...until they could no longer. CHORDATA On one Earth, whales walked. But what does that have to do with sharks? For one, it lets them get smarter. Sharks ate their prey in increasingly clever ways, and were hunted by the smartest megateeth of all in turn. From these solitary, terrifying (but handless) hunters, the Frenzy of Otodontid Affairs arose, first cooperating out of common need and then going against their asocial natures to form a society by framing it as an extended - temporary - but extended - feeding frenzy. Fifty thousand years later, many modern Frenzy would tell you that this was a terrible mistake.
January 2, 2026 at 5:22 AM
estirulix.bsky.social
Echinodermata
December 26, 2025 at 3:45 PM
rliblog.mastodon.social.ap.brid.gy
El pepino de mar Neoamphicyclus mutans se entierra en los sedimentos bajo las rocas en las costas del sur de Australia y Nueva Zelanda. Por eso, tanto por estar escondido como por medir 5 cm, es difícil de encontrar. Se podría decir...que no se ve un carajo 😎. 📷Leon Altoff #echinodermata
Pepino de mar rugoso con hileras de pequeños tubérculos.
December 20, 2025 at 8:45 PM
sicb.bsky.social
Dr. Stanton G. Belford will be joining us for our January #SICB zoom

www.stantonbelford.com

He is one of 2024's BIMS authors of

doi.org/10.1093/icb/...

Email sicbmedia@sicb.org to receive the link for

January 20th

at 12 noon est.

#biologist #science #scientists #Echinodermata
December 19, 2025 at 12:53 PM
wondersnorbet.bsky.social
Yes, for even the echinodermata hads bilateralism, unlike many today, if anys. The oldest one is a one they only have the trace fossils for, small worms under the bug matts, consuming bacterial poop maybe, or whatever lay under the bacterial matts, tearing them up, eating rangeomorphs, worm world.
December 18, 2025 at 4:29 AM
wondersnorbet.bsky.social
Cambrian bilateral echinodermata. Hard to reconstruct these from fossils I expect. Be really interested in starfishies.
December 18, 2025 at 12:38 AM
wondersnorbet.bsky.social
And very old! Much unchained too, when you think about the rare vertebrate in the Cambrian, and the prolific numbers of echinodermata and related organisms in the Cambrian seas, even many now extinct bilateral species and I guess you'd call them extinct phyla when that far, we are one fish species!
December 17, 2025 at 7:43 AM
rliblog.mastodon.social.ap.brid.gy
Comatulella brachiolata no es una estrella de mar ni una ofiura, ambas del subfilo Asterozoa, pero sí es un equinodermo, concretamente un crinoideo que como adulto no tiene tallo.📷Jade annise #echinodermata
Criatura similar a una estrella de mar roja y blanca de 10 brazos.
December 14, 2025 at 8:02 PM
rliblog.mastodon.social.ap.brid.gy
El Arbacia nigra es un erizo herbívoro que se alimenta del quelpo Lessonia trabeculata, especialmente los jóvenes, por lo que puede tener un impacto en su población. Se caracteriza por tener una cara plana y otra abovedada. 📷Calo Calvo Mac #echinodermata
Erizos negros sobre una roca.
December 10, 2025 at 8:16 PM
c0nc0rdance.bsky.social
What could have happened: the descendants of Atlascystis stopped making TRUNKS & focused on making radial ARMS.

There are examples of asymmetric, three-fold & five-fold symmetric species in this grouping.

Here's how I'm choosing to visualize it:
Imagine if human babies never got bigger trunks...
A phylogram showing Atlascystis acanthan as ancestral to Echinoderms, with arrows marking where radial symmetry evolved into bilateral symmetry, and then again to radial symmetry in echinodermata. Wray et al (2025) "Head start: fossil clues about how bodies evolved from two-fold to five-fold symmetry"
December 10, 2025 at 3:24 PM
laborjournal.bsky.social
Von wegen „kopflos“!
Neue Transkriptomdaten bringen neue Erkentnisse zum reichlich komplexen Nervensystem der #Stachelhäuter! Mehr dazu im Editorial von Larissa Tetsch:
www.laborjournal.de/editorials/3...

#laborjournal #lifesciences #echinodermata #seeigel #evolutionsbiologie
Oben ist eine Larve von P. lividus mit UMAP-Analyse vor schwarzem Hintergrund zu sehen. Darauf sind Neuronen grün, Muskeln pink, Epidermis blau, Skelett gelb, Verdauuungstrakt oliv, Coelomocyeten lila, Wassergefäßsystem altrosa. Unten: Titel des im Post verlinkten Artikels „Mehr Hirn als Muskel“ sowie dessen Vorspann „Stachelhäuter wie Seesterne oder Seeigel galten lange als „kopflos“ mit simplem Nervensystem. Neue Studien legen nun jedoch das komplette Gegenteil nahe.” Links daneben befindet sich ein Icon mit Smartphone und Magazinseite sowie dem Schriftzug „online lesen!“. In der rechten unteren Ecke befindet sich das Laborjournal Logo. Der erste Absatz des verlinkten Artikels.
December 10, 2025 at 11:25 AM
t-lindsay-sci.bsky.social
🌊 Phylum Friday: Echinodermata - Urchins!! 🌊 While they may look scary, sea urchins are slow-moving herbivores that eat kelp and other algae. Urchins typically hide from light using their tube feet to hold on to shells, algae and detritus for shade and extra protection from predators!
December 5, 2025 at 5:14 PM
nhmsystbiodiv.bsky.social
#ThursdayThrowback: Carter & White present an illustrated catalogue of Forcipulatacea specimens from the Natural History Museum, London- sea stars (Asteroidea, Echinodermata) distinguished by their unique pedicellariae.

Read the study here: buff.ly/Gj82HiT #seastar #biodiversity #collections #NHM
December 4, 2025 at 8:00 AM
rliblog.mastodon.social.ap.brid.gy
El erizo corazón norteño (Brisaster latifrons) es un erizo del mar del barro cuya forma que le da nombre y sus espinas dispuestas tangencialmente le ayudan a enterrarse en el fondo marino. 📷Instituto Hakai #echinodermata
Erizo con espinas blancas tangenciales. Un lado es más estrecho que el otro.
December 2, 2025 at 8:01 PM