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Kevin Stevens

@neohibolites.bsky.social

470 followers 580 following 390 posts

Cichlid enthusiast and paleontologist. https://www.researchgate.net/profile/Kevin-Stevens-2

www.researchgate.net

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Kevin Stevens @neohibolites.bsky.social · May 27

What do we know about the earliest history of cichlid fishes? Here’s an extended and updated English version of my article on the biogeography and early evolution of cichlids, which I originally published in German in 2020. 🐟 🧪 #cichlid #biogeography #paleontology
cichlidae.com/article.php?...

Biogeography, evolution, and ecology of the ancestral cichlids

This article examines the early evolution and biogeography of cichlids, discussing fossil evidence and the hypotheses regarding their origins. It reviews the debate between Gondwanan vicariance and ma...

cichlidae.com

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Reposted by Kevin Stevens

Chris Mah @echinoblog.bsky.social · 6d

I have over the years accumulated pix of various octopus themed samurai helmets! the black one is 19th Century and the others are I believe 17th and 18th Edo era #octopusday #worldoctopusday

gold octopus samurai helmet type 1 with strap

type 2 octopus in gold on samurai helmet

darker metal black-brown octopus helmet with gold sunburst design

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Juan J. Schmitter-Soto @jjschmittersoto.bsky.social · 10h

Mi filogenia de Astyanax en Mesoamérica basada en osteología pasó de 2000 lecturas y va para 30 citas.

Disponible en www.researchgate.net/publication/...

(PDF) A phylogeny of Astyanax (Characiformes: Characidae) in Central and North America

PDF | A phylogeny is presented for 34 species of Astyanax, 27 of them once included within A. aeneus or A. fasciatus in Central America and Mexico,... | Find, read and cite all the research you need o...

www.researchgate.net

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Crystal Palace Dinos @cpdinosaurs.bsky.social · 1d

A flashback to one of our favourite photos, taken during conservation work on the standing Iguanodon back in 2015, by Lynn Hilton❤️💚

(www.lynnhilton.com)

Colour photo. Closeup of the side face of the standing Iguanodon - a fresh pastel spearmint coat of paint. The dirty fingers of a conservator are poking through fresh white teeth

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Andrej Spiridonov @andrejpaleo.bsky.social · 1d

Steve Wroe discusses the evidence for the giant Pleistocene lions across all continents except Australia and Antarctica.
www.youtube.com/watch?v=NB-s...

That time when giant lions ruled the world?

YouTube video by RealPaleontology

www.youtube.com

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Taissa Rodrigues @taissarms.bsky.social · 1d

Hi Bluesky, I need your help. Please share broadly:

We have an EXCELLENT job opening. We are looking for a non-Brazilian visiting scholar who specializes in Genomics applied to animal evolution, biogeography, and/or biodiversity. This is a one-year contract that can be extended for up to 4 years.

Edital nº 161/2025-Progep - Professor Visitante Estrangeiro | Progep

progep.ufes.br

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Steve Brusatte @stevebrusatte.bsky.social · 2d

Walking in the footsteps of…giant Carboniferous trees?

Some 325 million years ago these coal swamp trees were so heavy they made ‘tree prints’ in the soft coral-infused limestone under the soil.

And today we saw them on our University of Edinburgh undergrad trip to Barns Ness!

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Dr. Solomon David @solomonrdavid.bsky.social · 2d

🎶Here Comes the Gar🎵

Hope this starts your week off well!

Reminder #GarWeek is coming November 3-7!

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Christine Archer RVT 🇨🇦 @nerdrvt.bsky.social · 2d

I normally give the media a break when talking about fish but this article on @vicemagazine.bsky.social is really egregious. This is why you maybe check with someone who is an expert on this topic before publishing. Short thread for why.

A screenshot of a Facebook post linking to a Vice Magazine article about fish in the pet trade. The post states "90 percent of aquarium fish sold in the U.S. are wild-caught, not bred in captivity. That means every time someone buys a neon tetra or clownfish from an online retailer, there’s a solid chance it was yanked straight from a coral reef." The picture is of a freshwater group of fishes found in the rift lakes in Africa.

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Kristen Behrens, PhD @behrenskristen.bsky.social · 3d

For #SundayFishSketch this week I also picked a cichlid (shocker). This time it’s Chromidotilapia guntheri, which is unusual even amongst cichlids because it has biparental mouth brooding. They’re also quite phylogenetically distant from the haplochromines, which are our more typical mouthbrooders

Colored pencil drawing of a pair of Chromidotilapia guntheri. The pair is facing opposite directions and one is slightly smaller and less brightly colored. In the foreground are some of their fry, which still have their yolks

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Better Know a Fish! / 曉得多魚！ @betterknowafish.bsky.social · 3d

We are celebrating baby Ava this week for #SundayFishSketch! For #nursing theme here is Neolamprologus brichardi. In Taiwan hobby circles, cichlids are called 慈鯛—literally a tenderhearted/motherly fish. And this cichlid even forms cooperative nurseries where many parents and young care for fry! 🐡🦑🧪

Square photo of a crayon sketch of a lyre tail cichlid.

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European Geosciences Union (EGU) @egu.eu · 3d

Are you an #ECS looking for creative and engaging ways to #communicate your message? This #workshop is for you!

🎨Graphic Design for Geoscience on Digital Platforms: An Introduction
📆14 Oct 2025 14:00 CEST
🖱️Register here: egu.eu/86A3SQ
Learn more here: egu.eu/3ZJMQ2

📸: Hans Volkert on #imaggeo

Image description: A blue and gray mountainous backdrop .With text reading: ' Workshop Graphic Design for Geoscience on Digital Platforms: An Introduction Register NOW.'

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Butterfly Conservation Europe @europebutterfly.bsky.social · 3d

The new European Butterfly Red List found that the biggest threats to butterflies continue to be habitat loss and degradation but climate warming is having a devastating effect on sp. in the far north and far south of Europe. 52% (34) of all Red List sp. are now threatened by climate warming.

Hipparchia tamadabae (La Palma Grayling) is threatened by wildfires (Photo: Yeray Monasterio, Zerynthia)

Recent wildfire on Gran Canaria (Photo: Yeray Monasterio, Zerynthia)

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Butterfly Conservation Europe @europebutterfly.bsky.social · 4d

We are also deeply saddened that the Madeiran Large White, Pieris wollastoni, is now officially extinct: it was last seen in 1986. The full report can be downloaded here www.bc-europe.eu/documents/68...

A Museum specimen of now extinct Madeiran Large White, Pieris wollastoni (Photo: Sam Ellis)

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Trish Greenhalgh @trishgreenhalgh.bsky.social · 3d

Well done Shafaq Aftab. When a reviewer stole her work and published it under his own name, she fought for a YEAR to get the journal to retract the paper. Just wondering why it took Wiley a YEAR to do this. 🧪 #academicsky

retractionwatch.com/2025/10/03/w...

Wiley retracts study stolen by reviewer, following Retraction Watch coverage

A Wiley journal has retracted a paper more than a year after a researcher reported the work was hers and had been stolen by a reviewer for another journal. As we reported in July, Shafaq Aftab, now…

retractionwatch.com

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Linnea Lungstrom @linnealungstrom.bsky.social · 4d

No better reason to join Bluesky then to say the first chapter of my PhD is out as a preprint! New surgeonfish phylogeny, ecomorphological relationships, evolutionary shape correlations-with NEW method to accurately account for phylogenetic covariation among shapes!

www.biorxiv.org/content/10.1...

Phylogenetic relationships and the evolution of fin and body shape in the surgeonfishes

Patterns of evolutionary change in the fin and body shapes of fishes are strongly related to dietary ecology and locomotor mechanisms, and associations between shapes affects ecomorphological relation...

www.biorxiv.org

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Matt Friedman @friedmanlab.bsky.social · 4d

Opportunity to manage one of the world's great herpetology collections and join the outstanding community of museum folks here at U-M! 🐍🦎🐢🐊🐸

Christopher Dick @chrisdick.bsky.social · 4d

Michigan's #UMMZ Reptiles and Amphibians Collections Manager position is now open. Join a great museums group and help manage the world's second largest herpetology research collection. Please share! careers.umich.edu/job_detail/2...

Res Museum Collection Manager | U-M Careers

careers.umich.edu

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Miki Perkins @mikiperkins.bsky.social · 5d

This is desperately sad. Professor John Woinarski breaks the news for @aunz.theconversation.com that Australia's next animal - the tiny Christmas Island Shrew - has officially been declared extinct.

theconversation.com/and-then-the...

And then there were none: Australia’s only shrew declared extinct

Australia’s only known shrew has been declared extinct. Its loss emphasises the need for national protection of Australia’s rare and unique wildlife.

theconversation.com

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Endangered Species @endangered.bsky.social · 5d

The pungu is a species of cichlid endemic to Lake Barombi Mbo in Cameroon where it prefers shallow waters of about 1 to 3 metres in depth.

IUCN status: Critically Endangered

Pungu (Pungu maclareni) (alt text from Wikimedia)

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jörg.freyhof @jfreyhof.bsky.social · 4d

Weather is grey and cold in Berlin - our moth are not. October is still a great season with many very nice species on the wing. #teammoth, #moth, #stadtnatur, #berlinbiodiversity, #berlin, #urbanbiodiversity

Agrochola macilenta Gelbbraune Herbsteule

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Matt @xenomatt.bsky.social · 5d

World octopus day, you say? Very well, then... here is an octopus (possibly a male argonaut). No clue what the jellyfish is. The jellyfish is swimming down to try and get away from the bright flashing lights.
Pic from a blackwater dive in Balayan Bay, Anilao.

🦑🌿 #Invertebrates

A jellyfish, upside down because it's swimming downwards. On top of its bell is an octopus; it is translucent/white with some visible brown organs.

#Nature #Wildlife #Macro #WildlifePhotography #NaturePhotography #UnderwaterPhotography

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Henry Gee @endofthepier.bsky.social · 5d

‘Matters Arising’

Dr Who accuses the arrogant Professor Stalman that he is ‘a nitwit’. (The Inferno, 1970)

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Chris Lowery @chrislowery.bsky.social · 5d

Happy #FossilFriday, the University of Texas is hiring two curators/non-TT professors for our Vertebrate and Non-vertebrate Paleontology Labs: apply.interfolio.com/175702

Apply - Interfolio {{$ctrl.$state.data.pageTitle}} - Apply - Interfolio

apply.interfolio.com

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EvolDir @evoldir.bsky.social · 5d

The Max Planck Institute for Evolutionary Biology seeks postdocs in Evolutionary Genomics and Cell Signaling related to biological clocks. More info: https://www.mpg.de/25524526/ and https://www.mpg.de/25524509/ #postdoc

Postdoctoral Fellow (m/f/d) | Evolutionary Genomics, Comparative Genomics and/or Conservation Genomics

Postdoctoral Fellow (m/f/d) in Evolutionary Genomics, Comparative Genomics and/or Conservation Genomics

www.mpg.de

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Kristen Behrens, PhD @behrenskristen.bsky.social · 6d

New paper alert! Not yet formatted, but check it out to see what we found regarding sex chromosomes in tilapia and other outgroup cichlid species.

academic.oup.com/gbe/advance-...

Before the East African radiation: sex chromosome systems in basal haplotilapiine cichlids

Abstract. Cichlid fishes have undergone an extraordinary diversification in East Africa. They also have a high rate of sex chromosome turnover. This clade

academic.oup.com

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Kevin Stevens @neohibolites.bsky.social · 5d

🐟🧪

UAntwerp FunMorph @uafunmorph.bsky.social · 5d

Fish suck... but species that feed on algae suck differently! 🐟 A new publication in Communications Biology by #UAFunMorph members Jana De Ridder, Peter Aerts, and Sam Van Wassenbergh, demonstrates how head motion patterns for generating suction are finetuned to the species' main diets.