Luis Collantes
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luiscollantes.bsky.social
Luis Collantes
@luiscollantes.bsky.social
130 followers 170 following 86 posts
Palaeontologist working on trilobites and other Palaeozoic arthropods.

Postdoctoral Researcher at the Yunnan Key Laboratory for Palaeobiology 🇨🇳

Huelva, Andalusia 🇪🇸
Posts Replies Media Videos
Reposted by Luis Collantes
cambriancam.bsky.social
Welcome back to #trilobitetuesday

Here is a beautifully enrolled Dolomitized Calymene celebra from the Silurian (Wenlock) Joliet Dolomite from Grafton, Illinois.
November 18, 2025 at 4:55 PM
Reposted by Luis Collantes
clarkeocrinus.bsky.social
This was my son's first complete trilobite - a goldbug!

This is a Triarthrus eatoni from the famous Ordovician Beecher's Bed of New York. This site preserves soft tissues like legs, gills and antennae with pyrite or fool's gold.

#TrilobiteTuesday
November 19, 2025 at 1:24 AM
Reposted by Luis Collantes
crinoidsoup.bsky.social
Showing off these teensie tiny trilobites for #trilobiteTuesday. My thumbnail for reference on just how tiny! Both are Upper Cambrian aged and hail from the Conasauga Shale Formation of Cave Springs, GA.
Elrathia antiquata Alokistocare sp.
January 14, 2025 at 5:00 PM
luiscollantes.bsky.social
Laville et al. - Synchrotron X-ray tomography sheds light on the phylogenetic affinities of the enigmatic thylacocephalans within Pancrustacea

doi.org/10.1098/rspb...
November 16, 2025 at 11:02 AM
Reposted by Luis Collantes
pakozoic.bsky.social
¡Chorprecha! El hermano mayor de ‘Eso no estaba en mi libro de Hª de los dinosaurios’ llega la semana que viene: ‘Historia de la Paleontología’

almuzaralibros.com/fichalibro.p...
November 14, 2025 at 7:05 PM
Reposted by Luis Collantes
thepalass.bsky.social
ppgm: an R package for integrating neontological, palaeontological & climate data in a phylogenetic comparative framework onlinelibrary.wiley.com/doi/10.1111/... #SVP2025 @alexh-palaeo.bsky.social @datadryad.bsky.social @tamueccb.bsky.social
Flow diagram illustrating the workflow for the ppgm R package. It starts with an extant envelope, fossil data is added, the evolution of climate niche is modelled, and finally climate niche & palaeoclimate are matched to show potential range.
November 15, 2025 at 8:09 AM
Reposted by Luis Collantes
fossilrod.bsky.social
#Fractofusus is the most common organism at many of the #Ediacaran fossil sites in #Newfoundland, and it's also one of the best preserved. Here we can see the complex branching they possessed, preserved in exquisite detail.

#FossilFriday #FractofususFriday
November 14, 2025 at 6:27 PM
luiscollantes.bsky.social
García-Bellido & Gutiérrez-Marco - The giant emucaridid Tafilocaris ordovicica gen. et sp. nov. (Euarthropoda, Nektaspida), a peri-Gondwanan ‘Cambrian’ survivor in the Upper Ordovician Tafilalt Biota of Morocco

doi.org/10.1016/j.gr...
November 15, 2025 at 2:06 PM
Reposted by Luis Collantes
clarkeocrinus.bsky.social
How about a monster trilobite for #FossilFriday?

This is an Isotelus maximus from the late Ordovician near Cincinnati, Ohio.

The Friends of UMMP purchased this specimen and it is on display @ummnh.bsky.social
November 14, 2025 at 11:01 PM
Reposted by Luis Collantes
thepalass.bsky.social
New fossil fungi! A new species of Diplocladiella from the lower Holocene of Argentina: insight into the palaeoecological & palaeoclimatic history of the fossil genus Triporicellaesporites onlinelibrary.wiley.com/doi/10.1002/... #PapersinPalaeontology
Top left: photographs of a vertical river bank showing the geological section studied, with a red arrow indicating holes from which samples were extracted. A close up shows the sampled section in more detail. Bottom left: a map of Argentina (in green) with a red dot indicating the approximate position of Doll Creek in Entre Rios Province. Top right: a single fossil conidium of Diplocladiella arambarriae (LAGEO-ARG-6585-1-AD-S2-07-E28/1); scale bar is 20 microns. Bottom right: vertical plot showing the geological age range of Diplocladiella species from the Paleocene at the bottom to the Pleistocene/Holocen boundary towards the top. Red lines show the ranges of four species, with Diplocladiella arambarriae at the top.
November 12, 2025 at 4:49 PM
Reposted by Luis Collantes
thepalass.bsky.social
A new Early Triassic cyclidan crustacean from the Guiyang biota onlinelibrary.wiley.com/doi/10.1002/... - ecosystem recovery after mass extinction @morphobank.bsky.social #PapersinPalaeontology
Main picture is an artist's reconstruction of the Triassic fossil crustacean Yunnanocylus fortis, newly described from the Guiyan biota. The crab-like animal is shown on the sea bed. Inset in the lower left corner is an image of the holotype (CUGM 00359); scale bar in the lower left corner is 2 mm.
November 11, 2025 at 2:44 PM
luiscollantes.bsky.social
A new paper by Van Roy et al. about new Ordovician sea scorpions from the Fezouata Biota of Morocco🦂
November 12, 2025 at 6:19 AM
Reposted by Luis Collantes
thepalass.bsky.social
Microstructural & geochemical evidence offers a solution to the cephalopod cameral deposits riddle onlinelibrary.wiley.com/doi/10.1111/... @datadryad.bsky.social
Top: scheme showing the proposed new growth cycle model in an orthoceratoid. Ontogenetic progression of cameral deposits is shown from left to right (towards the apex). Organic sheets are formed when the soft body vacates the chamber, increasing the functional surface area of the siphuncle and guiding the precipitation of cameral deposits (red lines). Middle: Transmitted light (on the left) and cathodoluminescence (on the right in red and purple colours) microscopy images of Trematoceras elegans from the St Cassian Formation, Carnian, Late Triassic; PZO 16538-01, cross-section. Bottom: SEM image of Trematoceras elegans, PZO 16535-02, longitudinal section, showing the circular patterns of a single spherulitic sector, with a well-defined boundary to a neighbouring sector (interpreted as a cameral sheet).
November 9, 2025 at 3:43 PM
Reposted by Luis Collantes
seismatters.bsky.social
www.nature.com/articles/d41...).
Pressure to publish is rising as research time shrinks, finds survey of scientists
Researchers feel that pressures to publish are increasing, but the time and resources available to do research are decreasing, according to a survey by Elsevier.
www.nature.com
November 9, 2025 at 5:26 PM
Reposted by Luis Collantes
cormacscoast.bsky.social
A fossil filled concretion chunk - eroded out of shale layers. Almost all of the visible fossils are Goniatites - ancient relatives of Squid and Octopus.
County Clare, Ireland.
November 8, 2025 at 2:50 PM
Reposted by Luis Collantes
callanbentley.bsky.social
Fantastic new slab of eensy little sea urchin fossils from Oregon, courtesy of @smilodonichthys.bsky.social #FossilFriday ⚒️
A slab of rock about the length of a pencil, light gray in color, with orange circular fuzzy bordered fossils, and lots of little orange lines higgledy piggledy all over the slab. Pencil for scale.
November 7, 2025 at 1:30 PM
Reposted by Luis Collantes
fernadovalladares.bsky.social
5 minutos explicando que la ciencia no es escuchada a la hora de tomar decisiones políticas en temas complicados como el cambio climático, la IA y los virus. La narrativa del humor para tomarse más en serio las recomendaciones científicas. RNE Pla B

www.rtve.es/play/audios/...
El Pla B - Fernando Valladares: "En el 80% dels casos no s’escolta la ciència"
Fernando Valladares: "En el 80% dels casos no s’escolta la ciència"
www.rtve.es
November 5, 2025 at 12:00 PM
Reposted by Luis Collantes
amnh.org
It’s Trilobite Tuesday! In 1698, Ogygiocarella became the first trilobite to be described & illustrated in scientific literature. But when it was first discovered in English outcrops, it hadn’t been recognized as a trilobite yet. In fact, the Ordovician species was referred to as a “flat fish.”
A photo of a fossilized trilobite. It is brownish in color, surrounded by gray stone. It is flattened, oblong, and has a multi-segmented body.
November 4, 2025 at 1:49 PM
Reposted by Luis Collantes
charnwoodforest.bsky.social
🥳 NEW FOSSIL! Researchers from Canada have named a new species of fossil from the 560 million year old rocks of Charnwood Forest!

🌟 Its called Charnia brasieri, shaped like a frond, and could grow to a metre long.

🌐 Read more on our website: www.charnwoodforest.org/researchers-...
November 4, 2025 at 8:30 AM
Reposted by Luis Collantes
dmcediacaran.bsky.social
This #FossilFriday I’m excitedly sharing a new #Ediacaran #Charnia brasieri named for my PhD Supervisor & friend Martin Brasier who died 2014. I’ve wanted to name something for him ever since but I wanted it to be something special. When I saw the first one from Inner Meadow I knew it was the 1 🧵
leaf shaped animal fossil with sickle shaped branches meeting a a zigzagged axis Charnia brasieri sp nov Shaped of the currently valid species of Charnia and their branch types seafloor reconstruction of Charnia brasieri as a procumbent organisms living among microbial matgrounds
October 31, 2025 at 1:34 AM
luiscollantes.bsky.social
Mcilroy et al.-Growth and disparity of form in the Ediacaran genus Charnia, with description of Charnia brasieri sp. nov. from the Ediacaran of Avalonia

doi.org/10.1016/j.pr...
October 30, 2025 at 8:06 AM
Reposted by Luis Collantes
lapworthmuseum.bsky.social
There are over 20, 000 species of trilobite - all in different shapes and sizes! Trilobites are among the most successful early animals, living in oceans for almost 300 million years, before becoming extinct at the end of the Permian.

Image by Greg Milner.

#TrilobiteTuesday #LapworthRocks
October 28, 2025 at 10:00 AM
Reposted by Luis Collantes
clarkeocrinus.bsky.social
This may be the smallest trilobite in my collection. A tiny 3 mm Triarthrus eatoni from the famous Beecher's Bed (Ordovician Lorraine shale of New York).

#TrilobiteTuesday
October 28, 2025 at 7:40 PM
Reposted by Luis Collantes
coastalpaleo.bsky.social
🦖🐬🧪An incredible "fossil brain" of a fossil fur seal (Thalassoleon macnallyae) from the Pliocene Purisima Formation near Santa Cruz. This incredible specimen preserves a cranial endocast with exquisite detail. Read more about fossil fur seals on my blog: coastalpaleo.blogspot.com/2025/10/the-...
A partial fossil skull in black and white of a juvenile fur seal; the snout is missing, and the right side of the braincase has been removed, revealing an incredibly well preserved cranial endocast.
October 27, 2025 at 3:26 PM
Reposted by Luis Collantes
eduardopuertolas.bsky.social
Os presento nuevo paper sobre cérebros y anatomía de cocodrilos enanos del Jurásico

www.aragosaurus.com/el-cerebro-d...
October 28, 2025 at 7:08 AM