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Showing results for tags 'decapod'.
Found 25 results
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Take this proposal with a grain of salt. Posting it here because I didn't know where else to post it. References: https://www.mindat.org/taxon-8521156.html https://en.m.wikipedia.org/wiki/Callianassa https://pubmed.ncbi.nlm.nih.gov/36095673/ https://nathistoc.bio.uci.edu/crustacea/Decapoda/Neotrypaea californiensis/index.htm C. mortoni material I used in my research: Proposal:
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This crab has spent a very long time on my "projects" shelf. I acquired it second hand from the South Carolina collector, and I am uncertain of its origin. My best surmise is that it is Late Eocene out of the Castle Hayne Formation. It still has some adherent medium-hard limestone matrix. Anyone here recognize this decapod?
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From the album: Pleistocene
Decapod, Oahu Stage 4, Pleistocene May, 2023 -
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Some Say Lightning Doesn't Strike the Same Place Twice...
EPIKLULSXDDDDD posted a topic in Fossil Hunting Trips
Return to the Badlands of North Texas At long last, rain graced the lands of North Texas this past week. For many of us, that meant it was time to finally crawl out of bed and beat the crowd to that one particular site desperately needing a refresh. In my case, I set on my way to explore a newer spot in the Grayson Marl while the ground was still nice and muddy. I'd been to this place once before, but it had already been thoroughly picked over. It's a popular site, but even then, it managed to pull through and produce some fine specimens for me to take home. With that in mind, I su- 9 replies
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- echinoid
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From the album: Pawpaw Formation
Cretacoranina punctata, Tarrant Co. Albian, Cretaceous Apr, 2023 Cretacoranina is a type of "frog crab" which are still around today and are known to bury under the sand with their modified claws. They keep their eyes above the sand and ambush prey. Unlike most other crabs, frog crabs do not have their abdomen tucked beneath their cephalothorax. The frog crab fossil record starts in the Albian which means this specimen is very close to their supposed origin! I actually found the posterior end of this crab a couple of months ago. I knew it was from this species -
From the album: Pawpaw Formation
Steorrosia reidi, Tarrant Co. Albian, Cretaceous Jan, 2023 Surprisingly rare amongst my decapod finds. This one was found broken in half. It's my best specimen as of yet. Distinguished by its unique style of granulation on the carapace. -
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From the album: Pawpaw Formation
Acanthaxius carinatus?, Tarrant Co. Albian, Cretaceous Feb, 2023 Fossil mudshrimps of the Pawpaw are special finds and are easily overlooked. This is my first specimen, but it is missing much of the carapace so identification is difficult. -
From the album: Pawpaw Formation
Steorrosia pawpawensis, Tarrant Co. Albian, Cretaceous Jan, 2023-
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- compound eye
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From the album: Pawpaw Formation
Texicancer renforae, Tarrant Co. Albian, Cretaceous Dec, 2022 -
From the album: Pawpaw Formation
Sterrosia aspera, Tarrant Co. Albian, Cretaceous Dec, 2022 -
Crabs, Ammonites, Gastropods, and More! A Texas Invertebrate Sampler
EPIKLULSXDDDDD posted a topic in Fossil Hunting Trips
Over the month of December, I've gotten the opportunity to check out several sites across the state of Texas. In my fossil interests, I have to admit that I am certainly a bit vertebrate-centric, but that does not mean I will pass up the chance to marvel at a beautiful invertebrate specimen when given the chance. For better or worse, these past four mini hunts have not really delivered on the vertebrate end, but have made up the difference in terms of inverts. I've decided to combine these smaller hunts into one report. For those with invertebrate addictions, I hope this sampler of Texas fossi -
What I believe to be a carpus of the major chela of a ghost shrimp. Not an unusual find for me, but this was found near an exposure of Pittsburgh Bluff formation where previously I have only found them in Astoria formation.
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- oregon
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Jurassic, Callovian, Oxford Clay, Peterborough Member This has enamel, and is the colour I associate with fish remains. Enamel made me think dentition or scale of some kind, but I'm puzzled by the shape. It has a couple of prominent tubercles, which made me think teeth or scale. Any pointers would be greatly appreciated.
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Oxford clay, Peterborough Member, Jurassic, Callovian, near Yaxley in Cambridgeshire. I spent the morning getting muddy in wet clay, and found this. I think it might be part of a hybodont spine, or other ornate fish spine. I've collected a fragment of hybodont spine from this site before. The surface does seem to be enamel, and the shape is slightly curved. Any assistance greatly appreciated.
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I got the chance to go to the Oxford Clay twice over the last few days. I'm always looking for echinoderms at this site, and I prefer this one in winter when the vegetation has died back and I can spot lots of small, delicate detail. These are some if my favourite finds from the last few days.
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- fossil hunting
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Crab in amber jewelry found in a market game-changing for evolutionists: According to U of A, researchers "came across" the 2-millimetre-long crab embedded in a piece of amber jewelry in a Tengchong, China market back in 2015. LINK to article. LINK to paper.
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I think I finally have a precise ID on these, Notopocorystes dichrous, Britton Notopocorystes Assemblage, from far west Dallas county, all from same location, including the little naked carapace. Same species? How did it end up with such a different form of preservation? Then there is one 'crabcretion' that appears to have something, another crab maybe on backside?
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- cretaceous
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I dug this out of an Eagle Ford group embankment yesterday and wanted to get some thoughts on it. There was a very thin layer containing a few black (phosphate?) pebbles and I dug some out to examine. This one was shaped differently so I took it home to investigate further. As soon as I recognized symmetry I knew I had more than a pebble. I'd love to learn what it might be. 1: 2: Specimen rotated away from ruler 1/4th turn. 3: Specimen rotated away from ruler an additional 1/4th turn. 4: Rotated an additional 1/4th turn.
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I'm looking for help with finding a genera from this chela/ crab claw, found in Cenozoic rock from Northwest Nelson, South Island, New Zealand. It is fairly weathered, and was originally split between two separate stones lying on the beach. A little reconstruction and preparation produced the result in the image. It was not in-situ so I am unsure which rock group it is associated with. I'm guessing it is either late Oligocene or early Miocene in age based on what I know of the area, but I could be wrong. I'm hoping there are some crab experts out there who will know what this is straight
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- new zealand
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I found these fragments of something crabby on my last trip to the North Sulphur River in Texas. They were partially exposed in one of the red bed layers of the Ozan Formation, and were so delicate that they started to crumble when I extracted them. I saved the more whole and identifiable pieces. They're a kind of muddy yellow color, with maybe some hints of the original pigmentation in the blue areas. The red beds tend to either turn fossils black (when they're phosphatized) or a dusty red, so this was quite an unusual find for me. The closest to an ID I've been able to get so far is some sor
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Palaeopalaemon newberryi
mcgcsp posted a topic in Partners in Paleontology - Member Contributions to Science
Palaeopalaemon newberryi Chagrin shale Devonian Northeast Ohio, USA Specimens were used in the publication “Morphology and paleoecology of the oldest lobster-like decapod, Palaeopalaemon newberryi Whitfield, 1880”, Journal of Crustacean Biology (2018). Smithsonian USNM (United States National Museum of Natural History, Washington, DC, USA). USNM numbers 617309 617308 617309 618374 706118 Morphology and paleoecology of the oldest lobster-like decapod, Palaeopalaemon newberryi .pdf PP letter of p -
From the album: Cretaceous Vancouver Island
?Bicornisranina bocki? Haslam Formation (Upper Santonian - Lower Campanian) Saanich Peninsula, Vancouver Island, British Columbia -
From the album: Cretaceous Vancouver Island
Joeranina platys Haslam Formation (Upper Santonian - Lower Campanian) Saanich Peninsula, Vancouver Island, British Columbia -
From the album: Cretaceous Vancouver Island
Joeranina platys Haslam Formation (Upper Santonian - Lower Campanian) Saanich Peninsula, Vancouver Island, British Columbia -
Found this specimen in "Woodbine" Tarrant/Dallas Co. Worked some Using 3/8" surgical chisel, got this far and had to stop. Carapace began to chip off with the matrix. MB, whatcha think? Jess B.
