February 3, 2026 at 4:49 PM
Happy Trilobite Tuesday! Todays picture is of Ellipsocephalus Hoffi. #trilobitetuesday
February 3, 2026 at 4:15 PM
Happy Trilobite Tuesday! Todays picture is of Ellipsocephalus Hoffi. #trilobitetuesday
Welcome back to #TrilobiteTuesday!
Here is the cephalon of the "lace collar" trilobite Cryptolithus tessellatus. This comes from the Upper Ordovician Kope Formation (Lower Cincinnatian Series) in Maysville, Kentucky. What you usually find are just pieces scattered throughout the limestones.
Here is the cephalon of the "lace collar" trilobite Cryptolithus tessellatus. This comes from the Upper Ordovician Kope Formation (Lower Cincinnatian Series) in Maysville, Kentucky. What you usually find are just pieces scattered throughout the limestones.
February 3, 2026 at 4:08 PM
Welcome back to #TrilobiteTuesday!
Here is the cephalon of the "lace collar" trilobite Cryptolithus tessellatus. This comes from the Upper Ordovician Kope Formation (Lower Cincinnatian Series) in Maysville, Kentucky. What you usually find are just pieces scattered throughout the limestones.
Here is the cephalon of the "lace collar" trilobite Cryptolithus tessellatus. This comes from the Upper Ordovician Kope Formation (Lower Cincinnatian Series) in Maysville, Kentucky. What you usually find are just pieces scattered throughout the limestones.
It's going to be a beautiful #TrilobiteTuesday here at the #TucsonGemMineralFossilShow
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February 3, 2026 at 1:24 PM
It's going to be a beautiful #TrilobiteTuesday here at the #TucsonGemMineralFossilShow
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American T.V.
YouTube video by The Trilobites - Topic
youtu.be
January 28, 2026 at 8:30 AM
My love of trilobites wavers at the thought of wading a Devonian shore. So many little legs next to mine. Wiggling legs. Would they treat me to a pedicure like Garra rufa? Thanks, I’d rather not. Add water shoes to my time travel kit. He can keep his wiggling legs to himself. #TrilobiteTuesday
January 27, 2026 at 9:28 PM
My love of trilobites wavers at the thought of wading a Devonian shore. So many little legs next to mine. Wiggling legs. Would they treat me to a pedicure like Garra rufa? Thanks, I’d rather not. Add water shoes to my time travel kit. He can keep his wiggling legs to himself. #TrilobiteTuesday
Sine #TrilobiteTuesday is a thing here, here is my little guy. I got him at a souvenir shop near Mammoth Cave KY back in 2009 on clearance, presumably no one wanted it due to the shape, but I think this odd pose gives it character.
January 27, 2026 at 4:47 PM
Sine #TrilobiteTuesday is a thing here, here is my little guy. I got him at a souvenir shop near Mammoth Cave KY back in 2009 on clearance, presumably no one wanted it due to the shape, but I think this odd pose gives it character.
Welcome back to #TrilobiteTuesday
Here is Bumastus ioxus from the Lower Silurian Rochester Shale (Clinton Group) from Middleport, New York State.
Here is Bumastus ioxus from the Lower Silurian Rochester Shale (Clinton Group) from Middleport, New York State.
January 27, 2026 at 4:46 PM
Welcome back to #TrilobiteTuesday
Here is Bumastus ioxus from the Lower Silurian Rochester Shale (Clinton Group) from Middleport, New York State.
Here is Bumastus ioxus from the Lower Silurian Rochester Shale (Clinton Group) from Middleport, New York State.
January 27, 2026 at 3:56 PM
I don't usually do #TrilobiteTuesday, but here's a rather nice large olenellid in an outcrop of Cambrian sediments in Gros Morne National Park, Western Newfoundland.
January 27, 2026 at 1:57 PM
I don't usually do #TrilobiteTuesday, but here's a rather nice large olenellid in an outcrop of Cambrian sediments in Gros Morne National Park, Western Newfoundland.
You rarely find such a nice selection of gilberts.
#TucsonGemMineralFossilShow
#TrilobiteTuesday
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#TucsonGemMineralFossilShow
#TrilobiteTuesday
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January 27, 2026 at 1:48 PM
You rarely find such a nice selection of gilberts.
#TucsonGemMineralFossilShow
#TrilobiteTuesday
@brianbrachiopod.bsky.social
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@nancypope.bsky.social
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#TucsonGemMineralFossilShow
#TrilobiteTuesday
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At Gold Bugs, I was pleasantly surprised to see such a terrific display of American lower Cambrian bugs.
#TucsonGemMineralFossilShow
#TrilobiteTuesday
@brianbrachiopod.bsky.social
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@dovewoman.bsky.social
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#TucsonGemMineralFossilShow
#TrilobiteTuesday
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January 27, 2026 at 1:38 PM
At Gold Bugs, I was pleasantly surprised to see such a terrific display of American lower Cambrian bugs.
#TucsonGemMineralFossilShow
#TrilobiteTuesday
@brianbrachiopod.bsky.social
@flojohorman.bsky.social
@drstevenhobbs.bsky.social
@dovewoman.bsky.social
@drivingforbush.bsky.social
#TucsonGemMineralFossilShow
#TrilobiteTuesday
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Thomas knows best.
And, even if he doesn't, he's in charge, and that's all that matters.
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#PaleoArt #SciArt #Fossils #Travel #PalaeoArt
#TrilobiteTuesday
And, even if he doesn't, he's in charge, and that's all that matters.
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#PaleoArt #SciArt #Fossils #Travel #PalaeoArt
#TrilobiteTuesday
January 20, 2026 at 8:16 PM
Thomas knows best.
And, even if he doesn't, he's in charge, and that's all that matters.
@johnmoffitt.bsky.social
@flojohorman.bsky.social
#PaleoArt #SciArt #Fossils #Travel #PalaeoArt
#TrilobiteTuesday
And, even if he doesn't, he's in charge, and that's all that matters.
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@flojohorman.bsky.social
#PaleoArt #SciArt #Fossils #Travel #PalaeoArt
#TrilobiteTuesday
#TrilobiteTuesday. Deiphon barrandei from the Silurian Wenlock Limestone of Dudley, showing the dome-shaped glabella particularly well. Specimen 3 cm across.
January 20, 2026 at 5:00 PM
#TrilobiteTuesday. Deiphon barrandei from the Silurian Wenlock Limestone of Dudley, showing the dome-shaped glabella particularly well. Specimen 3 cm across.
Welcome back to #TrilobiteTuesday
Here is the schizochroal eye of Dalmanitid trilobite from the Lower Silurian St. Clair Formation from St. Clair Springs, Arkansas. 🎵I always feel like somebody's watching me and I have no privacy. 🎵
Here is the schizochroal eye of Dalmanitid trilobite from the Lower Silurian St. Clair Formation from St. Clair Springs, Arkansas. 🎵I always feel like somebody's watching me and I have no privacy. 🎵
January 20, 2026 at 2:21 PM
Welcome back to #TrilobiteTuesday
Here is the schizochroal eye of Dalmanitid trilobite from the Lower Silurian St. Clair Formation from St. Clair Springs, Arkansas. 🎵I always feel like somebody's watching me and I have no privacy. 🎵
Here is the schizochroal eye of Dalmanitid trilobite from the Lower Silurian St. Clair Formation from St. Clair Springs, Arkansas. 🎵I always feel like somebody's watching me and I have no privacy. 🎵
Thanks for including me.
Stand up.
Speak out.
Do NOT obey.
Stand up.
Speak out.
Do NOT obey.
January 14, 2026 at 3:47 AM
Thanks for including me.
Stand up.
Speak out.
Do NOT obey.
Stand up.
Speak out.
Do NOT obey.
Elrathia kingii, America's most common complete trilobite. Always 13 thoraxic segments ... it's like Old Faithful.
#TrilobiteTuesday
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#TrilobiteTuesday
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January 14, 2026 at 3:43 AM
Elrathia kingii, America's most common complete trilobite. Always 13 thoraxic segments ... it's like Old Faithful.
#TrilobiteTuesday
@brianbrachiopod.bsky.social
@scientistmel.bsky.social
@drstevenhobbs.bsky.social
@nancypope.bsky.social
@flojohorman.bsky.social
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#TrilobiteTuesday
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Talked to a friend in Europe the other day and said that I will enjoy seeing him again in Tucson at the big rock, gem and fossil show.
He cannot travel here anymore because the US is a rogue nation. Our big show is never going to be the same. Damnit.
#TrilobiteTuesday
@flojohorman.bsky.social
He cannot travel here anymore because the US is a rogue nation. Our big show is never going to be the same. Damnit.
#TrilobiteTuesday
@flojohorman.bsky.social
January 14, 2026 at 2:58 AM
Talked to a friend in Europe the other day and said that I will enjoy seeing him again in Tucson at the big rock, gem and fossil show.
He cannot travel here anymore because the US is a rogue nation. Our big show is never going to be the same. Damnit.
#TrilobiteTuesday
@flojohorman.bsky.social
He cannot travel here anymore because the US is a rogue nation. Our big show is never going to be the same. Damnit.
#TrilobiteTuesday
@flojohorman.bsky.social
I'd rather enjoy trilobites than watch the ICE Gestapo killing and torturing American citizens. But I know that I have to stay involved. I read history.
#TrilobiteTuesday
#TrilobiteTuesday
January 14, 2026 at 2:50 AM
I'd rather enjoy trilobites than watch the ICE Gestapo killing and torturing American citizens. But I know that I have to stay involved. I read history.
#TrilobiteTuesday
#TrilobiteTuesday
January 14, 2026 at 2:43 AM
January 14, 2026 at 2:28 AM
Welcome back to #TrilobiteTuesday
Just to show you have big some trilobites can get, here is a replica cast of a slab of Acadoparadoxides trilobites. The original specimen comes from the Middle Cambrian Warwmast Formation in Morroco.
Just to show you have big some trilobites can get, here is a replica cast of a slab of Acadoparadoxides trilobites. The original specimen comes from the Middle Cambrian Warwmast Formation in Morroco.
January 13, 2026 at 3:47 PM
Welcome back to #TrilobiteTuesday
Just to show you have big some trilobites can get, here is a replica cast of a slab of Acadoparadoxides trilobites. The original specimen comes from the Middle Cambrian Warwmast Formation in Morroco.
Just to show you have big some trilobites can get, here is a replica cast of a slab of Acadoparadoxides trilobites. The original specimen comes from the Middle Cambrian Warwmast Formation in Morroco.
This is another specimen from the same area that I did prepare. Note the long genal (cheek) spines that may have helped it from sinking into soft mud like skis.
The front frill is also perforated and pyritized. It may have helped filter the seafloor for food, but it's debated.
#12DaysofFossils
The front frill is also perforated and pyritized. It may have helped filter the seafloor for food, but it's debated.
#12DaysofFossils
January 13, 2026 at 3:29 PM
In 2017, I supported a paper that described trilobite eggs in the cheeks. Horseshoe crabs also store eggs this way until they are fertilized.
I helped with the SEM images.
Beecher's Bed is one of my favorite localities.
#12DaysofFossils
I helped with the SEM images.
Beecher's Bed is one of my favorite localities.
#12DaysofFossils
January 13, 2026 at 3:28 PM