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Showing results for tags 'Pseudodiadema'.
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Echinoid Pseudodiadema aguilera Glen Rose Formation
JamieLynn posted a gallery image in Member Collections
From the album: Texas Cretaceous Fossils: Echinoids
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I FINALLY found one of the echinoids I've been looking for - a Pseudodiadema from the Lower Glen Rose formation of Texas. I have collected fragments from no less than FIVE different locations and @JohnJ assured me there was (to paraphrase) one out there with my name on it. So I believed him! And yes, i did finally stumble across my Pseudodiadema! Albeit hella squished! But that's okay...it's "technically" whole even if it won't be winning any beauty awards....I love it. I apparently have a thing for squished echinoids. Three of my favorites (that I have only found the single specimen so far ) are rather squished. Not broken, amazingly, just.....squished. Geologic forces at work, I guess. So this day....another really nice warm winter Texas day (but windy as heck- not good for my allergies, but I wore my mask), I headed out to another of my favorite Glen Rose spots (where I found that Heterosalenia last month), not really expecting to find much of anything, just out and about and saw this little lump sticking out of the clay. I dug it up and saw it was a big echie of some kind or another. Took it home, washed it off, and thought i had found a Tetragramma tenerum (wasn't really looking at it closely, just saw the tuburcles were perforate so not a phymosoma) and fortunately, John saw the picture and gave me the happy news that it was a Pseudodiadema! So while not exactly adding a new one to my collection...at least adding a better specimen! Also found a nice big Pagurus banderiensis crab claw - complete with top and bottom pincer (usually just find one or the other) And while I am showing the stuff from the Glen Rose, I also brought home a bag of dirt from the other site (the other day) and found some nice little tiny Crab Claws plus something.....really odd. Round Black Crinoids. I have found Isocrinus (the star shaped crinoids there) and a few of them were black (they are usually beige) but I have never seen nor heard of round crinoids from the Glen Rose Formation. Anyone know anything about that? They are mostly TINY - 2-3 mm but I did find one that is 6mm. I swear it looks just like the New York Devonian crinoids, but the matrix in the center is definitely Cretaceous! Strange strange....Anyways...here's the pics! Pseudodiadema aguileria 2 inches Top view....see how squished?? Didn't look like much in the ground, but it caught my eye! Crab Claw Calianassa sp 3 mm Crab Claw Pagurus banderiensis 25 mm Crinoid 6 mm Little ones - 2-3 mms the first one I found attached to the underside of a star shaped Isocrinus:
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Sea urchins are rare members of the Solnhofen biota.
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Pseudodiadema aguilerai (Maldonado, 1953) interambulacral view
JohnJ posted a gallery image in Member Collections
From the album: Glen Rose Formation Echinoids
© John Jackson
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Pseudodiadema aguilerai (Maldonado, 1953) ambulacral view
JohnJ posted a gallery image in Member Collections
From the album: Glen Rose Formation Echinoids
© John Jackson
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Pseudodiadema aguilerai (Maldonado, 1953) apical view
JohnJ posted a gallery image in Member Collections
From the album: Glen Rose Formation Echinoids
© John Jackson
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Pseudodiadema aguilerai (Maldonado, 1953) oral view
JohnJ posted a gallery image in Member Collections
From the album: Glen Rose Formation Echinoids
© John Jackson
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- echinoid
- Glen Rose Formation
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