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Showing results for tags 'crassiproetus'.
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I am fortunate enough to have such a huge amount of Middle Devonian Givetian material that I thought it best to put the older Middle Devonian stage, the Eifelian, in its own thread. There are some spectacular fossils here as well though! I thought a good place to start would be in the Formosa Reef, which I believe is quite early Eifelian. This tabulate coral and stromatoporoid reef continues similar complexes found from the Middle Silurian, see my: https://www.thefossilforum.com/topic/84678-adams-silurian/page/3/ thread from page three onwards for details. All these Formosa Reef specimens come from a delightful gift from my good friend @Monica who is a tad busy with life at the moment but is fine and still thinking of the forum. This outcrop can be found on Route 12 near Formosa/Amherstburg, Bruce County, Ontario, Canada. This beautiful-looking specimen came to me with only a third of it revealed but I managed to get it this far after nine days of painful pin prepping. Monica found another one and posted it for ID here: https://www.thefossilforum.com/topic/105528-weird-circular-imprints-formosa-reef-lower-devonian/#comment-1172285 The specimen was identified by another Canny Canadian @Kane to be the little stromatoporoid sponge Syringostroma cylindricum. Hardly a reef-builder, but gorgeous nonetheless. It does have a little thickness to it, but not much. Beautiful! Pretty thin, actually. I love this Monica, thank you!
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Hi, I know this is pretty rough. I had been attributing it to Eldredgeops, but I find no mention of Eldredgeops in the Michigan or Ohio Dundee. However all the old writers mention Proetus crassimarginatus, which I think now is Crassiproetus. I don't know if there is enough here to distinguish, but the margin along the pygidium has bothered me all along for Eldredgeops. FYI there are only 5 trilobites mentioned in any of the literature for the Dundee down here. Pseudodechenella nodosa and planimarginata, Trypaulites, Coronura and Crassiproetus. Of course there are many Eldredgeops not many feet up, but none preserved anything like this. Thanks for any help you can give. 355471148_9576358892434785_6581400298562770854_n.mp4
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Just thought I'd share some finds from a club trip to the Devonian of Iowa last Sunday. It was a good trip. A nice clam. This Greenops disintegrated shortly after exposure. Crassiproetus sp. Before After. Enrolled Greenops sp. and Eldredgeops noorwoodensis Group shot
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Proetus (Crassiproetus) canadensis (Stumm 1953)
Ludwigia posted a gallery image in Member Collections
From the album: Trilobites
Pygidium. 3.5cm. Hungry Hollow Member Widder Formation Givetian Middle Devon Found at the south pit at Hungry Hollow, Arkona, On., Canada-
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From the album: Trilobites
As far as I can tell this is a Crassiproetus arietinus from the Little Cedar Formation of Johnson County, Iowa. I say "as far as I can tell" because the trilobites from this formation are not very well documented and C. arietinus is the closest match I could make based on a line drawing and written description. The remarks after the written description state: "Specimens from this interval have been assigned doubtfully to C. arietinus. The holotype is a fragmentary but complete specimen in which the glabell and pygidium have been exfoliated. Since these two features are critical in identifying different species of Crassiproetus, it will be impossible to assign any material to this species with certainty."-- ("Geologic Reconnaissance of the Coralville Lake Area" Orrin Plocher, 1989)
