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Showing results for tags 'levenea subcarinata pumilis'.
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The Devonian period is known as "The Age of Fish", but could also be known as "The Age of Brachiopods." In the Early / Lower Devonian, brachiopods reached the height of their diversity towards its end in the Emsian. We see the ancestral groups occurring, lingulids, craniids, orthids, protorthids, pentamerids, rhynchonellids and strophomenids, as well as the later successful groups we have seen before such as atrypids, athyrids and orthotetids, plus the rise of spiriferids, spiriferinids and productids and the beginning of the terebratulids. By the end of the Devonian , several of these groups are extinct or severely reduced in importance and brachiopods never quite recover. Also, the Devonian is the last time we see trilobites with such variation, large sizes and numbers and orthocerids too are much more uncommon after the rise of the goniatites. The massive tabulate coral reefs also disappear after the Devonian. Fascinating period and I hope to share some of its wonders with you. Equally, a lot of this is rather new to me, so I would be very grateful for any assistance, corrections or further information on my specimens. Thank you. The Early Devonian epoch is split into three stages, so let's start with the first of those, the Lochkovian, that began about 419 mya and finished roughly 411 mya. I have been sent a nice selection of brachiopods from the Kalkberg Formation, Helderberg Group by the Mighty @Misha, mostly. But the kind gentleperson also sent me this fascinating little bryozoan hash : It is dominated by fenestellids, which is usually the case in the Devonian, but other orders sill occur. These ones, I think, are Fenestella, but there are so many species in the formation that I wont take a guess as to species : Not sure what this one is ;
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Levenea subcarinata pumilis Brachiopod Bois d'Arc Formation (overlays the Haragan) of Oklahoma TIME PERIOD: Lower Devonian (359-383 Million Years Ago) One of the more common brachiopods that are found in the BoLevenea subcarinata pumilis Brachiopod A.jpg
Dpaul7 posted a gallery image in Member Collections
From the album: MY FOSSIL Collection - Dpaul7
Levenea subcarinata pumilis Brachiopod Bois d'Arc Formation (overlays the Haragan) of Oklahoma TIME PERIOD: Lower Devonian (359-383 Million Years Ago) One of the more common brachiopods that are found in the Bois d'Arc formation is Levenea subcarinata pumilis. It is similar to Rhipimelloides oblata except for a few key features. The hinge line is wide and straight and the presence of a wide, shallow fold/sulcus structure. Otherwise they share some similar traits like the rounded shape to the shell and the pedicle valve extending slightly past the brachial valve. Another difference are the fine costae on the valve surfaces which on L. subcarinata pumilis are more curved instead of straight. the margin between the valves is flat except for where it bends to follow the fold/sulcus. Kingdom: Animalia Phylum: Brachiopoda Class: Rhynchonellata Order: †Orthida Family: †Dalmanellidae Genus: †Levenea Species: †subcarinata pumilis -
Levenea subcarinata pumilis Brachiopod Bois d'Arc Formation (overlays the Haragan) of Oklahoma TIME PERIOD: Lower Devonian (359-383 Million Years Ago) One of the more common brachiopods that are found in the BoLevenea subcarinata pumilis Brachiopod A.jpg
Dpaul7 posted a gallery image in Member Collections
From the album: MY FOSSIL Collection - Dpaul7
Levenea subcarinata pumilis Brachiopod Bois d'Arc Formation (overlays the Haragan) of Oklahoma TIME PERIOD: Lower Devonian (359-383 Million Years Ago) One of the more common brachiopods that are found in the Bois d'Arc formation is Levenea subcarinata pumilis. It is similar to Rhipimelloides oblata except for a few key features. The hinge line is wide and straight and the presence of a wide, shallow fold/sulcus structure. Otherwise they share some similar traits like the rounded shape to the shell and the pedicle valve extending slightly past the brachial valve. Another difference are the fine costae on the valve surfaces which on L. subcarinata pumilis are more curved instead of straight. the margin between the valves is flat except for where it bends to follow the fold/sulcus. Kingdom: Animalia Phylum: Brachiopoda Class: Rhynchonellata Order: †Orthida Family: †Dalmanellidae Genus: †Levenea Species: †subcarinata pumilis
