Feb 19
7.2" Fossil Brittle Star (Ophiura) With Carpoids - Morocco
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7.2" Fossil Brittle Star (Ophiura) With Carpoids - Morocco
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Finally a blog that understands. Creatures were just built different back then huh
carpoids are the greatest of all bois (vertebrates?)
they really dont make em like they used to
Syringocrinus paradoxicus from the Upper Ordovician of North America (~450 mya). Measuring up to around 6cm long (2.3″), it was part of an extinct group of marine animals known as solutes -- characterized by irregularly-shaped bodies covered in calcite armor plates, the structure of which suggest they were echinoderms despite their complete lack of any proper symmetry.
It had two appendages, one a short “arm” that was probably used for feeding on food particles suspended in the water, and the other forming a longer stalk-like “tail” that may have served to propel it along the seafloor.
Solutes were once thought to be closely related to the equally weird-looking stylophorans, but some versions of the echinoderm family tree place them much further apart, suggesting their superficial similarities may have been due to convergent evolution instead.
5.2" Ordovician Carpoid Fossil - Ktaoua Formation, Morocco
8" Fossil Brittle Star (Ophiura) With Carpoid - Morocco
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The Bundenbach Carpoid, Rhenocystis latipedunculata (1960)
Phylum : Echinodermata Class : Stylophora Genus : Rhenocystits Species : R. latipedunculata
Early Devoninan
5 cm long (size)
Germany (map)
Rhenocystis latipedunculata is usually classified as an anomalocystoid mitrate carpoid, with the term mitrate deriving from the carpoid’s shape having resemblance to a bishop’s mitre. The carpoid's body itself was supported by an external skeleton of calcitic plates similar to those found in extant echinoderms. They possessed a spiny tail they are thought to have used to push through the soft, muddy sea bottom. While these animals remain enigmatic, one theory posits that a carpoid might be the common ancestor of echinoderms and vertebrates; this theory is based, in part, on the a unique metazoan trait of some carpoids, complete body plan asymmetry, which is not shared with any other animal, living and extinct.