Crinoid
Size: ~3 cm across the arms
This specimen is mostly consistent with the description of Protaxocrinus sideros (Ausich & Copper 2010), but with a few oddities. The arms' brachials are incredibly wide, easily 3-4 times wider than high for the primibrachials and secundibrachials, as opposed to being around twice as wide (Ausich & Copper 2010). In fact, the first primibrachials are significantly larger and wider than even the radials, and laterally-abutting each other from adjacent rays. Moreover, the proximal brachials are hexagonal in shape and laterally-pointed, as opposed to being rectangular with smooth lateral surfaces (Ausich & Copper 2010). |
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