Diagnosis
provided by World Register of Marine Species
Thalassometridae with centrodorsal truncated conical to columnar with 10 columns of 2- 4 cirrus sockets separated by interradial ridges and alternating along midradial line. Arms as many as 20, compressed and sharply carinate, sometimes with overlapping spine. Brachitaxes all with 2 brachials. Proximal brachials narrow, gable-like in cross section. First pinnule larger than second, but not especially stout or basally broadened.
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