Thrinax baumgartneri
Encyclopedia
Thrinax baumgartneri is an extinct species of shark
Shark
Sharks are a type of fish with a full cartilaginous skeleton and a highly streamlined body. The earliest known sharks date from more than 420 million years ago....

. It was classified based on two relatively complete teeth and two isolated crowns. Due to the limited material available and its similarities to Chlamydoselachus fiedleri, it has been suggested that the criteria with which T. baumgartneri is separated from Chlamydoselachus fiedleri are within the normal variation of Chlamydoselachus
Chlamydoselachus
Chlamydoselachus is a genus of sharks and the sole extant member of the family Chlamydoselachidae, in the order Hexanchiformes. It contains two extant and several extinct species.-Species:...

. This would therefore make T. baumgartneri a junior synonym to Chlamydoselachus fiedleri and, since there is only one identified species within genus Thrinax
Thrinax
Thrinax is a genus in the palm family, native to the wider Caribbean. It is closely related to the genera Coccothrinax, Hemithrinax and Zombia. Flowers are small and bisexual, and are borne on small stalks....

, the whole genus a junior synonym to Chlamydoselachus
Chlamydoselachus
Chlamydoselachus is a genus of sharks and the sole extant member of the family Chlamydoselachidae, in the order Hexanchiformes. It contains two extant and several extinct species.-Species:...

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