“Promachoteuthis sulcus”

3 years ago by in Featured, Social Science, Social Science

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Promachoteuthis sulcus is a species of promachoteuthid squid. It is distinguished from related taxa on the basis of several morphological features: nuchal fusion between the head and mantle, much larger size of arm suckers compared to club suckers, greater width of tentacle base than arm base, a recessed club base, and the presence of an aboral tentacle groove.

P. sulcus is known from a single specimen caught by the German research vessel R/V Walther Herwig in an open net off Tristan Da Cunha, southern Atlantic Ocean (36°49′S 12°17′W), at a depth of 1,750–2,000 m (5,740–6,600 ft).

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