Prostheceraeus nigricornus Schmarda 1859

Prostheceraeus nigricornus Schmarda, 1859 Prostheceraeus nigricornus Schmarda, 1859: 31, pl. 6 fig. 71 (type locality: Paita, Peru). Distribution Paita, Peru. Habitat Benthic. Remarks Schmarda (1859) made a partial description of the species. It is characterized by an oval-oblong body with a reddish-yellow dorsal region, with numerous spots, conspicuous nuchal pseudotentacles, cerebral eyes arranged in a circle, and tentacular eyes distributed over the pseudotentacles. The reproductive system is located in the central region of the body, featuring a long and conspicuous penis papilla.