New eastern Pacific Ocean record of the rare deep-water fish, Psychrolutes phrictus (Scorpaeniformes: Psychrolutidae)

作者：Aguirre Villasenor Hugo^*; Cruz Acevedo Edgar; Salas Singh Carolina

来源：Revista Mexicana de Biodiversidad, 2016, 87(3): 1141-1145.

DOI：10.1016/j.rmb.2016.06.013

• Blob sculpin
• Benthic
• Mexican Pacific coast
• Hypoxic conditions
• Morphometrics
• Meristics

Psychrolutes phrictus is a benthic deep sea fish known from the eastern North Pacific. On 30 March 2008, a specimen of the blob sculpin P. phrictus (297 mm LT) was caught off the Guerrero coast, Mexico (17 degrees 45'24 '' N, 101 degrees 59'04 '' W). The blob sculpin was taken at a depth of 1,100m within a temperature range of 3.88-4.25 degrees C, where hypoxic (0.57-0.39 mg/l) conditions prevailed; the specimen was captured over a muddy bottom using a benthic sledge. Representatives of this species had never been reported off the Mexican Pacific coast; our new record extends the known southernmost range by 1,733 km, from 33 degrees 19'N to 17 degrees 45'N for the American coast. Although high variations in morphometric and meristic values are known for the 4 species of the genus Psychrolutes (P. paradoxus, P. phrictus, P. sigalutes, and P. sio) from the eastern Pacific Ocean, a combination of traits and species distribution allow us to identity this specimen as P. phrictus.

• 出版日期2016-9