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A Review of the Long-Snouted Species of Apristurus (Chondrichthyes, Scyliorhinidae)
Vol. 1991, No. 4 (Dec. 13, 1991), pp. 992-1002
Stable URL: http://www.jstor.org/stable/1446094
Page Count: 11
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Among species of the deepwater catshark genus Apristurus, some have a very long snout (long-snouted group) and are quite distinct from others in the genus. Seven nominal species from the western North Pacific and the East and South China seas are included in the group. They are reviewed taxonomically and only two species, Apristurus herklotsi and A. longicephalus, are found to be valid. The remaining five species (A. abbreviatus, A. xenolepis, A. brevicaudatus, A. longianalis, and A. longicaudatus) are synonyms of A. herklotsi. Apristurus herklotsi and A. longicephalus are distinguishable by tooth counts, width of the internostril region, number of spiral valves, and length and shape of the duodenum.