Parmaturus, Garman, 1906

Ebert, David A., 2018, Parmaturus nigripalatum n. sp., a new species of deep-sea catshark (Chondrichthyes: Carcharhiniformes: Scyliorhinidae) from Indonesia, Zootaxa 4413 (3), pp. 531-540 : 540

Key to Parmaturus species in the Indo-Pacific region

1a. Caudal crests without enlarged dermal denticles............................................................ 2.

1b. Caudal crests with enlarged dermal denticles............................................................... 3.

2a. Tooth rows in jaws 130; pre-pelvic length about 47% TL; pre-vent length 52%; and head shorter than abdomen................................................................................. ParmaturuS albipeniS (New Caledonia)

2b. Tooth rows in jaws about 90; pre-pelvic length 40% TL; pre-vent length 44%; and head longer than abdomen........................................................................................ ParmaturuS lanatuS (Indonesia)

3a. First dorsal fin noticeably smaller than much larger second dorsal fin............................................ 4.

3b. First dorsal fin larger than or nearly equal to second dorsal fin................................................. 6.

4a. Head longer than abdomen............... ParmaturuS melanobranchiuS ( Hong Kong, Taiwan, & Ryu-Kyu Islands, Japan)

4b. Head much shorter than abdomen........................................................................ 5.

5a. Pectoral pelvic length long (about 29 % total length)........................... ParmaturuS macmillani (New Zealand)

5b. Pectoral pelvic length short (about 21 % total length)........................... ParmaturuS piloSuS (Japan & Taiwan)

6a. Lower labial furrows much longer than uppers; tooth counts>90 upper and lower rows............................. 7.

6b. Lower labial furrows about equal length; tooth counts <60 upper and lower rows................................................................................................. ParmaturuS nigripalatum new species ( Indonesia)

7a. Precaudal length 78% TL; Pre-anal length 59% TL; dorsal-caudal space 2.8%; tooth rows 92.......................................................................................... ParmaturuS albimarginatuS (New Caledonia)

7b. Precaudal length 84% TL; Pre-anal length 52% TL; dorsal-caudal space 5.7%; tooth rows 120............................................................................................ ParmaturuS biguS (northeastern Australia)