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Squalus shiraii Viana & Carvalho, 2020 Shirai's spurdog |
| Family: | Squalidae (Dogfish sharks) | |||
| Max. size: | 68.5 cm TL (male/unsexed); 77 cm TL (female) | |||
| Environment: | pelagic-oceanic; marine; depth range 310 - 390 m | |||
| Distribution: | Northwest Pacific: Japan | |||
| Diagnosis: | Vertebrae: 120-123. This species is distinguished from S. mitsukurii by the following characters: colour of body brown dorsally; caudal fin with ventral and dorsal tips markedly tapered and broadly white; dermal denticles uniscuspidate and lanceolate; larger number of vertebrae, precaudal 91-94, total 120-123 (vs. body dark grey to black; caudal fin with ventral and dorsal tips rounded and not white in colour; denticles tricuspidate and rhomboid; precaudal 86-90 and total 116-117 S. mitsukurii) (Ref. 122378). | |||
| Biology: | Found in shallow waters of the upper continental slope (Ref. 122378). | |||
| IUCN Red List Status: | Vulnerable (VU); Date assessed: 12 May 2022 (A2bd) Ref. (130435) | |||
| Threat to humans: | harmless | |||