日本扁鲨

カスザメ

SPECIES

1. KingdomAnimalia
2. PhylumChordata
3. ClassElasmobranchii
4. OrderSquatiniformes
5. FamilySquatinidae

Habitatmarine

Observations recorded271

Squatina japonica, Bleeker 1858 : 40, valid, holotype (unique): RMNH 7416 (Eschmeyer, 2005). Figure 4. Common name. Japanese angel shark. Diagnosis. A list of the following distinctive characters: wide but shallow upper lip arch (4.2-5.0% TL in width, 0.8-1.1% TL in height); spiracles with numerous large papillae on inside anterior edge, papillae boxlike in shape; row of thorny tubercles on dorsal originating mid-back and extending to the caudal peduncle; pelvic fins not reaching origin of first dorsal; dorsal fins angular in shape, dorsal bases roughly equal; rusty brown coloration above with fine spotting pattern of numerous small square-shaped spots throughout. Description. Dorsal surface, except for posterior portion of caudal fin, covered with denticles of moderate roughness. Row of tubercles extending posterior from mid-back, also present interdorsal and dorsal-caudal space but smaller in size. Ventral surface smooth except for narrow bands of denticles on the pectoral and pelvic fins. Head somewhat diamond in shape dorsally, length about 0.2 times total length, greatest width occurring just anterior of first gill opening. Interspersed moderately rough tubercles above mouth a