Dipturus grahami

LAST, 2008


Graham’s skate
Classification: Elasmobranchii Rajiformes Rajidae

Reference of the original description
LAST, P.R. (2008)
New short-snout members of the skate genus Dipturus (Rajoidei: Rajidae) from Australian seas. CSIRO Marine and Atmospheric Research Paper, 21: 53–98

Image of the original description

Dipturus grahami sp. nov., adult male holotype (CSIRO H 950–01, 619 mm TL, fresh): A, dorsal surface; B, ventral surface. In: LAST, P.R. 2008 New short-snout members of the skate genus Dipturus (Rajoidei: Rajidae) from Australian seas. CSIRO Marine and Atmospheric Research Paper, 21: 53-98



Description :


Citation: Dipturus grahami LAST, 2008: In: Database of modern sharks, rays and chimaeras, www.shark-references.com, World Wide Web electronic publication, Version 11/2018

Please send your images of "Dipturus grahami" to info@shark-references.com

Dorsal surface of Dipturus grahami sp. nov. primary female paratype (CSIRO H 950–02, 540 mm TL, fresh). In: LAST, P.R. 2008 New short-snout members of the skate genus Dipturus (Rajoidei: Rajidae) from Australian seas. CSIRO Marine and Atmospheric Research Paper, 21: 53-98
Common names
eng Graham's skate

Short Description
Original diagnosis of LAST, 2008 [3310]: A small species of Dipturus (to 64 cm TL) with the following combination of characters: disc broad with angular apices, width 76–83% TL, 1.3–1.4 times its length; snout angle 84–96°; tail short, length 0.7–0.8 in distance from snout tip to rear of cloaca; tail slender, width 1.7–2.1 times height at its midlength, 1.4– 2.0 times at first dorsal-fin origin; pre-upper jaw length 15–18% TL, 1.7–1.9 times internasal width; ventral head length 31–33% TL; snout length 2.9–3.5 times interorbital width; orbit diameter 59–83% interorbital width; first dorsal-fin height 1.5–2.1 in its base length; distance from first dorsal-fin origin to tail tip 2.7–3.0 times first dorsal-fin base length, 3.6–5.4 times caudalfin length; pelvic fins of medium size, length of posterior lobe of adult males 17–18% TL, length of anterior lobe 66–69% of posterior lobe in adult males, 77–84% in females and juveniles; adult clasper relatively short, 27– 28% TL, connected to pelvic-fin inner margin at about 37–39% of its length from cloaca; long, narrow bands of fine denticles on anterior margins of both surfaces of disc; single nuchal thorn; malar thorns absent in adult males; tail with single median thorn row in males, additional short anterior dorsolateral and long lateral rows in large females; total pectoral radials 80–85; trunk centra 27–30; predorsal centra 70–75; total centra about 118–127; tooth rows in upper jaw 34–37; almost uniformly dark brown dorsally, only slightly paler greyish brown ventrally; ventral sensory pores unobvious, dark edged but not surrounded by greyish circles.

Distribution
Western Pacific: Australia. Source: www.gbif.org

Size / Weight / Age
62.2 cm TL (male/unsexed; [3310]); 64.1 cm TL (female)

Habitat
benthopelagic; marine; depth range 70 - 490 m [3310], usually 250 - 450 m [3310]