Brevitrygon javaensis

(LAST & WHITE, 2013)



Classification: Elasmobranchii Myliobatiformes Dasyatidae

Reference of the original description
LAST, P.R. & WHITE, W.T. (2013)
Two new stingrays (Chondrichthyes: Dasyatidae) from the eastern Indonesian Archipelago. Zootaxa, 3722 (1): 1–21

Synonyms / new combinations and misspellings
Himantura javaensis

Types
Brevitrygon javaensis

Himantura javaensis
Holotype: MZB: 21461; Paratype: AMS: I 46280-001; CSIRO: H 5859-01; CSIRO: H 5859-03; CSIRO: H 5860-08; CSIRO: H 5860-11; CSIRO: H 5860-12; CSIRO: H 5860-14; CSIRO: H 6129-01; MZB: 15053; MZB: 15060; NMV: A 30997-001;


Description :


Citation: Brevitrygon javaensis (LAST & WHITE, 2013): In: Database of modern sharks, rays and chimaeras, www.shark-references.com, World Wide Web electronic publication, Version 02/2019

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Brevitrygon javaensis (LAST & WHITE, 2013) © Peter Last (CMAR, Hobart) and William White (CMAR, Hobart)
Short Description
Description after LAST & WHITE, 2013 [19772]: A very small species of Himantura (to at least 23 cm DW) distinguished by the following combination of features: disc suboval with a long, and broadly pointed snout, angle 104–111°, its length equal to or slightly longer than its width; pectoral-fin apices very broadly rounded, angle 101–104°; orbits small, weakly protrusible, 5–6% DW; short nostrils 3–4% DW; narrow internasal width, 9–10% DW; undamaged tail long, 2.1– 2.2 times DW; sting situated relatively posteriorly on tail, distance from cloaca origin to sting 38–42% DW; pelvic fins relatively small, length 17–20% DW; relatively short claspers, 18–19% DW in adult males; 1–3 (usually 1) small, seed- or heart-shaped suprascapular denticles, no large scute-like thorns or spines on dorsal surface; secondary denticle band well formed and sharply demarcated in adults, very narrow over branchial region, broadest over abdomen, then converging posteriorly near pectoral-fin insertions; tail usually entirely naked; dorsal surface mainly uniformly brownish when skin undamaged, disc margin slightly paler brown; ventral disc and tail white with dark margins on pectoral and pelvic fins, and dark blotches over first four gill slits; pectoral-fin radials 103– 108; total vertebral count (excluding first synarcual centra) 96–100.

Distribution
Known only from the types collected from the Cilacap fish landing site in southern central Java, Indonesia [19772];

Size / Weight / Age
Type specimens ranged in size from 120–234 mm DW [19772];

Habitat
marine; depth range: not known [19772];

Dentition
Tooth rows (in paratypes NMV A 30997-001and CSIRO H 5860-11) about 38–42 in upper jaw; Teeth of adult male paratype (NMV A 30997-001) with larger cusps in upper jaw than in lower jaw; upper jaw teeth suboval to rhomboidal, largest near symphysis and on lateral knobs, more strongly cuspid near jaw angle; lower jaw teeth in strong quincunx, suboval near symphysis, more cuspid near jaw angle. In female paratype (CSIRO H 5860-11) teeth more broadly oval, in strong quincunx, largely acuspid. [19772];

Remarks
shark-references Species-ID=14638;