Hemitrygon parvonigra

(LAST & WHITE, 2008)


Dwarf black stingray
Classification: Elasmobranchii Myliobatiformes Dasyatidae

Reference of the original description
LAST, P.R. & WHITE, W.T. (2008)
Dasyatis parvonigra sp. nov., a new species of stingray (Myliobatoidei: Dasyatidae) from the tropical eastern Indian Ocean. CSIRO Marine and Atmospheric Research Paper, 22: 275–282

Image of the original description

Hemitrygon parvonigra sp. nov., adult male holotype (CSIRO H 1036–15, 384 mm DW, fresh): ventral view. In: LAST, P.R. & WHITE, W.T. (2008): Dasyatis parvonigra sp. nov., a new species of stingray (Myliobatoidei: Dasyatidae) from the tropical eastern Indian Ocean. CSIRO Marine and Atmospheric Research Paper, 22: 275-282

Synonyms / new combinations and misspellings
Dasyatis parvonigra

Types
Hemitrygon parvonigra

Dasyatis parvonigra
Holotype: CSIRO: H 1036-15; Paratype: CSIRO: H 1512-03; CSIRO: CA 4125; WAM: P.29790-001;


Description :


Citation: Hemitrygon parvonigra (LAST & WHITE, 2008): In: Database of modern sharks, rays and chimaeras, www.shark-references.com, World Wide Web electronic publication, Version 04/2019

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Hemitrygon parvonigra sp. nov., adult male holotype (CSIRO H 1036–15, 384 mm DW, fresh): dorsal view; In: LAST, P.R. & WHITE, W.T. (2008): Dasyatis parvonigra sp. nov., a new species of stingray (Myliobatoidei: Dasyatidae) from the tropical eastern Indian Ocean. CSIRO Marine and Atmospheric Research Paper, 22: 275-282
Common names
eng Dwarf black stingray

Short Description
Original diagnosis after LAST & WHITE, 2008 [3352]: A relatively small species of Dasyatis (reaching at least 50 cm DW) with the following combination of characters: broad disc, width 1.2–1.3 times length; snout broadly triangular, angle 116–122°, length 1.7–1.8 times interorbital width; preoral length 2.0–2.2 times mouth width; internasal distance 1.3–1.4 in prenasal length; body and tail mostly naked, denticles confined to midline of disc, single continuous row of 6–10 small nucho-scapular thorns (usually with single scapular thornlet); tail long, very slender, whip-like beyond sting, and almost quadrangular in cross-section at midfold, width 0.8–1.0 times its depth, postcloacal tail length 2.1–2.3 times precloacal length; ventral cutaneous fold long, slender, its length 2.3–3.2 in DW, height 0.4–0.6 in tail depth at its midlength; dorsal skin fold elongate, low, barely taller than a ridge, much shorter than ventral fold; distance from cloaca to sting 1.9–2.2 in precloacal length; pectoral-fin radials 106–109; total vertebral centra 103–109.

Distribution
Eastern Indian Ocean: Australia. Possibly to the western Pacific (Indonesia, off West Papua and the Philippines) where similar forms were collected. Source: www.gbif.org

Size / Weight / Age
38.4 cm WD (male/unsexed; [3352]); 49.8 cm WD (female)

Habitat
benthopelagic; brackish; marine; depth range 124 - 183 m [3352]

Remarks
shark-references Species-ID=14622;