Narcinops nelsoni

(CARVALHO, 2008)


Eastern numbfish
Classification: Elasmobranchii Torpediniformes Narcinidae

Reference of the original description
DE CARVALHO, M.R. (2008)
New species of numbfishes from Australia, with a key to Australian electric rays of the genus Narcine Henle, 1834 (Chondrichthyes: Torpediniformes: Narcinidae). CSIRO Marine and Atmospheric Research Paper, 22: 241–260

Image of the original description

Coloration in freshly collected holotype of Narcinops nelsoni sp. nov. (CSIRO H 719–06, 260 mm TL adult male, Capricorn Channel, Queensland): (A) dorsal view; (B) ventral view.In: DE CARVALHO, M.R. (2008): New species of numbfishes from Australia, with a key to Australian electric rays of the genus Narcine Henle, 1834 (Chondrichthyes: Torpediniformes: Narcinidae). CSIRO Marine and Atmospheric Research Paper, 22: 241-260

Synonyms / new combinations and misspellings
Narcine nelsoni, Narcinops cf. nelsoni

Types
Narcinops nelsoni

Narcine nelsoni
Holotype: CSIRO: H 719-06; Paratype: CSIRO: H 719-11; CSIRO: H 719-10; CSIRO: H 719-09; CSIRO: H 719-07; CSIRO: H 719-08; CSIRO: H 719-04; CSIRO: H 719-05; CSIRO: H 719-03; CSIRO: H 719-02; CSIRO: H 719-01; NMV: A 4390; QM: I 20009; QM: I 22095; QM: I 18761;


Description :


Citation: Narcinops nelsoni (CARVALHO, 2008): In: Database of modern sharks, rays and chimaeras, www.shark-references.com, World Wide Web electronic publication, Version 04/2019

Please send your images of "Narcinops nelsoni" to info@shark-references.com

Holotype of Narcinops nelsoni sp. nov. (CSIRO H 719–06, 260 mm TL adult male, Capricorn Channel, Queensland) in dorsal (A) and ventral (B) views. Caudal fin is downturned in (B). In: DE CARVALHO, M.R. (2008): New species of numbfishes from Australia, with a key to Australian electric rays of the genus Narcine Henle, 1834 (Chondrichthyes: Torpediniformes: Narcinidae). CSIRO Marine and Atmospheric Research Paper, 22: 241-260
Common names
eng Eastern numbfish

Short Description
Original diagnosis after CARVALHO, 2008 [3349]: A species of Narcine distinguished from most congeners by presenting tail length, as measured from cloaca, much longer than disc width or length (tail length averaging 54.1% TL, compared to 38.4% and 40.2% for disc width and length, respectively) (vs. tail length smaller than, or subequal to, disc width and length in all other species of Narcine, except N. westraliensis, N. ornata, N. rierai, N. tasmaniensis, and N. lasti). From N. westraliensis and N. ornata, N. nelsoni sp. nov. is distinguished by presenting a uniform light brown dorsal coloration, devoid of any spots or distinctive markings (vs. dorsal coloration composed of horizontal stripes in N. westraliensis, and a unique arrangement of spots and blotches in N. ornata; see description of this species above). From N. rierai, N. nelsoni sp. nov. is distinguished by its much wider than long nasal curtain (vs. nasal curtain slightly longer than wide in N. rierai). From N. tasmaniensis, N. nelsoni sp. nov. is clearly distinguished by having a ridge-like lateral tail fold (vs. lateral tail fold wider and flap-like in N. tasmaniensis), and by its light brown dorsal coloration (vs. usually chocolate brown in N. tasmaniensis). Narcine lasti and N. nelsoni sp. nov. are distinct in dorsal coloration (light brown in the latter species, vs. yellowish-brown in N. lasti), and numbers of exposed tooth rows (relatively fewer rows in N. nelsoni: 9–16/5–12 exposed rows, typically with 12/9 exposed rows in adults, vs. 11–20/8–15 rows in N. lasti, typically with 19/15 rows in adults). Certain proportional measurements further distinguish N. nelsoni sp. nov. from N. tasmaniensis and N. lasti.

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

Size / Weight / Age
31.3 cm TL (male/unsexed; [3349]); 34.8 cm TL (female)

Habitat
benthopelagic; marine; depth range 140 - 540 m [3349]

Remarks
shark-references Species-ID=14813;