Heteroscymnoides marleyi

FOWLER, 1934


Longnose pygmy shark
Classification: Elasmobranchii Squaliformes Dalatiidae

Reference of the original description
FOWLER, H.W. (1934)
Descriptions of new fishes obtained 1907 to 1910, chiefly in the Philippine Islands and adjacent seas. Proceedings of the Academy of Natural Sciences of Philadelphia, 85: 233–367

Image of the original description
Image in copyright.

Types
Heteroscymnoides marleyi
Holotype: ANSP: 53046;


Description :


Citation: Heteroscymnoides marleyi FOWLER, 1934: In: Database of modern sharks, rays and chimaeras, www.shark-references.com, World Wide Web electronic publication, Version 02/2019

Please send your images of "Heteroscymnoides marleyi" to info@shark-references.com

Heteroscymnoides marleyi FOWLER, 1934, © FAO, Food and Agriculture Organization of the United Nations, Ebert, D.A. 2014. On Board Guide for the Identification of Pelagic Sharks and Rays of the Western Indian Ocean. Reproduced with permission, illustration by Marc Dando , Wildlife Illustrator
Common names
spa Tollo pigmeo trompudo, spa Tollo pigmeo troumpudo, fra \(T\) Squale mignon, fra \(T\) Squale mignone, eng Longnose pygmy shark

Short Description
Original Diagnosis after EBERT [22775]: Field Marks: Small size, bulbous elongated snout, no dorsal–fin spines, first dorsal fin far forward, with origin over pectoral–fin bases, second dorsal fin only slightly larger than first, no anal fin, dark brown colour with light–edged fins. Diagnostic Features: Anterior nasal flaps very short, not expanded into barbels. Snout very long, bulbously conical, length almost half head length and about equal to distance from mouth to pectoral–fin origins. Gill openings very small, uniformly wide. Lips thin, not fringed, pleated or suctorial. Teeth strongly different in upper and lower jaws, uppers small, with narrow, acute, erect cusps and no cusplets, not bladelike, lowers much larger, bladelike, interlocked, with a high, moderately broad, semi–erect cusp and distal blade, edges not serrated; tooth rows 22 upper jaw, 23 lower jaw. Both dorsal fins spineless. First dorsal–fin well forward, origin over pectoral–fin bases, insertion far ahead of pelvic–fin origins and much closer to pectoral–fin bases than pelvic fins. Second dorsal fin slightly larger than first but with base about equal to first dorsal–fin base. Origin of second dorsal fin over midbase of pelvic fins. Pectoral fins with short, narrowly rounded free rear tips and inner margins, not expanded and acute or lobate. Caudal fin semi–symmetrical, almost paddle–shaped, with moderately long upper lobe and well–developed lower lobe, subterminal notch strong. No precaudal pits, lateral or midventral keels on caudal peduncle. Dermal denticles flat but with pedicels, with lanceolate, ridged, wedge–shaped, monocuspidate crowns. Cloaca normal, not expanded as a luminous gland. Vertebral counts: total vertebral count 70, precaudal vertebral count 52. Colour: brown with conspicuous light and dark banded fin margins.

Distribution
Southeast Atlantic: near Ascension Island. Western Indian Ocean: Durban, Natal, South Africa.

Human uses
fisheries: of no interest

Biology
Distinct pairing with embrace [17086].

Size / Weight / Age
29.0 cm TL (male/unsexed; [536])

Habitat
benthopelagic; marine; depth range 0 - 502 m [518]

Dentition
tooth formula (upper/lower): 6-7/11-12 [1131];

Links: SEM-images of teeth

Remarks
shark-references Species-ID=2834;