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Hemitrygon longicauda  (Last & White, 2013)

Merauke stingray
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Hemitrygon longicauda
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drawing shows typical fish in this Family.

Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii (sharks and rays) > Myliobatiformes (Stingrays) > Dasyatidae (Stingrays)
Etymology: longicauda: Name referring to its very long tail.

Environment / Climate / Range Ecology

Marine; demersal; depth range 0 - 1 m (Ref. 94245).   Tropical

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Western Pacific, endemic to southern Guinea.

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 31.0 cm WD male/unsexed; (Ref. 94245)

Short description Morphology | Morphometrics

This small species is distinguished by the following combination of characters: plain-coloured with disc subcircular to weakly rhombic, denticle patch developing on central disc with age, continuous row of closely spaced thorns extending along mid-line of disc and tail, small mid-shoulder thorns sometimes present and long tail with dorsal fold reduced to low ridge or none at all, width of disc 1.0-1.1 times its length, trunk depressed; pectoral-fin apex broadly rounded; snout broadly triangular, tip extended slightly anterior margins almost straight; very small eyes, length of orbit and spiracle 2-2.3 in snout length; broad interorbital space, more than 3 times orbit length; narrow mouth with 5 oral papillae; weak labial furrows and folds; lower jaw strongly convex; nasal curtain skirt-shaped, short and broad, the margin weakly fringed, nostrils rather oblique; thorns are spear-shaped or lanceleote, in continuous median row, variable in size and becoming larger posteriorly, 3 nearest caudal sting often greatly enlarged; widely-spaced denticles confined to patched between orbits and on central disc of largest individuals; elongated tail is slender and constricted slightly at sting then becoming whip-like, it length 2.3-2.9 times WD, probably 1 sting; ventral fold elongate, low, (base length about equal to distance from snout to 5th gill slit); dorsal fold often a low ridge or absent; triangular pelvic fin (Ref. 114953).

Biology     Glossary (e.g. epibenthic)

Little is know about the species but apparently loves mainly nearshore in shallow water. Probably attains more than 31 cm DW or 98 cm TL, no adults known (Ref. 114953). Juvenile specimens caught range from 9.1 to 16.2 cm DW (Ref. 94245).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator : McEachran, John | Collaborators

Last, P.R. and W. White, 2013. Two new stingrays (Chondrichthyes: Dasyatidae) from the eastern Indonesian Archipelago. Zootaxa 3722(1):001-021. (Ref. 94245)

IUCN Red List Status (Ref. 115185)

CITES (Ref. 115941)

Not Evaluated

Threat to humans

  Harmless




Human uses

FAO(Publication : search) | FisheriesWiki |

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Internet sources

BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | ECOTOX | Faunafri | Fishes of Iran | Fishtrace | GenBank(genome, nucleotide) | GloBI | GOBASE | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Scirus | SeaLifeBase | Tree of Life | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoological Record

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5010   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm Total Length, based on all LWR estimates for this body shape (Ref. 93245).
Trophic Level (Ref. 69278):  3.7   ±0.5 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278):  .
Vulnerability (Ref. 59153):  Very high vulnerability (90 of 100) .