Rhinobatos borneensis, Borneo guitarfish

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Rhinobatos borneensis Last, Séret & Naylor, 2016

Borneo guitarfish
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drawing shows typical species in Rhinobatidae.

Classification / Names Noms communs | Synonymes | Catalog of Fishes(Genre, Espèce) | ITIS | CoL | WoRMS | Cloffa

Élasmobranches (requins et raies) (sharks and rays) > Rhinopristiformes (Shovelnose rays) > Rhinobatidae (Guitarfishes)
Etymology: Rhinobatos: Greek, rhinos = nose + Greek, batis, -idos = a ray (Raja sp.) (Ref. 45335);  borneensis: Named for its type locality, Borneo.

Environment: milieu / climate zone / depth range / distribution range Écologie

; marin benthopélagique.   Tropical; 8°N - 1°N, 108°E - 118°E (Ref. 114953)

Distribution Pays | Zones FAO | Écosystèmes | Occurrences | Point map | Introductions | Faunafri

Northwest Pacific: South China Sea, off Borneo.

Taille / Poids / Âge

Maturity: Lm ?  range ? - 63 cm
Max length : 68.6 cm TL mâle / non sexé; (Ref. 108568); 90.0 cm TL (female)

Description synthétique Morphologie | Morphométrie

This species is distinguished by the following characters in adults: a wedge-shaped disc, its width 29-31% TL and length 1.30-1.42 times width; snout length 2.5-3.3 times the interspiracular distance, 3.8-5.6 times the interorbital width; medium-sized orbit, 1.5-2.2 times the spiracle length; nostrils weakly oblique, length 1.5-1.7 times internarial distance; preoral length 7.4-8.1 times the internarial distance; anterior nasal flaps are penetrating slightly into internarial space but well separated at their insertion (not reaching level of inner corner of nostril); posterior nasal flaps are broad; spiracular folds 2, the outermost fold distinctly taller than inner fold; ridges of rostral cartilage almost parallel, converging slightly anteriorly but not constricted medially; anterior cartilage sickle-shaped, pointed or blunt posteriorly; distance between fifth gill slits 2.7-3.3 times in ventral head length; prebranchial sensory pore patch obvious, extending to just behind first gill slit; postscapular sensory canal apparent with exposed lateral pores, grooved; thorn patches present on supraorbit, scapular region, and dorsal midline rudimentary, not evident; in males pelvic-fin inner margin subequal to its base, shorter in females; interdorsal distance 2.5-3.3 times first dorsal-fin base; dorsal caudal margin 1.9-2.3 times preventral margin; upper jaw with ca. 90 tooth rows; post-synarcual centra 176-180; nasal lamellae 50-53; dorsal fin usually with a large, often faint, central dusky blotches; in adults dorsal disc yellowish or brownish, often with diffuse pale yellowish blotches, without white spots; young with ocellate markings (Ref. 108568).

Biologie     Glossaire (ex. epibenthic)

This species is probably benthic on continental shelf. Biology of the species is poorly known, but for finding a pregnant female with 6 pups (Ref. 108568). Matures at ca. 63 cm TL (Ref. 114953).

Life cycle and mating behavior Maturité | Reproduction | Frai | Œufs | Fécondité | Larves

Référence principale Upload your references | Références | Coordinateur : McEachran, John | Collaborateurs

Last, P.R., B. Séret and G.J.P. Naylor, 2016. A new species of guitarfish, Rhinobatos borneensis sp. nov. with a redefinition of the family-level classification in the order Rhinopristiformes (Chondrichthyes: Batoidea). Zootaxa 4117(4):451-475. (Ref. 108568)

Statut dans la liste rouge de l'IUCN (Ref. 123251)

  Non évalué 

CITES (Ref. 123416)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Menace pour l'homme

  Harmless





Utilisations par l'homme

FAO - Publication: search | FishSource |

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Sources Internet

Aquatic Commons | BHL | Cloffa | Websites from users | FishWatcher | CISTI | Catalog of Fishes: Genre, Espèce | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GenBank: génôme, nucléotide | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | Arbre de Vie | Wikipedia: aller à, chercher | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00302 (0.00153 - 0.00594), b=3.13 (2.96 - 3.30), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Niveau trophique (Ref. 69278):  3.8   ±0.4 se; based on size and trophs of closest relatives
Résilience (Ref. 120179):  Milieu, temps minimum de doublement de population : 1,4 à 4,4 années (Preliminary K or Fecundity.).
Vulnérabilité (Ref. 59153):  Moderate to high vulnerability (46 of 100) .