Glaucostegus younholeei

Glaucostegus younholeei Habib & Islam, 2001

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drawing shows typical species in Glaucostegidae.

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

Élasmobranches (requins et raies) (sharks and rays) > Rhinopristiformes (Shovelnose rays) > Glaucostegidae (Giant guitarfishes)
Etymology:

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

; marin démersal. Tropical

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

Eastern Indian Ocean: Bangladesh.

Taille / Poids / Âge

Maturity: Lm ?  range ? - ? cm
Max length : 93.3 cm TL mâle / non sexé; (Ref. 125646)

Description synthétique Morphologie | Morphométrie

This species is distinguished from its congeners by the following set of characters: body brownish or greyish with a narrowly wedge-shaped disc; a long narrow bluntly pointed snout (angle 31-40°); broad oblique nostrils with the narrow anterior opening; nostrils about half of the mouth width, subequal (0.98-1.33) to internasal width; ~55-57 nasal lamellae; anterior nasal flaps are slightly penetrating into internasal space, their interspace 2.20- 2.61 in length of the posterior nasal aperture; in adults the orbit is very small, diameter 8.19-11.62 in preorbital length, 2.25-2.69 in interorbital space; rostral ridges are almost joined along their entire length; margin of cranium sharply demarcated before eyes; spiracular folds are very short and widely separated; rough skin densely covered with small denticles, more coarsely granular on the dorsal surface than ventrally, enlarged between orbits and in a distinct band between nape and first dorsal fin; tail relatively longer, its length 1.15-1.48 in disc length; dorsal fins narrowly spaced, interspace 1.32-2.11 in base length of the first dorsal fin; clasper length in adult male 4.37-5.70 in total length (Ref. 125646).

Biologie     Glossaire (ex. epibenthic)

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

Référence principale Upload your references | Références | Coordinateur | Collaborateurs

Habib, K.A. and M.J. Islam, 2021. Description of a new species of giant guitarfish, Glaucostegus younholeei sp. nov. (Rhinopristiformes: Glaucostegidae) from the northern Bay of Bengal, Bangladesh. Zootaxa 4995(1):129-146. (Ref. 125646)

Statut dans la liste rouge de l'IUCN (Ref. 125652)

  Non évalué 

CITES

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

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | BOLDSystems | 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. 82804):  PD50 = No PD50 data   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00138 - 0.01098), b=3.04 (2.80 - 3.28), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Niveau trophique (Ref. 69278):  3.5   ±0.5 se; based on size and trophs of closest relatives
Résilience (Ref. 120179):  Faible, temps minimum de doublement de population : 4,5 à 14 années (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153):  High vulnerability (57 of 100).