Rhynchorhina mauritaniensis, False shark ray

Rhynchorhina mauritaniensis Séret & Naylor, 2016

False shark ray
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Image of Rhynchorhina mauritaniensis (False shark ray)
No image available for this species;
drawing shows typical species in Rhinidae.

Klassificering / Namn Populärnamn | synonymer | Catalog of Fishes(Släkte, Arter) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii (hajar och rockor) (sharks and rays) > Rhinopristiformes (Shovelnose rays) > Rhinidae (Wedgefishes)
Etymology: Rhynchorhina: Composite name from Rhynchobatus and Rhina indicating that the new genus exhibits features of both genera - with Rhynchobatus-like body with a rounded snout similar to Rhina; mauritaniensis: Named for the country Mauritania, its type locality,.

Miljö: miljö / Klimatzon / djupintervall / distributionsområde Ekologi

marina pelagic-neritic. Tropical; 28°N - 14°N, 18°W - 5°W (Ref. 114953)

Utbredning Territorier | FAO områden | Ekosystem | Förekomster | Prickkarta | Utplanteringar | Faunafri

North-East Atlantic: off Mauritania.

Storlek / Vikt / Ålder

Könsmognad: Lm ?  range ? - ? cm
Max length : 224 cm TL hane/ej könsbestämd; (Ref. 109576); 204.0 cm TL (female)

Kort beskrivning Bestämningsnycklar | Morfologi | Morfometri

This species with a heavy shark-like body is distinguished by the following: head somewhat flattened; snout tip broadly rounded to somewhat quadrangular; tail with a dermal fold along each lower edge; large and falcate dorsal fins 2; caudal fin with distinct upper and lower lobes; conspicuous dermal folds 2 on posterior margin of spiracles; nostrils are very large and oblique, and are separated from each other and from the mouth; anterior nasal flap is small (not extending to inner nostril corner); jaws moderately undulated; with about 66/72 rows of oral teeth arranged in pavement; a row of pointed thorns along each rostral ridge, 2/3 additional thorns may occur on snout tip; a single row of thornlets and thorns in front of orbit extending backward to level of spiracles; a median row of about 36 large, pointed thorns from the nape to first dorsal fin and 6 between dorsal fins, median thorns flanked by two other shorter rows on the nape-shoulder area, additional short rows of thorns may be present on the outer shoulders; body covered with small dermal denticles, the crowns with a median posterior cusp, an extension from the median ridge, and short lateral cusp; dorsal side greyish to greenish with numerous white ocelli-like spots; a large black transverse blotch on ventral snout tip (Ref. 109576). Resembles Rhynchobatus lubberti in having a similar colour pattern, but differs in having a more broadly rounded snout (similar to that of the shark-ray Rhina ancylostoma (Ref. 109576).
Body shape (shape guide): elongated; Cross section: flattened.

Biologi     Ordlista (t.ex. epibenthic)

A benthic species with presumably very restricted distribution range (Ref. 114953). A larger male of 275 cm TL (without the caudal fin) was observed in March 1998 at Agadir (reported not collected by an IMROP fishery observer). Caught by trammel net (Ref. 109576). The species was known from a few specimens caught in shallow water in Banc d'Arguin sandy shoal (Ref. 114953).

Livscykel och parningsbeteende Könsmognad | Reproduktion | Lek | Ägg | Fekunditet | Larver

Huvudreferens Ladda upp dina referenser | referenser | Koordinator | Medarbetare

Séret, B. and G.J.P. Naylor, 2016. Rhynchorhina mauritaniensis, a new genus and species of wedgefish from the eastern central Atlantic (Elasmobrachii: Batoidea: Rhinidae). Zootaxa 4138(2):291-308. (Ref. 109576)

Status på IUCN:s rödlista (Ref. 130435: Version 2025-2 (Global))

  Critically Endangered (CR) (A2d); Date assessed: 03 December 2018

CITES

Appendix II: International trade monitored

CMS (Ref. 116361)

Not Evaluated

Hot mot människor

  Harmless





Mänskliga användningsområden

FAO - Publication: search | FishSource |

Ytterligare information

Trofisk ekologi
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Verktyg

E-bok | Fälthandbok | Längdfördelnings-verktyg | Livshistorie-verktyg | Prickkarta | Fångst-MSY |

Särskilda rapporter

Kontrollera för underhåll av akvarium | Kontrollera om det finns faktablad om arter | Kontrollera om det finns faktablad om vattenbruk

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Sammanfattande sida | Punktdata | Populärnamn | foton

Internet-källor

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: Släkte, Arter | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GloBI | Google Books | Google Scholar | Google | IGFA World Record | OneZoom | Open Tree of Life | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | TreeBase | Tree of Life | Wikipedia: Go, sök | World Records Freshwater Fishing | Zoobank | Zoologiskt register

Uppskattningar baserade på modeller

Index för fylogenetisk mångfald
(Ref. 82804) 		PD50 = 1.0005 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight a=0.00363 (0.00162 - 0.00814), b=3.11 (2.90 - 3.32), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trofisk nivå
(Ref. 69278) 		3.5   ±0.5 se; based on size and trophs of closest relatives
Sårbarhet i fisket
(Ref. 59153) 		High to very high vulnerability (72 of 100). 🛈