Glaucostegus cemiculus


Blackchin guitarfish
Classification: Elasmobranchii Rhinopristiformes Glaucostegidae

Reference of the original description
Poissons du Nil, de la Mer Rouge et de la Méditerranée, In: Description de l'Egypte ou recueil des observations et des recherches qui ont été faites en Égypte pendant l'expedition de l'Armée français, publié par les ordres de sa Majesté–L'Empereur Napoléon le Grand., pl. 18–27.

Images of the original description (synonym)
Synonyms / new combinations and misspellings
Glaucostegus petiti, Rhinobatos cemiculus, Rhinobatos cemiculus rasus, Rhinobatos congolensis, Rhinobatos petiti, Rhinobatos rasus, Rhinobatos (Glaucostegus) cemiculus, Rhinobatos (Glaucostegus) petiti, Rhinobatus cemiculus, Rhinobatus congolensis, Rhinobatus petiti, Rhinobatus rasus, Rhinobatus (Rhinobatus) cemiculus, Rhinobatus (Rhinobatus) petiti

Glaucostegus cemiculus

Rhinobatos cemiculus
Syntype: MNHN: 1966;
Rhinobatos petiti
Holotype: MNHN: 1929-0222;
Rhinobatus congolensis
Holotype: IRSNB: 31;
Rhinobatus rasus
Holotype: MCZ: 235-S

Description :

Citation: Glaucostegus cemiculus (GEOFFROY SAINT-HILAIRE, 1817): In: Database of modern sharks, rays and chimaeras,, World Wide Web electronic publication, Version 07/2019

Please send your images of "Glaucostegus cemiculus" to

Glaucostegus cemiculus (GEOFFROY SAINT-HILAIRE, 1817), © FAO,
Common names
spa Guitarra, spa Guitarra barba negra, spa Guitarra barbanegra, spa Guitarrón, fra \(T\) Poisson-guitare fouisseur, fra \(T\) Poisson-guitare fouisseux, fra \(T\) Raie guitare, fra \(T\) Raie requin, eng Blackchin guitarfish, ita Muso nero, ita Pesce chitarra, ita Pesce violino, por Viola-barba-negra

Short Description
Rostral ridges narrowly separated, nearly joining in front; anterior nasal lobe extending little if any, posterior nasal flap narrow; spiracle with two well-developed folds of about same size; thorns present around inner margin of orbits, between spiracles, on shoulders and along midline of disc and tail; upper surface brown, underside white, but usually a blackish blotch on snout mainly in juveniles (Ref. 6675).

Eastern Atlantic: northern Portugal to Angola, including the Mediterranean Sea. Source:

Human uses
fisheries: minor commercial; gamefish: yes; price category: low; price reliability: questionable: based on ex-vessel price for species in this genus

Exhibit ovoviparity (aplacental viviparity), with embryos feeding initially on yolk, then receiving additional nourishment from the mother by indirect absorption of uterine fluid enriched with mucus, fat or protein through specialised structures [733]. One or two litters per year, of 4-6 embryos (Ref. 6675). Feeds on fish and invertebrates [20216].

Size / Weight / Age
242 cm TL (male/unsexed; (Ref. 40637)); max. published weight: 49.9 kg (Ref. 40637)

demersal; brackish; marine; depth range 9 - 100 m

shark-references Species-ID=10800;

Parasites (arranged by Jürgen Pollerspöck)
  • Mehracotyle insolita NEIFAR, EUZET & BEN HASSINE, 2001 [18057]

  • Paranisakis squatinae BAYLIS, 1923 [21225]

  • Eudactylina rhinobati RAIBAUT & ESSAFI, 1979 [16609]
  • Perissopus dentatus STEENSTRUP & LÜTKEN, 1861 [16609]