Pseudobatos glaucostigmus


Speckled guitarfish
Classification: Elasmobranchii Rhinopristiformes Rhinobatidae

Reference of the original description
JORDAN, D.S. & GILBERT, C.H. (1883)
Descriptions of a New Species of Rhinobatus (Rhinobatus glaucostigma) from Mazatlan, Mexico. Proceedings of the United States National Museum, 6: 210–211

Image of the original description
No image in first description.

Synonyms / new combinations and misspellings
Rhinobatos glaucostigma, Rhinobatos glaucostigmus, Rhinobatus glaucostigma

Pseudobatos glaucostigmus

Rhinobatos glaucostigma
Syntype: USNM: 28205 USNM: 28206 USNM: 29547 USNM: 29602

Description :

Citation: Pseudobatos glaucostigmus (JORDAN & GILBERT, 1883): In: Database of modern sharks, rays and chimaeras,, World Wide Web electronic publication, Version 09/2019

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Pseudobatos glaucostigmus (JORDAN & GILBERT, 1883), © Raúl E. Lara-Mendoza, Laboratorio de Investigación, Universidad Autónoma de Sinaloa
Common names
spa Guitarra, spa Guitarra diablo, spa Guitarra punteada, fra \(T\) Poisson-guitare marbré, eng Speckled guitarfish, eng Splaty-spotted guitarfish

Short Description
Diet: 2013: off Nayarit, Mexico (data from 176 individuals): diet was dominated by crustaceans, primarily decapods, brachyurans, and cumaceans. Diets were similar between sexes and maturity stages [21301];

2015: south-eastern Gulf of California (data from 464 individuals): diet was dominated by shrimps (%IPSIR =43⋅47), amphipods (%IPSIR =18⋅89) and crabs (%IPSIR =18⋅07). [22824];

Eastern Central Pacific: Gulf of California to Ecuador. Source:

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].

Size / Weight / Age
TL min/max: 7,4/87 cm [22085];

weight-length relationship: 2015: Sinaloa, Mexico (data of 1129 specimens, 491 female and 638 males): females: TL min/max: 7.4 to 87 cm (mean of 39.7 cm); males: TL min/max: 8.3 to 71.9 cm (mean of 40.3 cm); Total weight: females: WT: 6 to 2256 g (mean of 332.1 g); males: WT: 6 to 900 g (mean of 284.5 g) [22085]

demersal; marine

shark-references Species-ID=14579;

Parasites (arranged by Jürgen Pollerspöck)