Pseudobatos productus

(Ayres, 1854)

Shovelnose guitarfish
Classification: Elasmobranchii Rhinopristiformes Rhinobatidae

Reference of the original description
Ayres, W.O. (1854)
(Description of new fishes from California.) Proceedings of the California Academy of Sciences, (Series 1), 1, 3–22

Image of the original description
No image in first description.

Synonyms / new combinations and misspellings
Rhinobatis producta, Rhinobatis productus, Rhinobatos cf. productus, Rhinobatos productus, Rhinobatus producta, Rhinobatus productus

Pseudobatos productus

Rhinobatos productus
Syntype: USNM: 1009

Description :

Citation: Pseudobatos productus (Ayres, 1854): In: Database of modern sharks, rays and chimaeras,, World Wide Web electronic publication, Version 03/2024

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Pseudobatos productus (Ayres, 1854), © Centro Interdisciplinario de Ciencias Marinas (CICIMAR-IPN)
Common names
spa Guitarra trompa pala, spa Guitarra viola, fra \(T\) Poisson-guitare spatule, eng Guitarfish, eng Pointed-nose guitarfish, eng Shovel-nose shark, eng Shovelnose guitarfish

Short Description
Broad disc is greater in length than width; a relatively smooth dorsal surface except for a single row of thorns around the eyes and extending along the back and tail; a long, pointed snout with a rounded tip; small, rounded, pebble-like teeth; a first dorsal fin that originates closer to the pelvic fin base than to the caudal fin origin; a thick tail and a moderately large caudal fin without a distinct lower lobe. Tooth count: 102-112/98-117. Spiral valve count: 8-10.

Eastern Pacific: endemic to the eastern Pacific from San Francisco, USA to the Gulf of California, and possibly to Mazatlan, Mexico (Ref. 48844). Source:

Human uses
fisheries: commercial; gamefish: yes

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]. Adults of both sexes congregate during the breeding season in shallow bays and estuaries and likewise leave when the pupping season is over after mating (Ref. 48844). Gestation lasts for about 12 months (Ref. 48844).

Size / Weight / Age
119 cm TL (male/unsexed; (Ref. 48844)); 170 cm TL (female); max. published weight: 9,750 g (Ref. 40637); max. published weight: 18 kg; max. reported age: 16 years (Ref. 48844)

demersal; brackish; marine; depth range 1 - 91 m (Ref. 48844), usually 1 - 13 m (Ref. 48844)

shark-references Species-ID=14586;

Parasites (arranged by Jürgen Pollerspöck)
  • Anaporrhutum euzeti Curran, Blend & Overstreet, 2003 [23771]

  • Phlyctainophora squali Mudry & Dailey, 1969 [15949]

  • Eudactylina dactylocerca Deets, 1994 [17867]
  • Kroyerina deborahae Deets, 1987 [15948]
  • Norkus cladocephalus Dojiri & Deets, 1988 [17060]
  • Trebius latifurcatus Wilson, 1921 [14624]