Schroederichthys bivius

(Smith in Müller & Henle, 1838)

Narrowmouthed catshark
Classification: Elasmobranchii Carcharhiniformes Scyliorhinidae

Reference of the original description
Müller, J. & Henle, F.G.J. (1841)
Systematische Beschreibung der Plagiostomen. Berlin, Veit, pp. 1–200

Image of the original description
No image in first description.

Synonyms / new combinations and misspellings
Halaelurus bivius, Scyliorhinus bivius, Scyliorhinus (Halaelurus) bivius, Scylliorhinus bivius, Scyllium bivium

Schroederichthys bivius
Holotype: BMNH: 1851.10.26.148

Description :

Citation: Schroederichthys bivius (Smith in Müller & Henle, 1838): In: Database of modern sharks, rays and chimaeras,, World Wide Web electronic publication, Version 07/2024

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Schroederichthys bivius (Müller & Henle, 1838), © FAO,
Common names
spa Pejegato bocachica, spa Pintarroja, fra \(T\) Holbiche blanche, eng Narrowmouth cat shark, eng Narrowmouth catshark, eng Narrowmouthed catshark, por Tubarão-lagarto

Short Description
Diagnosis after Compagno, 1984 [517]: Field Marks: A Schroederichthys with moderately slim body, narrow snout, and few large dark and small white spots. Diagnostic Features : Trunk and tail fairly slender in adults but extremely attenuated in young. Snout narrowly rounded; anterior nasal flaps narrow and lobate. Mouth relatively narrow and long, especially in adult males. Colour pattern of 7 or 8 dark brown saddles on grey-brown dorsal surface, also relatively few, scattered large dark and small white spots, the dark spots not bordering the saddles. Adults to at least 70 cm.

Southeast Pacific and Southwest Atlantic: central Chile to the Straits of Magellan and Argentina. Source:

Human uses
fisheries: of no interest

Oviparous, paired eggs are laid. Embryos feed solely on yolk [733]. Sexual dimorphism is evident in dentition of male species (Ref. 49562). Males have longer teeth with fewer cusps than females (Ref. 51093) to make "quot;courtship biting"quot; more effective (Ref. 49562). Feeds on invertebrates and fish (Ref. 43115).

Size / Weight / Age
70.0 cm TL (male/unsexed; [517])

demersal; marine; depth range 14 - 78 m [517]

shark-references Species-ID=6227;

Parasites (arranged by Jürgen Pollerspöck)
  • Lernaeopoda bivia Leigh-Sharpe, 1930 [32531]
  • Tautochondria magellanica Munoz, Hernandez & Lopez, 2023 [31453]