Mustelus whitneyi

Chirichigno, 1973

Humpback smooth-hound
Classification: Elasmobranchii Carcharhiniformes Triakidae

Reference of the original description
Chirichigno, F.N. (1973)
Nuevas especies de peces de los generos Mustelus (Fam. Triakidae), Raja (Fam. Rajidae) y Schedophilus (Fam. Centrolophidae). Informes Especiales, Instituto del Mar del Perú, (42): 1–40

Image of the original description

Mustelus whitneyi Chirichigno, 1973; In: Chirichigno, F.N. 1973 Nuevas especies de peces de los generos Mustelus (Fam. Triakidae), Raja (Fam. Rajidae) y Schedophilus (Fam. Centrolophidae). Informes Especiales, Instituto del Mar del Perú, (42): 1-40

Mustelus whitneyi
Holotype: IMARPE: 1210; Paratype: IMARPE: 10; IMARPE: 842; IMARPE: 1140; IMARPE: 1144; IMARPE: 1192; IMARPE: 1211;

Description :

Citation: Mustelus whitneyi Chirichigno, 1973: In: Database of modern sharks, rays and chimaeras,, World Wide Web electronic publication, Version 07/2024

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Mustelus whitneyi Chirichigno, 1973, TL: 98 cm, female, Cancas, Tumbes, Peru © Adriana Gonzalez Pestana
Common names
spa Musola prieta, spa Piruche, spa Tollo, spa Tollo común, spa Tollo prieto, fra \(T\) Emissole piruche, eng Humpback smooth hound, eng Humpback smooth-hound

Short Description
Diagnosis after Compagno, 1984 [517]: Body fairly stocky, almost humpbacked. Head fairly long, prepectoral length 20 to 24% of total length; snout moderately long and bluntly angular in lateral view, preoral snout 5.6 to 7.6% of total length, preorbital snout 6.7 to 8.5% of total length; internarial space very broad, 2.9 to 3.7% of total length; eyes fairly large, eye length .2 to 3.1 times in preorbital snout and 2.1 to 3.2% of total length; interorbital space moderately broad, 4.5 to 5.6% of total length; mouth moderately long, slightly longer than eye length and 2.6 to 3.7% of total length; upper labial furrows considerably longer than lowers and 2.6 to 3.7% of total length; teeth cuspidate and asymmetric, with a prominent primary cusp and low cusplets occasionally present; buccopharyngeal denticles confined to anterior fourth of palate and tongue tip. Interdorsal space 16 to 21% of total length; trailing edges of dorsal fins naked, with a conspicuous dark margin of bare ceratotrichia; first dorsal broadly triangular, with posteroventrally sloping posterior margin, midbase closer to pelvic bases than pectorals; pectoral fins fairly large, length of anterior margins 14 to 17% of total length, width of posterior margins 11 to 14% of total length; pelvic fins moderately large, length of anterior margins 7.1 to 9.4% of total length; anal fin height 2.3 to 3.8% of total length; anal-caudal space less than or subequal to second dorsal height, and 4.7 to 7.4% of total length; ventral caudal lobe hardly falcate in adults. Crowns of lateral trunk denticles lanceolate, with longitudinal ridges extending their entire length. Skeleton not hypercalcified in adults; palatine processes of palatoquadrates usually subdivided at symphysis, with a short separate medial segment on each side; monospondylous precaudal centra 36 to 41, diplospondylous precaudal centra 47 to 55, precaudal centra 86 to 93. Colour uniform grey or grey-brown above, lighter below, no white or dark spots or dark bars. Development viviparous. Size moderate, adults 68 to 87 cm.

Southeast Pacific: Peru to southern Chile. Source:

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

Viviparous [517]. Distinct pairing with embrace [17086]. Fairly common. Occurs at 17-360 m depth, temperature range 12.88-16.20 °C (Ref. 9097 and 9098). An offshore bottom-dwelling shark found on the continental shelf. Prefers rocky bottom around islands. Feeds on crabs, mantis shrimp, and small bony fishes.

Size / Weight / Age
87 cm TL (female)

demersal; marine; depth range 16 - 211 m, usually 70 - 100 m (Ref. 9253)

shark-references Species-ID=3830;

Parasites (arranged by Jürgen Pollerspöck)
  • Orygmatobothrium musteli (Van Beneden, 1850) [25154]
  • Scyphophyllidium triacis (Yamaguti, 1952) [25154]
  • Symcallio lintoni (Euzet, 1954) [25154]