Squaliolus laticaudus, Spined pygmy shark

Squaliolus laticaudus Smith & Radcliffe, 1912

Spined pygmy shark
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Native range | All suitable habitat | Point map | Year 2050
This map was computer-generated and has not yet been reviewed.
Squaliolus laticaudus   AquaMaps   Data sources: GBIF OBIS
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Image of Squaliolus laticaudus (Spined pygmy shark)
Squaliolus laticaudus
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Classificatie / Namen Lokale namen | Synoniemen | Catalog of Fishes(Genus, Soort(en)) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii (haaien en roggen) (sharks and rays) > Squaliformes (Sleeper and dogfish sharks) > Dalatiidae (Sleeper sharks)
Etymology: Squaliolus: Diminutive of squalus (L.), a sea-fish, usually applied to sharks, referring to small size of S. laticaudus (See ETYFish); laticaudus: latus (L.), wide or broad; cauda (L.), tail, referring to its broad (but short) caudal fin (See ETYFish).
More on authors: Smith & Radcliffe.

Milieu: milieu / Klimaatzone / Diepte / verspreidingsgebied Ecologie

marien bathypelagisch; oceanodroom (Ref. 51243); diepte 200 - 1200 m (Ref. 27000). Deep-water; 48°N - 40°S, 180°W - 180°E

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Nearly circumtropical. Western Atlantic: off Bermuda, southern Brazil, and northern Argentina. Eastern Atlantic: off France and Madeira. Western Indian Ocean: off Somalia. Western Pacific: Japan, Taiwan and Philippines (Ref. 13748), as well as Australia (Ref. 7300).

Lengte bij maturiteit / Grootte / Gewicht / Leeftijd

Maturiteit: Lm 18.5, range 17 - 20 cm
Max length : 22.0 cm TL mannelijk / geslacht onbekend; (Ref. 247); 25.0 cm TL (female)

Korte beschrijving Determinatiesleutels | Morfologie | Morfometrie

Dorsale stekels (totaal) : 1; Anale stekels: 0. The spined pygmy shark Squaliolus laticaudus is a very small dogfish (about 25cm) with a large eye (diameter 73-86% of interorbital width), upper margin nearly straight; upper lip without papillae (Ref. 31367, 6871). Color: dark with conspicuously light-margined fins (Ref. 247) . Edge of fins with bright border (Ref. 43998). S. laticaudus is the type species of the genus which has the following distinctive features: fin spine on its first dorsal fin but not on its second dorsal fin; second dorsal fin long-based and low, about twice the length of first dorsal fin base; first dorsal-fin base closer to pectoral fins than to pelvic fins; and caudal fin nearly symmetrical, paddle-shaped, with subterminal notch present; low lateral keels on caudal peduncle . Body cigar-shaped; snout very long, bulbously conical but slightly pointed; mouth ventral; lips thin; teeth strongly different in both jaws, uppers small, narrow and erect cusps, lowers larger, blade-like and semi erect. Tooth rows 22-23/16-21. (Ref. 247, 6871).
Body shape (shape guide): elongated.

Biologie     Verklarende woordenlijst (bv. epibenthic)

An oceanic, wide-ranging, tropical pelagic species occurring near continental and insular land masses, sometimes over the shelves, but usually over the slopes (Ref. 247). Displays vertical migrations on a diel cycle, seen at the bottom during the day and travels to 200 m at night (Ref. 247). Feeds on deepwater squid, lanternfish, gonostomatids and idiacanthids, and probably follows its prey on their diel migrations (Ref. 247). Ovoviviparous (Ref. 205). Has well-developed photophores densely covering the ventral part of the body and sparsely seen on the sides and hardly developed on the dorsal surface (Ref. 247).

Levenscyclus en paargedrag Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven

Probably ovoviviparous. Twelve mature eggs have been found in a single ovary of a mature female but this does not imply that large litters are produced (Ref. 247). Distinct pairing with embrace (Ref. 205).

Hoofdreferentie Upload uw referenties | Referenties | Coördinator : Compagno, Leonard J.V. | Medewerkers

Compagno, L.J.V., 1984. FAO Species Catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 1 - Hexanchiformes to Lamniformes. FAO Fish. Synop. 125(4/1):1-249. Rome, FAO. (Ref. 247)

Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2025-2 (Global))

  Niet bedreigd (LC) ; Date assessed: 21 November 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaar voor de mens

  Harmless





Gebruik door de mens

Visserij: van geen belang
FAO - Publication: search | FishSource |

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Schattingen op basis van modellen

Gewenste temperatuur (Ref. 123201): 7.1 - 14.6, mean 10 °C (based on 649 cells).
Fylogenetische diversiteitsindex (Ref. 82804):  PD50 = 0.7510   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00263 (0.00132 - 0.00522), b=3.13 (2.94 - 3.32), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
Trofisch niveau (Ref. 69278):  4.2   ±0.73 se; based on food items.
Weerstandsvermogen (Ref. 120179):  laag, minimale populatieverdubbelingstijd 4,5-14 jaar (Fec assumed to be <10).
Kwetsbaarheid van de visserij (Ref. 59153):  Low vulnerability (15 of 100). 🛈
Voedingsstoffen (Ref. 124155):  Calcium = 15.1 [2.2, 91.4] mg/100g; Iron = 0.273 [0.062, 1.162] mg/100g; Protein = 19.1 [17.0, 21.3] %; Omega3 = 0.179 [0.048, 0.671] g/100g; Selenium = 8.32 [1.83, 33.05] μg/100g; VitaminA = 95.1 [10.1, 921.0] μg/100g; Zinc = 0.651 [0.261, 1.877] mg/100g (wet weight);