Squalus lobularis, Atlantic lobefin dogfish

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Squalus lobularis Viana, Carvalho & Gomes, 2016

Atlantic lobefin dogfish
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Image of Squalus lobularis (Atlantic lobefin dogfish)
Squalus lobularis
Female picture by Viana, S.

Classificatie / Names Populaire namen | Synoniemen | Catalog of Fishes(Genus, Soort(en)) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii (haaien en roggen) (sharks and rays) > Squaliformes (Sleeper and dogfish sharks) > Squalidae (Dogfish sharks)
Etymology: Squalus: Genus name from Latin 'squalus' meaning shark (Ref. 6885, 27436);  lobularis: Name from Latin word 'lobus', referring to its diagnostic broad and lobe-like dorsal and pectoral fins.

Environment: milieu / climate zone / depth range / distribution range Ecologie

; marien benthopelagisch; diepteverspreiding - m (Ref. ), usually - m (Ref. ).   Subtropical; 0°C -

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Southwest Atlantic: from southern Brazil to Uruguay, Patagonia in Argentina where it seems to be more common.

Size / Gewicht / Leeftijd

Maturity: Lm ?  range ? - ? cm
Max length : 64.0 cm TL mannelijk/geslacht niet bekend; (Ref. 109601); 72.5 cm TL (female)

Korte beschrijving Morfologie | Morfometrie

This species is distinguished from its congeners by the following characters: dorsal fins markedly broad and lobe-like and with a short clasper groove, not reaching the rhipidion; differs from S. mitsukurii by having a slender body (vs. highly robust), pectoral-fin posterior margin is concave (vs. straight); interorbital space narrower, 8.8%, 6.8%-8.5% TL (vs. 9.3%, 9.1%-9.8% TL); inner clasper length 1.4 times pelvic-fin inner margin length (vs. 0.7-1.1 times); differs from species of the Squalus megalops group by the having a snout relatively long (vs. short), pectoral fins markedly broad (vs. often very narrow), pectoral free rear tips rounded and lobe-like (vs. often triangular); dermal denticles tricuspidate (vs. lanceolate); further differs from all congeners by having a much larger pectoral-inner margin length (10.5%, 9.2%-11.0% TL), except from S. acanthias (Ref. 109601).

Biologie     Verklarende woordenlijst (b.v. epibenthic)

Life cycle and mating behavior Geslachtsrijpheid | Voortplanting | Kuitschieten | Eieren | Fecundity | Larven

Voornaamste referentie Upload your references | Referenties | Coördinator : Compagno, Leonard J.V. | Medewerkers

de F. Viana, S.T., M.R. De Carvalho and U.L. Gomes, 2016. Taxonomy and morphology of species of the genus Squalus Linnaeus, 1758 from the Southwestern Atlantic Ocean (Chondrichthyes: Squaliformes: Squalidae). Zootaxa 4133(1):1-89. (Ref. 109601)

Status op de Rode Lijst van het IUCN (Ref. 124695)

  Onvoldoende gegevens (DD) ; Date assessed: 09 August 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaarlijk voor mensen

  Harmless





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Estimates based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00933 (0.00347 - 0.02507), b=3.03 (2.80 - 3.26), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic level (Ref. 69278):  4.3   ±0.3 se; based on size and trophs of closest relatives
Weerstandsvermogen (Ref. 120179):  zeer laag, minimale populatieverdubbelingstijd meer dan 14 jaar (Preliminary K or Fecundity.).
Kwetsbaarheid (Ref. 59153):  High to very high vulnerability (67 of 100) .