أشلاق (القروش و الشفانين) (sharks and rays) >
Squatiniformes (Angel sharks) >
Squatinidae (Angel sharks)
Etymology: Squatina: Latin for skate, which angel sharks superficially resemble, presumably tautonymous with Squalus squatina Linnaeus 1758 (no species mentioned). (See ETYFish); heteroptera: Name refers to the obvious difference in size, shape and area of the two dorsal fins..
Issue
Synonym of Squatina dumeril according to (Weigmann, 2016, Ref. 106604).
Environment: milieu / climate zone / depth range / distribution range
البيئة
بحري القاع; نطاق العمق ? - 164 m (Ref. 74686). Tropical
Western Atlantic: Gulf of Mexico.
الحجم / وزن / العمر
Maturity: Lm ? range ? - ? cm
Max length : 49.0 cm TL ذكر/ مختلط الجنس; (Ref. 74686)
وصف مختصر
مفاتيح التعريف | الوصف الخارجي | قياسات المظهر الخارجي
This species has no thorns nor enlarged denticles on the mean dorsal line. The dermal denticles has 4 keels extending posteriorly, its widest base, approximately twice its length. Dorsal fins are very different in size, shape and area, with their base about half their height. Nasal lobes are simple and similar in length; the first and last are spatula-like in shape; the central part irregularly quadrangular. its edge with several lobes. General body color is dark brown at the dorsal surface, ocelli absent, but with 2 distinct round black spots on the upper edge of the pectoral fins and with irregular, scattered whitish spots. Each side of jaws with 8 triangular, non-serrated, and straight teeth, the upper with 2 functional series, the lower with only one (Ref. 74686).
Life cycle and mating behavior
Maturities | التكاثر | Spawnings | Egg(s) | Fecundities | Larvae
Castro-Aguirre, J.L., H.S. Espinosa Pérez and L. Huidobro Campos, 2006. Dos nuevas especies del género Squatina (Chondrichthyes: Squatinidae) del Golfo de México. Rev. Biol. Trop. (Int. J. Trop. Biol.) [2006] 54 (3):1031-1040. (Ref. 74686)
IUCN Red List Status (Ref. 130435)
استخدامات بشرية
أدوات
تقارير خاصة
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مصادر علي الأنترنت
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00676 (0.00293 - 0.01558), b=3.07 (2.88 - 3.26), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
مستوى غذائي (Ref.
69278): 3.8 ±0.5 se; based on size and trophs of closest relatives
المرونه (Ref.
120179): منخفض, الحد الزمني الأدني لتضاعف عدد أفراد المجتمع 4.5-14 سنة (Preliminary low fecundity).
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (39 of 100).
