Elasmobranchi (squali e razze) (sharks and rays) >
Heterodontiformes (Bullhead and horn sharks) >
Heterodontidae (Bullhead, horn, or Port Jackson sharks)
Etymology: Heterodontus: heteros (Gr.), different; odontos (Gr.), tooth, referring to pointy teeth (for clutching prey) at front of jaws, different than rounded molar-like teeth (for grinding hard-shelled invertebrates) at the back (See ETYFish); ramalheira: In honor of João Ramalheira, captain of the trawler from which holotype was collected, and “who has brought in much valuable scientific material” [presumably a noun in apposition, without the patronymic “i”] (See ETYFish).
More on author: Smith.
Ambiente: milieu / zona climatica / distribuzione batimetrica / gamma di distribuzione
Ecologia
marino demersale; distribuzione batimetrica 40 - 305 m (Ref. 106604), usually 100 - ? m (Ref. 43278). Deep-water; 22°N - 26°S, 30°E - 60°E
Western Indian Ocean: off southern Mozambique and Natal, South Africa (Ref. 5578), also off the eastern shore of the Arabian Peninsula.
Dimensione / Peso / Età
Maturità: Lm ?  range ? - ? cm
Max length : 64.0 cm TL maschio/sesso non determinato; (Ref. 247); 83.0 cm TL (female)
Spine dorsali (totale) : 2; Spine anali: 0. Dark red-brown with scattered white spots (Ref. 6576).
Body shape (shape guide): elongated.
Found on the outer continental shelf and uppermost slopes (Ref. 247, 43278). Benthic (Ref. 43278). Feeds on crabs (Ref. 5578, 43278). Oviparous (Ref. 50449).
Ciclo vitale e comportamento di accoppiamento
Maturità | Riproduzione | Deposizione | Uova | Fecondità | Larve
Oviparous (Ref. 50449). Distinct pairing with embrace (Ref. 205).
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)
Stato della Lista Rossa IUCN (Ref. 130435: Version 2025-2 (Global))
Minaccia per l'uomo
Traumatogenic
Usi umani
Pesca: di nessun interesse; Acquario: Acquari pubblici
Strumenti
Rapporti speciali
Scarica XML
Fonti Internet
Stime basate su modelli
Indice di diversità filogenetica (Fonte Biblio. 82804) |
PD50 = 0.5029 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00372 (0.00160 - 0.00864), b=3.15 (2.94 - 3.36), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
Livello trofico (Fonte Biblio. 69278) |
3.5 ±0.60 se; based on food items. |
Resilienza (Fonte Biblio. 120179) |
Basso, tempo minimo di raddoppiamento della popolazione 4.5 - 14 anni (Fec assumed to be <100). |
Vulnerabilità della pesca (Ref. 59153) |
High vulnerability (60 of 100). 🛈 |