Elasmobranchi (squali e razze) (sharks and rays) >
Rajiformes (Skates and rays) >
Arhynchobatidae (Softnose skates)
Etymology: Notoraja: Greek, noton = back + Latin, raja = fish, Raja sp. (Ref. 45335); longiventralis: Name from Latin 'longi' for long and 'ventralis'; referring to the very long anterior lobe of the pelvic fin.
Ambiente: milieu / zona climatica / distribuzione batimetrica / gamma di distribuzione
Ecologia
marino batipelagico; distribuzione batimetrica 660 - 953 m (Ref. 91035). Tropical; 14°S - 20°S, 166°E - 178°W (Ref. 114953)
Western Pacific: Fiji and Vanuatu.
Dimensione / Peso / Età
Maturità: Lm ? range ? - ? cm
Max length : 43.4 cm TL maschio/sesso non determinato; (Ref. 91035)
Breve descrizione
Chiavi di identificazione | Morfologia | Morfometria
This species (probably of medium size) is distinguished by the following set of characters: presence of a single rudimentary preorbital thorn; velvety dorsal and ventral surfaces of disc which are covered with fine denticles; long and slender tail is velvety and without enlarged thorns; lateral tail folds are not expanded distally, always narrower than tail width; nasal lobes not greatly expanded, width of nasal curtain 7.6-8.0% TL; relatively broad mouth, its width more than 66% of maximum width of nasal curtain; anterior pelvic-fin lobe is longer than posterior lobe; dorsal and ventral surfaces are dark, almost uniformly purplish grey; faint whitish spots over pores along the anterior margins of disc; total pectoral-fin radials 64-65, monospondylous centra 26-27, total diplospondylous centra 109-118, total number of centra 135-145 (Ref. 91035).
Body shape (shape guide): other (see remarks); Cross section: flattened.
A demersal species found on mid-insular slopes. Known from few specimens. Hatching size at ca. 17 cm TL. Life history unknown (Ref. 114953).
Ciclo vitale e comportamento di accoppiamento
Maturità | Riproduzione | Deposizione | Uova | Fecondità | Larve
Séret, B. and P.R. Last, 2012. New deep water skates of the genus Notoraja Ishiyama, 1958 (Rajoidei, Arhynchobatidae) from the southwest Pacific. Zoosystema, 34 (2):319-341. (Ref. 91035)
Stato della Lista Rossa IUCN (Ref. 130435: Version 2025-2 (Global))
Minaccia per l'uomo
Harmless
Usi umani
Strumenti
Rapporti speciali
Scarica XML
Fonti Internet
Stime basate su modelli
Temperatura preferita (Fonte Biblio.
123201): 1.8 - 2.7, mean 2.2 °C (based on 1549 cells).
Indice di diversità filogenetica (Fonte Biblio.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00550 (0.00279 - 0.01081), b=3.11 (2.94 - 3.28), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Livello trofico (Fonte Biblio.
69278): 3.7 ±0.7 se; based on size and trophs of closest relatives
Resilienza (Fonte Biblio.
120179): Medio, tempo minimo di raddoppiamento della popolazione 1.4 - 4.4 anni (Preliminary K or Fecundity.).
Vulnerabilità della pesca (Ref.
59153): Low to moderate vulnerability (33 of 100).
🛈
