Elasmobranchii (haaien en roggen) (sharks and rays) >
Carcharhiniformes (Ground sharks) >
Dichichthyidae (Bristle shark)
Etymology: Dichichthys: Name from the combination of the Greek 'dicho'- meaning 'to branch in two' and 'ichthys' for 'fish', with this genus being intermediate between the Galeus-Parmaturus complex and Apristurus; nigripalatum: nigra (L.), black or dark; palatum (L.), palate, referring to distinctive blackish color of roof of mouth (See ETYFish).
Milieu: milieu / Klimaatzone / Diepte / verspreidingsgebied
Ecologie
marien bathydemersaal; diepte 170 - 190 m (Ref. 119153). Tropical
Eastern Indian Ocean: Indonesia (Sumbawa I.); possibly be more widespread in the region.
Grootte / Gewicht / Leeftijd
Maturiteit: Lm ? range ? - ? cm
Max length : 54.8 cm TL mannelijk / geslacht onbekend; (Ref. 119153)
Korte beschrijving
Determinatiesleutels | Morfologie | Morfometrie
This moderate-sized species is distinguished by the following characters: slender body has soft-velvety skin, where dermal denticles on side and upper body are tricuspidate; coloration of body uniformly plain medium brown; head slightly depressed; snout is relatively short; mouth curved, the upper and lower labial furrows are conspicuous with the uppers and lowers of equal lengths; roof of mouth blackish with darker pores; teeth are mainly tricuspidate with greatly elongate median cusps, about 50 rows in both jaws; origin of the first dorsal fin is posterior to the insertion of the pelvic fins, pre-first dorsal fin is slightly posterior of body mid-length; origin of the second dorsal fin is posterior to mid-length of anal fin base; pelvic fins origin and vent are slightly posterior to midlength; second dorsal fin is slightly larger than first; caudal peduncle is relatively short, pronounced caudal crests on upper and lower anterior caudal fin margins has enlarged denticles; vertebral counts monospondylous centra 42, precaudal centra 90 (Ref. 119153).
Body shape (shape guide): elongated; Cross section: oval.
Levenscyclus en paargedrag
Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven
White, W.T., A.L. Stewart, H.L. O’Neill and G.J.P. Naylor, 2024. Dichichthyidae, a new family of deepwater sharks (Carcharhiniformes) from the Indo–West Pacific, with description of a new species. Fishes 2024, 9, 121. (Ref. 130868)
Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2025-2 (Global))
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Harmless
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Schattingen op basis van modellen
Fylogenetische diversiteitsindex (Ref.
82804): PD
50 = 0.5625 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
Trofisch niveau (Ref.
69278): 3.9 ±0.5 se; based on size and trophs of closest relatives
Kwetsbaarheid van de visserij (Ref.
59153): Moderate vulnerability (42 of 100).
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