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Ovalentaria/misc (Various families in series Ovalentaria) >
Opistognathidae (Jawfishes)
Etymology: Opistognathus: Greek, opisthe = behind + Greek, gnathos = jaw (Ref. 45335); to the very elongate upper jaw of the type species of the genus, Opistognathus nigromarginatus (Ref. 128653); adelus: Name from the Greek 'adelos' meaning dim or obscure; refers to the uncertain phylogenetic relationships of this jawfish.
Environnement : milieu / zone climatique / profondeur / gamme de distribution
Écologie
marin pelagic-neritic; profondeur 5 - 65 m (Ref. 85161). Tropical
Western Indian Ocean: South Africa and northwest Madagascar.
Taille / Poids / Âge
Maturité: Lm ? range ? - ? cm
Max length : 4.9 cm SL mâle / non sexé; (Ref. 85161)
Description synthétique
Clés d'identification | Morphologie | Morphométrie
Épines dorsales (Total) : 6; Rayons mous dorsaux (Total) : 13 - 14; Épines anales: 3; Rayons mous anaux: 13 - 14; Vertèbres: 27 - 28. This species is distinguished by the following set of characters: upper jaw is broadly rounded with a large oval-shaped supramaxilla, and maxilla with a flexible lamina posteriorly, extending 1.0-1.2 eye diameters behind posterior margin of orbit; D XI,13-14; dark blotch on posterior angle of jaws, including inner lining of maxilla and adjacent membranes; no ocellus or large dark blotches on dorsal fin; no vomerine teeth (Ref. 85161). Expanded diagnostics: infraorbitals relatively robust, 2nd and 3rd infraorbitals with large sensory canal openings, 3rd infraorbital with no suborbital shelf; A III, 13-14; vertebrae 10+17-18; scale rows in horizontal series about 40-41; gill raker 9+15-16 in adults (except 6+14 in two juveniles, 21.0-23.0 mm SL); posterior angle of jaws and adjacent membranes with a dark blotch that is visible externally; spinous dorsal
fin with no anterior ocellus or dark blotches; pelvic and anal fins are dark, the latter with pale margin (Ref.128653).
Body shape (shape guide): elongated.
Cycle de vie et comportement reproducteur
Maturité | Reproduction | Frai | Œufs | Fécondité | Larves
Smith-Vaniz, W.F., 2023. Review of Indo-West Pacific jawfishes (Opistognathus: Opistognathidae), with descriptions of 18 new species. Zootaxa 5252(1):1-180. (Ref. 128653)
Statut dans la liste rouge de l'IUCN (Ref. 130435: Version 2025-2 (Global))
Menace pour l'homme
Harmless
Utilisations par l'homme
Outils
Articles particuliers
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Sources Internet
Estimations basées sur des modèles
Température préférée (Réf.
123201): 23.9 - 27.5, mean 26.2 °C (based on 42 cells).
Indice de diversité phylogénétique (Réf.
82804): PD
50 = 0.5000 [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).
Niveau trophique (Réf.
69278): 3.3 ±0.5 se; based on size and trophs of closest relatives
Vulnérabilité de la pêche (Ref.
59153): Low vulnerability (10 of 100).
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