Carcharhinus obsoletus, Lost shark

Carcharhinus obsoletus White, Kyne & Harris, 2019

Lost shark
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Image of Carcharhinus obsoletus (Lost shark)
Carcharhinus obsoletus
Female Afbeelding van White et al., 2019

Classificatie / Namen Lokale namen | Synoniemen | Catalog of Fishes(Genus, Soort(en)) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii (haaien en roggen) (sharks and rays) > Carcharhiniformes (Ground sharks) > Carcharhinidae (Requiem sharks)
Etymology: Carcharhinus: karcharos (Gr.), sharp or jagged; rhinus, an ancient name for sharks, from rhine (Gr.), rasp, both words alluding to a shark's jagged, rasp-like skin (See ETYFish); obsoletus: Latin for extinct, referring to fact that it has not been recorded since 1934 [originally spelled obsolerus, a misspelling based on incorrect optical character recognition results at several online English-Latin translation sites] (See ETYFish).

Milieu: milieu / Klimaatzone / Diepte / verspreidingsgebied Ecologie

marien demersaal. Tropical

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Western Pacific: collection records Gulf of Thailand, Vietnam and Malaysia (Borneo). Distribution is actually uncertain, with Baram in Sarawak (Malaysia) likely an accurate collection locality.

Grootte / Gewicht / Leeftijd

Maturiteit: Lm ?  range ? - ? cm
Max length : 43.3 cm TL (female)

Korte beschrijving Determinatiesleutels | Morfologie | Morfometrie

Wervels: 117 - 120. This small species is characterized by the following characters: a slender body and tail; no interdorsal ridge; in dorsal view head parabolic and is relatively wide, interorbital space 11.2-12.0% TL; eyes relatively large, its length 2.4-2.9% TL, 10.0-15.1 times in head length; row of enlarged hyomandibular pores alongside each mouth corner absent; upper anterior teeth broadly triangular and serrated, with large and coarse (non-lobate) serrations basally; lower anterior teeth with narrower, mostly straight cusps; the cusps of upper and lower anterolateral teeth with apical margin slightly recurved; lateral cusplets absent; total tooth row counts 27-31/26-29; posterior edge of mandibular plate with an elongate and crescentic indentation; second dorsal-fin origin well posterior of anal-fin origin, about opposite anal-fin midbase, while second dorsal-fin origin to anal-fin origin 1.3-2.5% TL, 0.3-0.6 times second dorsal-fin base; first dorsal-fin triangular, non-falcate, origin about opposite first third of pectoral-fin inner margin length, free rear tip just anterior to pelvic-fin origins, length 1.7-1.9 times height, inner margin 1.9-2.5 in base; second dorsal fin is much smaller than first, slightly smaller than anal fin, base 1.4-2.0 times height, height 22-31% of first dorsal-fin height; anal fin height 1.2-1.5 times second dorsal height, base 1.1-1.2 times second dorsal-fin base; total vertebral counts 117-120, monospondylous precaudal 36-40, diplospondylous precaudal 18-19, diplospondylous caudal 56-66, precaudal 54-58; absence of distinct black markings on fins (Ref. 119369).
Cross section: angular.

Biologie     Verklarende woordenlijst (bv. epibenthic)

Maximum length (43.3 cm TL) is that of a juvenile female; size at birth likely close to 34.0 cm TL, since late-term embryo was fully developed and a 37.0 cm TL juvenile had a faint umbilical sca (Ref. 119369).

Levenscyclus en paargedrag Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven

Hoofdreferentie Upload uw referenties | Referenties | Coördinator : Compagno, Leonard J.V. | Medewerkers

White, W.T., P.M. Kyne and M. Harris, 2019. Lost before found: A new species of whaler shark Carcharhinus obsolerus from the Western Central Pacific known only from historic records. PLoS ONE 14(1):e0209387. (Ref. 119369)

Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2025-2 (Global))

  Ernstig bedreigd (CR) (A2d; D); Date assessed: 12 September 2020

CITES

Appendix II: International trade monitored

CMS (Ref. 116361)

Not Evaluated

Gevaar voor de mens

  Harmless





Gebruik door de mens

FAO - Publication: search | FishSource |

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Schattingen op basis van modellen

Fylogenetische diversiteitsindex
(Ref. 82804) 		PD50 = 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).
Trofisch niveau
(Ref. 69278) 		3.8   ±0.5 se; based on size and trophs of closest relatives
Weerstandsvermogen
(Ref. 120179) 		laag, minimale populatieverdubbelingstijd 4,5-14 jaar (Few large pups (RF)).
Kwetsbaarheid van de visserij
(Ref. 59153) 		Low vulnerability (24 of 100). 🛈