Elasmobranquios (tiburones y rayas) (sharks and rays) >
Myliobatiformes (Stingrays) >
Gymnuridae (Butterfly rays)
Etymology: Gymnura: Greek, gymnos = naked + Greek, oura = tail (Ref. 45335).
Eponymy: Alfred Herbert Crook (d: 1873) was a biologist and Headmaster of Queen’s College, Hong Kong (1925–1930), who also lectured on biology at the Hong Kong College of Medicine. [...] (Ref. 128868), visit book page.
More on author: Fowler.
Environment: milieu / climate zone / depth range / distribution range
Ecología
marino demersal. Subtropical
Distribución
Países | Áreas FAO | Ecosistemas | Ocurrencias, apariciones | Point map | Introducciones | Faunafri
Northwest Pacific: known from the type locality, Kowloon, China. Not in Compagno's 1999 checklist (Ref. 35766).
Tamaño / Peso / Age
Maturity: Lm ?  range ? - ? cm
Ovoviviparous (Ref. 50449). Better reference needed.
Life cycle and mating behavior
Madurez | Reproducción | Puesta | Huevos | Fecundidad | Larva
Exhibit ovoviparity (aplacental viviparity), with embryos feeding initially on yolk, then receiving additional nourishment from the mother by indirect absorption of uterine fluid enriched with mucus, fat or protein through specialised structures (Ref. 50449). Distinct pairing with embrace (Ref. 205).
Eschmeyer, W.N. (ed.), 1999. Catalog of fishes. Updated database version of November 1999. Catalog databases as made available to FishBase in November 1999. (Ref. 33021)
IUCN Red List Status (Ref. 130435: Version 2024-2)
Threat to humans
Harmless
Human uses
Herramientas
Special reports
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Fuentes de Internet
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00776 (0.00351 - 0.01718), b=3.09 (2.89 - 3.29), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Nivel trófico (Ref.
69278): 3.8 ±0.6 se; based on size and trophs of closest relatives
Resiliencia (Ref.
120179): Muy bajo, población duplicada en un tiempo mínimo superior a 14 años (Fec assumed to be <10).
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (43 of 100).