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Siluriformes (Catfishes) >
Lacantuniidae (Chiapas catfishes)
Etymology: Lacantunia: Named for Rio Lacantún in Chiapas, the tributary river of Rio Usumacinta inhabited by the new catfish; enigmatica: From the Latin name 'enigmatica' = baffling or inexplicable, for the unexpected discovery, obscure relationships and origin..
Environment: milieu / climate zone / depth range / distribution range
Sinh thái học
; Nước ngọt Tầng nổi; Mức độ sâu 0 - 18 m (Ref. 54757). Tropical
North America: Mexico.
Bộ gần gũi / Khối lượng (Trọng lượng) / Age
Maturity: Lm ? range ? - ? cm
Max length : 42.7 cm SL con đực/không giới tính; (Ref. 54757); 40.6 cm SL (female)
Short description
Khóa để định loại | Hình thái học | Sinh trắc học
Các tia vây lưng cứng (tổng cộng) : 2; Các vây lưng mềm (tổng cộng) : 8 - 10; Tia cứng vây hậu môn: 0. This species is distinguished from all other siluriforms by the following uniquely derived and anatomically complex characteristics: fifth infraorbital bone relatively wide and thick-walled, boomerang-shaped and anteriorly convex, and remote from a markedly prominent sphenotic process; the lateral margin of skull thickened along frontal bone and adjacent parts of lateral ethmoid and sphenotic bones at origins of much enlarged adductor mandibulae and levator arcus palatini muscles, otherwise the skull roof medial to muscle origins severely constricted, flat, lacking crests and fossae; a pair of cone-shaped "pseudo-pharyngobranchial" bones at anterior tips of enlarged accessory cartilages medial to first and second epibranchials; a hypertrophied, axe-shaped uncinate process on third epibranchial; gas bladder with paired spherical, unencapsulated diverticulae protruding from anterodorsal wall (Ref. 54757).
Inhabits deep river channels and pools with rocks and strong eddy currents. sometimes taken in stream mouths; collected in both high and low water seasons, and generally during the night. Food include fishes, crabs, prawns, and large and tough seeds (Ref. 54757).
Life cycle and mating behavior
Maturities | Sự tái sinh sản | Spawnings | Egg(s) | Fecundities | Ấu trùng
Rodiles-Hernández, R., D.A. Hendrickson, J.G. Lundberg and J.M. Humphries, 2005. Lacantunia enigmatica (Teleostei: Siluriformes) a new and phylogenetically puzzling freshwater fish from Mesoamerica. Zootaxa 1000:1-24. (Ref. 54757)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
Các công cụ
Special reports
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 1.5000 [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).
Mức dinh dưỡng (Ref.
69278): 3.3 ±0.54 se; based on food items.
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (41 of 100).
