Classification / Names
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Siluriformes (Catfishes) >
Cetopsidae (Whale catfishes) > Cetopsinae
Etymology: Cetopsidium: From Cetopsis, the first genus proposed in subfamily Cetopsinae, and 'idium' meaning diminutive, referring to the relatively small body sizes of the members of the genus; ferreirai: Named for Efren J.G. Ferreira of the Instituto Nacional de Pesquisas da Amazonia (INPA), in recognition of his contributions to the knowledge of the fishes of the Brazilian Amazon.
Eponymy: Dr Efrem Jorge Gondim Ferreira (d: 1954) is a Brazilian ichthyologist, who is a Senior Researcher III at Instituto Nacional de Pesquisas da Amazônia, Manaus, and Professor of the Postgraduate Programme in Fresh Water Biology and Inland Fisheries. [...] (Ref. 128868), visit book page.
More on authors: Vari, Ferraris & dePinna.
Environment: milieu / climate zone / depth range / distribution range
Ecología
; agua dulce bentopelágico. Tropical
Distribución
Países | Áreas FAO | Ecosistemas | Ocurrencias, apariciones | Point map | Introducciones | Faunafri
South America: Rio Trombetas, left bank tributary of the lower rio Amazonas, Brazil.
Tamaño / Peso / Age
Maturity: Lm ? range ? - ? cm
Max length : 3.7 cm SL macho / no sexado; (Ref. 56045)
Short description
Claves de identificación | Morfología | Morfometría
Radios blandos dorsales (total) : 5 - 6; Radios blandos anales: 23 - 24; Vértebra: 39 - 40. Distinguished from all its congeners, possibly except for Cetopsidium roae and C. minutum, by lacking distal filaments on the first rays of the dorsal and pectoral fins in adults males. Differs from C. minutum in the length of the pelvic fin by not reaching anal-fin origin. Further differs from C. morenoi in the overall form of the head, being not massive proportionally as a consequence of the less extensive development of the adductor mandibulae muscle onto the dorsal surface of head and with the snout distinctly rounded, and the less extensive dark pigmentation on the body (near absence of dark pigmentation on the lateral surface of body and the pigmentation limited to the middorsal region of body). Differs from C. orientale in the alignment of the dorsal and ventral profiles of the portion of the body posterior of the base of the dorsal fin (profiles converging posteriorly) and in the overall coloration (limited dark pigmentation located largely along the middorsal region of the body). Distinguished from C. pemon by having profile of head anteriorly rounded and by having proportional length of the snout, approximately 2 times diameter of the eye. Differs from C. roae in the position of the vent, proximate to the base of the anterior most anal-fin ray (Ref. 56045).
Life cycle and mating behavior
Madurez | Reproducción | Puesta | Huevos | Fecundidad | Larva
Vari, R.P., C.J. Ferraris Jr. and M.C.C. de Pinna, 2005. The neotropical whale catfishes (Siluriformes: Cetopsidae: Cetopsinae), a revisionary study. Neotrop. Ichthyol. 3(2):127-238. (Ref. 56045)
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 = 0.5078 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00501 (0.00207 - 0.01214), b=3.14 (2.93 - 3.35), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Nivel trófico (Ref.
69278): 3.3 ±0.4 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
