Common names from other countries
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Siluriformes (Catfishes) >
Loricariidae (Armored catfishes) > Hypostominae
Etymology: Megalancistrus: Greek, megas, megalos = great + Greek, agkistron = hook (Ref. 45335).
More on author: Peters.
Issue
New combination. After examination of the holotype of Pterygoplichthys (Ancistrus) parananus, it is clearly established that Chaetostoma aculeatus belong to the same species and therefore is a junior synonym of this species. Redescription in Pignalberi (1970: 379).
Environment: milieu / climate zone / depth range / distribution range
Sinh thái học
; Nước ngọt gần đáy. Temperate
South America: Paraguay, Paraná and Uruguay River basins.
Length at first maturity / Bộ gần gũi / Khối lượng (Trọng lượng) / Age
Maturity: Lm 17.5  range ? - ? cm
Max length : 58.8 cm SL con đực/không giới tính; (Ref. 56003)
Facultative air-breathing in the genus (Ref. 126274)
Life cycle and mating behavior
Maturities | Sự tái sinh sản | Spawnings | Egg(s) | Fecundities | Ấu trùng
Fisch-Muller, S., 2003. Loricariidae-Ancistrinae (Armored catfishes). p. 373-400. In R.E. Reis, S.O. Kullander and C.J. Ferraris, Jr. (eds.) Checklist of the Freshwater Fishes of South and Central America. Porto Alegre: EDIPUCRS, Brasil. (Ref. 36713)
IUCN Red List Status (Ref. 130435)
CITES (Ref. 128078)
Not Evaluated
Threat to humans
Harmless
Human uses
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01862 (0.01154 - 0.03004), b=3.01 (2.88 - 3.14), in cm Total Length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
Thích nghi nhanh (Ref.
120179): Rất thấp, thời gian nhân đôi của chủng quần tối thiểu là hơn 14 năm (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Moderate to high vulnerability (49 of 100).