Klassifizierung / Names
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Siluriformes (Catfishes) >
Loricariidae (Armored catfishes) > Hypoptopomatinae
Etymology: biamnicus: Derived from the Latin bi, meaning two, and amnicus, meaning inhabitant of a river, in allusion to the fact that the species is distributed in both the Iguaçu and Tibagi basins. A noun in apposition.
Umwelt: Milieu / Klimazone / Tiefenbereich / Verbreitungsgebiet
Ökologie
; süßwasser demersal. Tropical
South America: tributaries to rio Iguaçu, in Santa Catarina and Paraná States, and to the rio Tibagi, Paraná State, both in rio Paraná basin, Brazil.
Größe / Gewicht / Alter
Geschlechtsreife: Lm ? range ? - ? cm
Max length : 4.0 cm SL Männchen/unbestimmt; (Ref. 93039)
Rückenflossenstacheln (insgesamt) : 2; Rückenflossenweichstrahlen (insgesamt) : 6 - 7; Afterflossenstacheln: 1; Afterflossenweichstrahlen: 5; Wirbelzahl: 28. Can be diagnosed from its congeners by having shorter pectoral-fin spine length (18.6-21.3 vs. 21.4-30.4% SL in remaining species). Additional characters useful for its identification include lower caudal peduncle (7.6-9.0 vs. 9.3-11.0 in Otothyropsis marapoama and 9.7-11.5% SL in Otothyropsis piribebuy), deeper caudal peduncle (7.6-9.0 vs. 6.2-7.6% SL in Otothyropsis polyodon); and dorsal-fin spinelet triangular in shape (vs. spinelet rectangular or quadrangular) (Ref. 93039).
Body shape (shape guide): elongated.
Commensal with midge larvae (Chironomidae) which are attached to the gill opening or more rarely to the posterior process of the cleithrum (Ref. 93039).
Lebenszyklus und Paarungsverhalten
Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fruchtbarkeit | Larven
Calegari, B.B., P. Lehmann A. and R.E. Reis, 2013. Two new species of cascudinhos of the genus Otothyropsis (Siluriformes: Hypoptopomatinae) from the rio Paraná basin, Brazil. Zootaxa 3619(2):130-144. (Ref. 93039)
IUCN Rote Liste Status (Ref. 130435: Version 2025-2 (Global))
Bedrohung für Menschen
Harmless
Nutzung durch Menschen
Tools
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Schätzungen auf der Grundlage von Modellen
Phylogenetischer Diversitätsindex (Ref.
82804): PD
50 = 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00977 (0.00434 - 0.02202), b=3.06 (2.87 - 3.25), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Widerstandsfähigkeit (Ref.
120179): hoch, Verdopplung der Population dauert weniger als 15 Monate. (Preliminary K or Fecundity.).
Anfälligkeit der Fischerei (Ref.
59153): Low vulnerability (10 of 100).
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