Pygidianops amphioxus

Pygidianops amphioxus de Pinna & Kirovsky, 2011

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drawing shows typical species in Trichomycteridae.

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> Siluriformes (Catfishes) > Trichomycteridae (Pencil or parasitic catfishes) > Glanapteryginae
Etymology: Pygidianops: Greek, pyge = rump + Gree, ops = appearance (Ref. 45335)amphioxus: The specific name, a noun in apposition, refers to the cephalochordate amphioxus (a common name that applies to Recent cephalochordates in general, now mostly included in the genus Branchiostoma), in allusion to obvious similarities in body shape and superficial aspect (Ref. 87858).

Milieu: milieu / Klimaatzone / Diepte / verspreidingsgebied Ecologie

; zoet water benthopelagisch. Tropical; 0°S - 4°S, 56°W - 65°W

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South America: Brazil. Pygidianops amphioxus has the broadest reported distribution of any glanapterygine species yet known, spanning over 900 km in straight line. Its westernmost record is the rio Daraá, tributary of the upper rio Negro, and its eastern limit is an affluent to the rio Nhamundá, a northern Amazonian tributary just west of the rio Trombetas. Within the Ducke Preserve, the species occurs in igarapé do Acará and igarapé Tinga (Soares-Carvalho, 2010), which belong to two distinct systems. The igarapé do Acará opens on the rio Tarumã, which is a tributary to the lower rio Negro; while the igarapé Tinga is part of the rio Puraquequara which opens directly into the rio Amazonas. In all cases, P. amphioxus is restricted to lowland terra firme rivers on the northern Amazonian versant. This suggests some association with the Guiana Shield, a link further highlighted by the close relationship of P. amphioxus to P. magoi, from the río Orinoco. However, at this time it is premature to speculate further on the significance of that association. It is likely that current distributional data are still incomplete and that the species will be found in many other localities as suitable microhabitats are more thoroughly sampled (Ref. 87858).

Grootte / Gewicht / Leeftijd

Maturiteit: Lm ?  range ? - ? cm
Max length : 3.0 cm SL mannelijk / geslacht onbekend; (Ref. 87858); 2.6 cm SL (female)

Biologie     Verklarende woordenlijst (bv. epibenthic)

Levenscyclus en paargedrag Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven

Hoofdreferentie Upload uw referenties | Referenties | Coördinator : Pinna, Mário de | Medewerkers

de Pinna, M.C.C. and A.L. Kirovsky, 2011. A new species of sand-dwelling catfish, with a phylogenetic diagnosis of Pygidianops Myers (Siluriformes: Trichomycteridae: Glanapteryginae). Neotrop. Ichthyol. 9(3):493-504. (Ref. 87858)

Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2025-2 (Global))

  Niet bedreigd (LC) ; Date assessed: 07 November 2018

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaar voor de mens

  Harmless





Gebruik door de mens

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Schattingen op basis van modellen

Fylogenetische diversiteitsindex
(Ref. 82804)
PD50 = 0.5625 [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).
Trofisch niveau
(Ref. 69278)
3.1   ±0.3 se; based on size and trophs of closest relatives
Kwetsbaarheid van de visserij
(Ref. 59153)
Low vulnerability (10 of 100). 🛈