Psalidodon henseli

Psalidodon henseli (de Melo & Buckup, 2006)

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> Characiformes (Characins) > Acestrorhamphidae (American tetras) > Acestrorhamphinae
Etymology: Psalidodon: Greek, psalis, -idos = scissors + Greek, odous = teeth (Ref. 45335)henseli: Named for R. Hensel, for his contributions to ichthyology in southern Brazil.
Eponymy: Reinhold Friedrich Hensel (1826–1881) was a German naturalist, ichthyologist and paleontologist. [...] (Ref. 128868), visit book page.

Taxonomic Remarks
Hensel (1870) described Tetragonopterus aeneus as a new species from Porto Alegre, Southern Brazil, however, it is a junior homonym of that of Günther (1860) whose specimens were taken from Oaxaca, Mexico. Steindachner later listed this as a synonym of T. rutilus Jenyns 1842, along with T. obscurus Hensel 1870. Later, Eigenmann (1921:293) listed T. rutilus, T. aeneus Günther and T. aeneus Hensel as junior synonyms of A. fasciatus Cuvier 1819. The obvious homonymy was obscured when Eigenmann placed T. aeneus of Günther as synonym of Astyanax fasciatus aeneus and that of Hensel as synonym of A. fasciatus fasciatus. Through most of the 20th century T. aeneus remained as synonym of A. fasciatus or has been treated as a species of uncertain status. Some authors maintained the association between T. obscurus and T. aeneus Hensel, and used the former as the valid name. F. de Melo and P. Buckup revalidated and redescribed T. aeneus Hensel to avoid homonymy, and gave the new name Astyanax henseli (Ref. 56653).

Milieu: milieu / Klimaatzone / Diepte / verspreidingsgebied Ecologie

; zoet water pelagisch. Tropical

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South America: Southern Brazil.

Lengte bij maturiteit / Grootte / Gewicht / Leeftijd

Maturiteit: Lm 6.0, range 2 - 11.008 cm
Max length : 11.1 cm SL mannelijk / geslacht onbekend; (Ref. 116915)

Korte beschrijving Determinatiesleutels | Morfologie | Morfometrie

Dorsale zachte stralen (totaal) : 10 - 11; Anale zachte stralen: 25 - 33. Diagnosis: Distinguished from its congeners except A. saguazu and A. elachylepis by the presence of a second vertically elongate humeral spot (vs. one humeral spot). It differs from saguazu, elachylepis, and fasciatus species complex by the autapomorphic presence of a space between the dentary teeth, which are relatively slender, with cusps positioned close to one another, and by the presence of a maximum of five cusps in each dentary tooth (vs. maximum of 7 cusps). Differs from fasciatus, rutilus, and elachylepis by the presence of 2 - 5, usually 5, tricuspid teeth on the anterior margin of maxilla (vs. 1 - 2 teeth, usually 1, on anterior margin of maxilla) (Ref. 56653).
Body shape (shape guide): fusiform / normal.

Biologie     Verklarende woordenlijst (bv. epibenthic)

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

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de Melo, F.A.G. and P.A. Buckup, 2006. Astyanax henseli, a new name for Tetragonopterus aeneus Hensel, 1870 from southern Brazil (Teleostei: Characiformes). Neotrop. Ichthyol. 41(1):45-52. (Ref. 56653)

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 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01148 (0.00659 - 0.02000), b=3.11 (2.97 - 3.25), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref. 93245).
Trofisch niveau (Ref. 69278):  3.0   ±0.3 se; based on size and trophs of closest relatives
Weerstandsvermogen (Ref. 120179):  Hoog, minimale populatieverdubbelingstijd minder dan 15 maanden (Preliminary K or Fecundity.).
Kwetsbaarheid van de visserij (Ref. 59153):  Low vulnerability (10 of 100). 🛈