Classification / Names
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Characiformes (Characins) >
Acestrorhamphidae (American tetras) > Stygichthyinae
Etymology: pelecus: From the Greek pelekus, meaning axe, in allusion to the form of the dark pigmentation resulting from the junction of the humeral spot with the black midlateral stripe.
Environment: milieu / climate zone / εύρος βάθους / distribution range
Οικολογία
; Γλυκού νερού βενθοπελαγικό; εύρος βάθους 0 - 1 m (Ref. 57404). Tropical
South America: Rio Pardo drainage in Bahia, Brazil.
Μέγεθος / Βάρος / Age
Γεννητική Ωρίμανση: Lm ? range ? - ? cm
Max length : 6.0 cm SL αρσενικό/απροσδιόριστο; (Ref. 57404)
Short description
Κλείδες προσδιορισμού | Μορφολογία | Μορφομετρία
Σπόνδυλοι: 35. Distinguished from its congeners by the following combination of characters: body depth 26.7-34.8% SL, short but pointed snout, that is smaller than the orbital diameter, and anal fin with 16-18 branches rays. Differs from other members of the genus in its distinctive color pattern: with only one humeral spot limited to the region above lateral line series, and has a conspicuous midlateral body stripe extending from the upper margin of opercle to the caudal-fin base, a putative autapomorphy of this species (Ref. 57404).
Body shape (shape guide): fusiform / normal; Cross section: compressed.
The type locality during dry season is about 10-20 m wide large river, with clear water, 0.1-1.0 m deep, alternating lentic stretches and rapids, with riparian vegetation including grasses and with bottom consisting of stones, rocks, sand and mud (Ref. 57404).
Life cycle and mating behavior
Γεννητική Ωρίμανση | Αναπαραγωγή | Γεννοβολία | Αβγά | Γονιμότητα | Προνύμφες
Terán, G.E., M.F. Benitez and J.M. Mirande, 2020. Opening the Trojan house: phylogeny of Astyanax, two genera and resurrection of Psalidodon (Teleostei: Characidae). Zool. J. Lin. Soc. 190(4):1217-1234. (Ref. 123753)
IUCN Red List Status (Ref. 130435: Version 2025-1)
Threat to humans
Harmless
Human uses
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Διαδικτυακές πηγές
Estimates based on models
Phylogenetic diversity index (Αναφ.
82804): PD
50 = 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01096 (0.00498 - 0.02415), b=3.09 (2.92 - 3.26), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
Τροφικό Επίπεδο (Αναφ.
69278): 3.1 ±0.4 se; based on size and trophs of closest relatives
Ελαστικότητα (Αναφ.
120179): Υψηλό, ελάχιστος χρόνος για διπλασιασμό πληθυσμού < 15 μήνες (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
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