Classification / Names
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Characiformes (Characins) >
Characidae (Characins; tetras) > Stethaprioninae
Etymology: Astyanax: The name of Astyanax, Hector´s son in the Greek mythology (Ref. 45335); procerus: From the Greek adjective procerus, meaning tall, in reference the high body depth of the species.
Eponymy: Astyanax was the son of Hector in Greek mythology. See Homer’s Iliad for details. The reasoning for its use for a genus of characins is not explained. (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
Οικολογία
; Γλυκού νερού βενθοπελαγικό. Tropical
South America: upper and middle rio Taquari-Antas and rio Jacuí, laguna dos Patos
system in Rio Grande do Sul, Brazil.
Μέγεθος / Βάρος / Age
Maturity: Lm ? range ? - ? cm
Max length : 11.9 cm SL αρσενικό/απροσδιόριστο; (Ref. 94153)
Short description
Κλείδες προσδιορισμού | Μορφολογία | Μορφομετρία
Μαλακές ραχιαίες ακτίνες (συνολικά) : 10 - 11; Σπόνδυλοι: 36 - 38. This species is distinguished from all congeners in the rio Uruguay basin, laguna dos Patos and rio Tramandaí systems by having the following characters: two humeral spots (vs. one in Astyanax eigenmanniorum, A. sp. aff. fasciatus, A. jacuhiensis, and A. laticeps); first humeral spot vertically elongate with upper portion wider portion narrow and curved, with a pronounced constriction at the junction of both portions (vs. present of oval shape spot with two brown vertical bars in humeral region in A. jacuhiensis, oval shape in A. laticeps and forming a uniform wedge in A. eigenmanniorum and A. henseli); anal fin with 8-23 branched rays (vs. 18 or less in A. rachypterygium and A.cremnobates, 23 or more in A. aramburui, A. paris, A. saguazu, and A. stenohalinus); one maxillary tooth (vs. 2-5 in A. henseli); maxillary teeth tri- to pentacuspid (vs. hexa- to heptacuspid in A. dissensus and A. ojiara); and body depth 38.3-46.0% of SL (vs. smaller than 38% of SL in A. brachypterygium, A. cremnobates, A. obscurus, and A. xiru). It is most similar to A. xiru in color pattern, but it can be differentiated by the pelvic-fin length 16.1-18.7% of SL (vs. 13.6-17.1%), dorsal-fin length 24.1- 28.7% of SL (vs. 21.1-25.4%) and absence of bony hooks on the anal and pelvic fins of males (vs. presence) (Ref. 94153).
Life cycle and mating behavior
Γεννητική Ωρίμανση | Αναπαραγωγή | Γεννοβολία | Αβγά | Γονιμότητα | Προνύμφες
De Lucena, C.A.S., J.B. Castro and V.A. Bertaco, 2013. Three new species of Astyanax from drainages of southern Brazil (Characiformes: Characidae). Neotrop. Ichthyol. 11(3):537-552. (Ref. 94153)
IUCN Red List Status (Ref. 130435: Version 2024-2)
Threat to humans
Harmless
Human uses
Εργαλεία
Special reports
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Διαδικτυακές πηγές
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01096 (0.00493 - 0.02437), b=3.10 (2.93 - 3.27), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
Τροφικό Επίπεδο (Ref.
69278): 2.8 ±0.4 se; based on size and trophs of closest relatives
Ελαστικότητα (Ref.
120179): Υψηλό, ελάχιστος χρόνος για διπλασιασμό πληθυσμού < 15 μήνες (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
