Classificazione / Nomi
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Cyprinodontiformes (Rivulines, killifishes and live bearers) >
Rivulidae (Rivulines) > Cynolebiinae
Etymology: Austrolebias: Composed from Austro = the south + see under Lebias; ephemerus: Name from Greek 'ephemeros', i.e., ephemeral, short-lived, referring to its short life cycle and the highly seasonal environment in which it lives (Ref. 119764).
Ambiente: milieu / zona climatica / distribuzione batimetrica / gamma di distribuzione
Ecologia
; acqua dolce pelagico. Tropical
South America: Brazil.
Dimensione / Peso / Età
Maturità: Lm ?  range ? - ? cm
Max length : 3.2 cm SL maschio/sesso non determinato; (Ref. 119764); 2.8 cm SL (female)
Breve descrizione
Chiavi di identificazione | Morfologia | Morfometria
This species can be distinguished from other congeners by the following combination of characters: posterior margins of pectoral fins vertical between bases of 5th and 7th anal fin rays in females, greater number of gill rakers on 1st branchial arch, a lower head width in both sexes, a small number of neuromasts in the preopercular series, urogenital papilla attached 60-100% of its length to anal fin males, more rows of scales in transversal series, location of dorsal fin origin relative to the neural spines in both sexes, and reduction in number of dorsal and anal fin rays in both sexes.
Body shape (shape guide): fusiform / normal; Cross section: compressed.
Inhabits highly seasonal environment, in small temporary pools, with muddy bottom and slightly turbid water. Maximum length based on type specimen, to be replaced with a better reference (Ref. 119764).
Ciclo vitale e comportamento di accoppiamento
Maturità | Riproduzione | Deposizione | Uova | Fecondità | Larve
Volcan, M.V. and F. Severo-Neto, 2019. Austrolebias ephemerus (Cyprinodontiformes: Rivulidae), a new annual fish from the upper Rio Paraguai basin, Brazilian Chaco. Zootaxa 4560(3):541-553. (Ref. 119764)
Stato della Lista Rossa IUCN (Ref. 130435: Version 2025-2 (Global))
Minaccia per l'uomo
Harmless
Usi umani
Pesca: di nessun interesse
Strumenti
Rapporti speciali
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Fonti Internet
Stime basate su modelli
Indice di diversità filogenetica (Fonte Biblio. 82804) |
PD50 = 0.5039 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.01122 (0.00514 - 0.02450), b=3.04 (2.87 - 3.21), in cm total length, based on all LWR estimates for this body shape (Ref. 93245). |
Livello trofico (Fonte Biblio. 69278) |
3.1 ±0.4 se; based on size and trophs of closest relatives |
Resilienza (Fonte Biblio. 120179) |
Alto, tempo minimo di raddoppiamento della popolazione meno di 15 mesi (Preliminary K or Fecundity.). |
Vulnerabilità della pesca (Ref. 59153) |
Low vulnerability (10 of 100). 🛈 |