Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa

Teleostei (teleosts) > 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).

Environment: milieu / climate zone / depth range / distribution range Ecology

Freshwater; pelagic. Tropical

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

South America: Brazil.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 3.2 cm SL male/unsexed; (Ref. 119764); 2.8 cm SL (female)

Short description Identification keys | Morphology | Morphometrics

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.

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).

Life cycle and mating behavior Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | Larvae

Main reference Upload your references | References | Coordinator : Costa, Wilson J.E.M. | Collaborators

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)

IUCN Red List Status (Ref. 130435)

Critically Endangered (CR) (B1ab(ii,iii,iv)); Date assessed: 29 December 2020

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

FAO - Publication: search | FishSource |

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Internet sources

Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = No PD50 data [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00891 (0.00396 - 0.02008), b=3.14 (2.94 - 3.34), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trophic level (Ref. 69278): 3.1 ±0.3 se; based on size and trophs of closest relatives

Resilience (Ref. 120179): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).

Fishing Vulnerability (Ref. 59153): Low vulnerability (10 of 100).

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Austrolebias ephemerus Volcan & Severo-Neto, 2019