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Xenurolebias pataxo  Costa, 2014

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Xenurolebias pataxo
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Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Cyprinodontiformes (Rivulines, killifishes and live bearers) > Rivulidae (Rivulines)
Etymology: pataxo: The specific name refers to the Pataxó native tribe, formerly inhabiting the whole area where the new species is found.

Environment / Climate / Range Ecology

Freshwater; benthopelagic.   Tropical; 17°S - 19°S, 40°W - 39°W (Ref. 96072)

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

South America: Mucuri, Itanhem and Jucuruçu river basins in Brazil.

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 3.2 cm SL male/unsexed; (Ref. 96072); 2.6 cm SL (female)

Short description Morphology | Morphometrics

Dorsal soft rays (total): 12-18; Anal soft rays: 19 - 24; Vertebrae: 27 - 29. Xenurolebias pataxo differs from all species of Xenurolebias by the absence of black spots on the posterior part of the caudal peduncle in females (vs. 1-5 spots). It is also distinguished from X. myersi by its narrower head (head width 65.7-71.1% SL in males and 65.8-70.3% in females, vs. 71.5-74.6% and 74.5-81.1%, respectively), lack of round yellow spots on the distal portion of the anal fin in males (vs. presence), longer filaments on the tip of the dorsal fin in males (reaching the posterior portion of the caudal fin, vs. reaching between the base and middle of the caudal fin), and caudal fin lanceolate, with a pronounced posterior tip in larger individuals (vs. sub-lanceolate, never forming a distinctive tip posteriorly). It can be further diagnosed from X. izecksohni by having the dorsal and anal fins, in males, with short light bars on the basal portion and small round light spots of the distal portion (vs. branching bars), absence of oblique short bars on ventral portion of caudal fin in males (vs. presence), and fewer dark brown bars on the caudal fin in males (5-7 vs. 9-12) (Ref. 96072).

Biology     Glossary (e.g. epibenthic)

Occurs in a broad coastal plain area which is situated within a touristic zone. As a consequence, the natural habitats have experienced a great decline since the 1980s, with remarkable habitat loss in the last two decades due to intensive urbanization (Ref. 96072).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

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

Costa, W.J.E.M. and P.F. Amorim, 2014. Integrative taxonomy and conservation of seasonal killifishes, Xenurolebias (Teleostei: Rivulidae), and the Brazilian Atlantic forest. Systematic and Biodiversity (Ref. 96072)

IUCN Red List Status (Ref. 115185)

CITES (Ref. 94142)

Not Evaluated

Threat to humans

  Harmless




Human uses

FAO(Publication : search) | FisheriesWiki |

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BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | ECOTOX | Faunafri | Fishes of Iran | Fishtrace | GenBank(genome, nucleotide) | GloBI | GOBASE | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Scirus | SeaLifeBase | Tree of Life | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5625   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00891 (0.00397 - 0.01999), 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   ±0.4 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278):  High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153):  Low vulnerability (10 of 100) .