Classification / Names
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Cyprinodontiformes (Rivulines, killifishes and live bearers) >
Rivulidae (Rivulines) > Cynolebiinae
Etymology: cricarensis: The specific name cricarensis is a reference to the occurrence of the new species in the Cricaré river basin, the former native name for the present day São Mateus River.
Environment: milieu / climate zone / depth range / distribution range
Ecología
; agua dulce bentopelágico. Tropical
Distribución
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South America: São Mateus river basin in Brazil.
Tamaño / Peso / Age
Maturity: Lm ? range ? - ? cm
Max length : 3.5 cm SL macho / no sexado; (Ref. 96072); 2.8 cm SL (female)
Short description
Claves de identificación | Morfología | Morfometría
Radios blandos dorsales (total) : 14 - 18; Radios blandos anales: 20 - 23; Vértebra: 28. Xenurolebias cricarensis can be diagnosed from X. myersi and X. pataxo by having dark reddish brown bars on the caudal fin slightly contrasting with lighter interspaces in males (vs. strongly contrasting); from X. izecksohni in having a deeper head in males (head depth 85.6-92.8% of head length vs. 81.2-85.0%), a longer lower jaw in males (22.0-25.0% of head length vs. 18.6-20.9%), a deeper body in larger males (above 31 mm SL) (body depth 30.7-33.9% SL, vs. 27.1-27.5% SL), and dorsal and anal-fin filaments reaching between the base and middle of the caudal fin in males (vs. reaching posterior portion of the caudal fin). It can be further distinguished from X. myersi by having the caudal fin lanceolate in larger males, with a pronounced posterior tip (vs. sub-lanceolate, never forming a distinctive tip posteriorly) and more dark brown bars on the caudal fin in males (7-10 vs. 4-6); and from X. pataxo by having 1-5 black spots on the posterior part of the caudal peduncle in females (vs. absence) (Ref. 96072).
Occurs in a temporary swamp. A portion of the swamp is located in the border of a small forest fragment, and a part extending to an area without trees but densely occupied by the cattail Typha domingensis (Ref. 96072).
Life cycle and mating behavior
Madurez | Reproducción | Puesta | Huevos | Fecundidad | Larva
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. 130435: Version 2024-2)
Threat to humans
Harmless
Human uses
Herramientas
Special reports
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Fuentes de Internet
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5625 [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).
Nivel trófico (Ref.
69278): 3.1 ±0.4 se; based on size and trophs of closest relatives
Resiliencia (Ref.
120179): Alto, población duplicada en un tiempo mínimo inferior a 15 meses (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
