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Cyprinodontiformes (Rivulines, killifishes and live bearers) >
Rivulidae (Rivulines) > Cynolebiinae
Eponymy: Dr Eugenio Izecksohn (1932–2013) was a Brazilian herpetologist and a specialist in Neotropical anurans. [...] (Ref. 128868), visit book page.
Entorno: milieu / zona climática / rango de profundidad / gama de distribución
Ecología
; agua dulce bentopelágico. Tropical
South America: Atlantic coastal river basins in Brazil.
Tamaño / Peso / Edad
Madurez: Lm ?  range ? - ? cm
Max length : 6.0 cm TL macho / no sexado; (Ref. 36579)
Descripción breve
Claves de identificación | Morfología | Morfometría
Radios blandos dorsales (total) : 13 - 18; Radios blandos anales: 19 - 23; Vértebra: 27 - 28. Xenurolebias izecksohni is distinguished from all other species of Xenurolebias by lacking light spots on the distal half of the dorsal fin in males (vs. presence) and having oblique short bars on the ventral portion of the caudal fin in males (vs. absence). It also differs from X. myersi by having the caudal fin lanceolate in males, with a pronounced posterior tip (vs. sub-lanceolate, never forming a distinctive tip posteriorly), more dark grey bars on the flank in females (12-13 vs. 9-11), a more slender body (body depth 27.1-28.5% SL in males and 28.5-30.6% in females, vs. 29.0-31.4% and 30.1-33.9%), and a shorter lower jaw (18.6-20.9% of head length in males and 17.7-19.7% in females, vs. 22.4-24.5% and 19.6-21.4%, respectively); from X. pataxo by the possession of two or three black spots on the posterior part of the caudal peduncle in females (vs. absence); and from X. cricarensis by having a more slender head in males (head depth 81.2-85.0% of head length vs. 85.6-92.8%), a shorter lower jaw in males (18.6-20.9% of head length vs. 22.0-25.0%) and a more slender body in larger males (above 31 mm SL) (body depth 27.1-27.5% SL, vs. 30.7-33.9% SL) (Ref. 96072).
Body shape (shape guide): elongated.
Ciclo vital y comportamiento de apareamiento
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)
Situación en la Lista Roja de la UICN (Ref. 130435: Version 2025-2 (Global))
Amenaza para el ser humano
Harmless
Usos humanos
Herramientas
Informes especiales
Descargar XML
Fuentes de Internet
Estimaciones basadas en modelos
Índice de diversidad filogenética (Referencia 82804) |
PD50 = 0.5312 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00603 (0.00260 - 0.01395), 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 (Referencia 69278) |
3.2 ±0.4 se; based on size and trophs of closest relatives |
Resiliencia (Referencia 120179) |
Alto, población duplicada en un tiempo mínimo inferior a 15 meses (Preliminary K or Fecundity.). |
Vulnerabilidad pesquera (Ref. 59153) |
Low vulnerability (10 of 100). 🛈 |