Klassificering / Namn
Populärnamn | synonymer | Catalog of Fishes(Släkte, Arter) | ITIS | CoL | WoRMS | Cloffa
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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.
Miljö: miljö / Klimatzon / djupintervall / distributionsområde
Ekologi
; sötvatten bentopelagisk. Tropical
South America: São Mateus river basin in Brazil.
Storlek / Vikt / Ålder
Könsmognad: Lm ?  range ? - ? cm
Max length : 3.5 cm SL hane/ej könsbestämd; (Ref. 96072); 2.8 cm SL (female)
Kort beskrivning
Bestämningsnycklar | Morfologi | Morfometri
Mjukstrålar i ryggfenan (totalt) : 14 - 18; Mjukstrålar i analfenan: 20 - 23; Ryggkotor: 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).
Body shape (shape guide): fusiform / normal.
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).
Livscykel och parningsbeteende
Könsmognad | Reproduktion | Lek | Ägg | Fekunditet | Larver
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)
Status på IUCN:s rödlista (Ref. 130435: Version 2025-2 (Global))
Hot mot människor
Harmless
Mänskliga användningsområden
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Uppskattningar baserade på modeller
Index för fylogenetisk mångfald (Ref. 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=0.01122 (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). |
Trofisk nivå (Ref. 69278) |
3.1 ±0.4 se; based on size and trophs of closest relatives |
Resiliens (Ref. 120179) |
Hög, lägsta populationsfördubblingstid mindre än 15 månader (Preliminary K or Fecundity.). |
Sårbarhet i fisket (Ref. 59153) |
Low vulnerability (10 of 100). 🛈 |