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Nothobranchius fasciatus  Wildekamp & Haas, 1992

 

Wildekamp, R. H. & Haas, R. 1992. Redescription of Nothobranchius microlepis, description of two new species from northern Kenya and southern Somalia, and note on the status of Paranothobranchius (Cyprinodontiformes: Aplocheilidae). Ichthyological Exploration of Freshwaters, 3 (1): 1–16.

 

Vulnerable

Biotic index

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Distribution map

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Collecting period

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Holotype

BMNH 1986.11.24: 7, holotype, male, 46.5 mm SL; Somalia: flood pool on the road from Kisimayo over Badada to Kolbio, about 2 km after Goba, 107.8 km from Kisimayo, approx. 00°43' S, 41°52' E; R. H. Wildekamp & A. Ibrahim, 30 Jun 1983 [field code: S-16].

Paratypes

BMNH 1986.11.24.8-12 (5), MRAC 86-48-P-11-24 (14), MRAC 86-48-P-25 (1)

Diagnosis

Nothobranchius fasciatus is distinguished from all other species of the genus by its strongly curved dorsal profile, with no or almost no transition to the head, and by its unique male colour pattern of irregular crossbars. It is distinguished from the related N. microlepis by the curved instead of concave dorsal-head transition, shorter snout, deeper caudal peduncle, slightly higher number of rays in the anal fin, larger and more regularly set scales on the body, supraorbital neuromast systems in more distinct grooves and the colour patterns of male and female (after Wildekamp & Haas, 1992).

Classification

Subgenus: Cynobranchius

Taxonomic status

Nothobranchius fasciatus was established as a species by Wildekamp & Haas in 1992, and that status has been accorded by all authors since.

Type locality

Somalia: flood pool on the road from Kisimayo over Badada to Kolbio, about 2 km after Goba, 107.8 km from Kisimayo (approx. 00°43' S, 41°52' E).

Distribution

This species is endemic to coastal Somalia. It is known from temporary pools and marshes, and local water reservoirs in the Lach Badana, Lach Anole and Descech Uama drainage systems of southern Somalia.

Ecoregion

Shebelle–Juba (531)

Elevation

18–29 m

Ecology

Water parameters of type locality (Wildekamp & Haas, 1992):

Water temperature: 30 °C

pH: 6.8

Hardness: 4 °DGH, 6.5 °DKH

Syntopic congeners

N. jubbi - 100%

Reproduction

Introduced only once for short time. Embryonic development should not differ significantly to that of N. microlepis.

Size

Maximum size reported: 50.2 mm SL (MRAC 86-48-P-25, female)

Chromosomes

Diploid chromosome number 2n = 34, NF = 46, karyotype structure 12msm+22st/a (Scheel, 1981).

Karyotype structure unique in the genus.

Etymology

The specific name is formed from fascia (in Latin for band), in reference of the banded pattern of the males.

Conservation status

Vulnerable B1ab(iii) (Nagy & Watters, 2019);

Previous assessment: Data Deficient (Getahun, 2010)

References

​    Wildekamp, R. H. & Haas, R. 1992. Redescription of Nothobranchius microlepis, description of two new species from northern Kenya and southern Somalia, and note on the status of Paranothobranchius (Cyprinidontiformes: Aplocheilidae). Ichthyological Exploration of Freshwaters, 3 (1): 1–16. [taxonomy as Nothobranchius fasciatus]

    Nagy, B. & B. R. Watters. 2019. Nothobranchius fasciatus. The IUCN Red List of Threatened Species: e.T182507A58330934. [conservation]

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