The genus Yssolebias, Huber 2012

Yssolebias is a monotypic genusname given by J.H. Huber in 2012. The only species in the genus was named after the town it was discovered in 1887 by the Austrian scientist Karl Steindachner. Steindachner named the species Cyprinodon martae, as said after the town Santa Marta in the northern part of Colombia.

Huber had reason to believe the genusname Cypronodon was not assigned correct to this fish and erected a new genus for it named Yssolebias in Rivulidae.

Costa questioned Huber's conclusion and proved, based on new and much better Radiographs of the unique sample in the museum of Vienna, that this species could not be placed in aplocheiloids as suggested by Huber but should considered to be synonyme to Cubanichthys or Chriopeoides.

In reaction of Huber a new family-group name, Yssolebiini, is proposed to accommodate the unique morphology of Yssolebias among cyprinodontids.

See also:

Killi-Data Series 2015 [36 pages, as a print, ISBN 979-10-93353-02-9, as a PDF document, ISBN 979-10-93353-03-6] Killi-Data Series 2015, 4-16, 3 figs., 2 tabs.

A morphological rediagnosis of Yssolebias within cyprinodontoids (Cyprinodontiformes) following the detailed osteological analysis by Costa based on a new radiograph of the single type of Cyprinodon martae Steindachner.

Huber, J.H. Abstract: The monotypic genus Yssolebias Huber, 2012 based on the single type of Cyprinodon martae initially placed in aplocheiloids and related to annual vicariant genera is redefined based on morphological characters, to complement Costa’s detailed osteological analysis based on a clear new radiograph of the specimen.

 
First hypotized drawing made by F. Vermeulen based partly on the uniqe photograph from the type species in Vienna, and partly by assumptions made by myself.
Second drawing, more detailed reconstruction from the unique specimen in Vienna. Drawing made by F. Vermeulen

 

The emblematic morphological characters which separated Yssolebias from vicariant rivulins, together with some striking external similarities with Terranatos, now analysed as convergence, appear even more extraordinary when compared to other cyprinodontids. New micromorphological characters are studied and the hypothesis suggested by Costa, as to consider Yssolebias as a probable synonym of Cubanichthys + Chriopeoides, is refuted and a new family-group name, Yssolebiini, is proposed to accommodate the unique morphology of Yssolebias among cyprinodontids.

zoobank.org:pub:0A7A1EC0-B229-4BD6-B417-B4035F6EAA62 

 

 

Behaviour:

Nothing is known about their behaviour and natural biotope. The species may occurr in brackish- or marine water.
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