Description d'une nouvelle espèce de Thysochromis

[Philippe.HOTTON]

09-oct.-2019

A new species of Thysochromis is described (traduire).
Par Juan Miguel Artigas Azas

A new species of Thysochromis from the Republic of Congo has been described in the Journal of Fish Biology by Gina Walsh, Anton Lamboj and Melanie Stiassny. The new species has its origin in the collection of two specimens collected in 1991 in Lake Koubambi, originally identified as Thysochromis ansorgii, but with a significant distribution disruption. The new species, Thysochromis emili is named after Emil Woolf Kentridge-Young, grandson of William Kentridge and Anne Stanwix, in recognition by the authors of their support of research in Africa. T. emili is diagnosed from T. ansorgii by a combination of characters, which include fewer scale rows between the pectoral and pelvic-fin origins; jaw teeth closely spaced and evenly implanted over entire length of both upper and lower jaws (versus widely spaced and unevenly implanted along distal portions); a supra-occipital crest that is continuous with the frontal ridge (versus terminating posterior to frontal ridge); a shorter post-orbital length and a shorter caudal peduncle length. T. emili is known from well oxygenated lakes and rivers, where it was collected in shallow, clear water shoreline waters fringed by abundant overhanging vegetation. The paper also includes recognizes the synonymy of T. annectens with T. ansorgii.

Walsh, Gina & Anton Lamboj & Melanie L.J. Stiassny. 2019. "Review of the cichlid genus Thysochromis (Teleostei: Ovalentaria) with the description of a new species from the Kouilou Province in the Republic of Congo, west–central Africa". Journal of Fish Biology (crc09445) (résumé)

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