Publication details

Revised taxonomy of Synodontis catfishes (Siluriformes: Mochokidae) from the Lake Tanganyika basin reveals lower species diversity than expected

Authors	ENGLMAIER Gernot K BLAŽEK Radim ZIMMERMANN Holger BARTÁKOVÁ Veronika POLAČIK Matej ŽÁK Jakub MULOKOZI Deogratias P KATONGO Cyprian BÜSCHER Heinz H MABO Lwabanya KOBLMÜLLER Stephan PALANDAČIĆ Anja REICHARD Martin
Year of publication	2024
Type	Article in Periodical
Magazine / Source	Zoological Journal of the Linnean Society
MU Faculty or unit	Faculty of Science
Citation
web	https://academic.oup.com/zoolinnean/article/202/3/zlae130/7877276
Doi	http://dx.doi.org/10.1093/zoolinnean/zlae130
Keywords	Africa; cuckoo catfish; biodiversity; phylogenomic data; freshwater fish; historical DNA
Description	Synodontis Cuvier, 1816 is a species-rich group of African catfishes. Prior to this analysis, 13 species of Synodontis were recognized from Lake Tanganyika and its tributaries, composing the only extant lacustrine radiation of the genus, with a unique origin of obligate brood parasitism among all fishes. Species differentiation and phylogenetic relationships of this group remained largely unresolved. Herein, the taxonomy of Synodontis in the Lake Tanganyika basin is revised, including redescriptions of all species and an updated identification key. Genetic (mitochondrial and nuclear genomic markers) and morphological data suggest a lower species diversity than previously recognized, supporting the distinction of 10 Synodontis species in the lake basin. Based on our findings, we recognize Synodontis grandiops, Synodontis ilebrevis, and Synodontis lucipinnis as junior synonyms of Synodontis multipunctatus, Synodontis polli, and Synodontis petricola, respectively. No recent material of Synodontis dhonti and Synodontis tanganyicae (with Synodontis lacustricolus as a synonym) was available. Morphometric/meristic data suggest their close relationship to Synodontis granulosus. Sequencing of historical specimens inferred S. tanganyicae as sister to S. granulosus but with a 1.7% divergence based on mitochondrial data. In contrast to previous studies, phylogenomic data support the lacustrine assemblage of Synodontis in Lake Tanganyika as monophyletic.