Biema Huo & Zhao gen. nov., a new flower fly genus (Diptera, Syrphidae) from China

Ke-Ke Huo, Le ZHAO, Ximo MENGUAL, Gang LI, Xin LIU, Lian-Jun ZHAO & Zhen-Ning CHEN

en European Journal of Taxonomy 852 (98) - Pages 98-116

Published on 21 December 2022

A new flower fly genus (Diptera, Syrphidae), Biema Huo & Zhao gen. nov. from China is described based on two new species: Biema wanglangensis Huo & Zhao gen. et sp. nov. (designated as type-species) and Biema qilianensis Huo & Liu gen. et sp. nov. The new genus can easily be distinguished by the following morphological features: head, mesonotum and scutellum black; postpronotum without pile; metasternum not reduced, posterior margin shallowly concave; katepisternum only with ventral pile patches; alula narrow, as wide as basal width of cell c; male postabdomen conspicuously more swollen than other segments, surstylus and postgonite complex, phallus unsegmented. The results of our Bayesian inference and Maximum Likelihood analysis based on sequences of the Cytochrome c oxidase subunit I (COI) gene, as well as the species delimitation tests, support the separation of Biema Huo & Zhao gen. nov. from its related taxa. Additionally, an identification key to the genera of the tribes Bacchini and Melanostomini occurring in China is provided.

Syrphinae, Melanostomini, Bacchini, new genus, new species
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