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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.


Keywords:
Syrphinae, Melanostomini, Bacchini, new genus, new species
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