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Habitus of holotypes. A, B. Stegana (Steganina) alianya;C, D. Stegana (Steganina) diodonta; E, F. Stegana (Steganina) zebromyia. Zhang & Chen in Wang, Lu, Zhang & Chen, 2021. |
Abstract
The Stegana (Steganina) shirozui species group is mainly distributed in East Asia. In the present study, the molecular phylogeny of the S. shirozui group was investigated based on mitochondrial (COI and ND2) and nuclear (28S rRNA) markers. The resulting trees support the S. shirozui group as monophyletic and indicate that in this group, species associated with closer affinities show higher structural homogeneity in male genitalia. Molecular species delimitation assess most species limits and recognize four new species in the S. shirozui group from south-west China: S. alianya sp. nov., S. diodonta sp. nov., S. zebromyia sp. nov. and S. zopheria sp. nov. One new synonym was also recognized. Additionally, three typical male genital characters of the S. shirozui group were placed on the molecular phylogenetic framework. The outcome of both divergence-time estimation and ancestral area reconstruction suggests that the S. shirozui group likely originated in south-west China in the Middle Miocene.
KEYWORDS: biodiversity, biogeography, drosophilid, phylogeny, species delimitation, taxonomy
Stegana shirozui species group
Stegana shirozui species group: Chen et al., 2009: 1910.
Stegana (Steganina) alianya Zhang & Chen
Etymology: The name alianya mean ‘sky tree’ in the language of the Dai People, referring to the tall rainforest trees that seem to touch the sky in the type locality of this species. It is a noun in apposition.
Stegana (Steganina) diodonta Zhang & Chen
Etymology: The epithey is composed of the Greek δύο, two, and οδόντι, tooth, referring to the surstylus with two prensisetae.
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Habitus of holotypes. A, B. Stegana (Steganina) alianya sp. nov.; C, D. Stegana (Steganina) diodonta sp. nov.; E, F. Stegana (Steganina) zebromyia sp. nov.; G, H. Stegana (Steganina) zopheria sp. nov. |
Stegana (Steganina) zebromyia Zhang & Chen
Etymology: The name refers to the tachinid genus Zebromyia Malloch, 1929, which is so named for its striped abdomen (from Greek ζέβρα, zebra, and μυια, muscles) referring to the mesoscutum with its longitudinal markings.
Stegana (Steganina) zopheria Zhang & Chen
Etymology: The name is derived from the Greek ζοφερος, gloomy, referring to the dark mesoscutum.
Ya-Lian Wang, Jin-Ming Lu, Yuan Zhang and Hong-Wei Chen. 2021. Molecular Phylogeny, Species Delimitation and Biogeographic History of the Stegana (Steganina) shirozui Species Group (Diptera: Drosophilidae) from East Asia. Zoological Journal of the Linnean Society. 192(3); 998–1016. DOI: 10.1093/zoolinnean/zlaa118
