Studies of the Genus Thyreus Panzer (Hymenoptera: Apidae: Apinae) with Six New Records from Vietnam

Author: Tran Thi Ngat*, Nguyen Phuong Minh**,***, Truong Xuan Lam*,*** and Nguyen Thi Phuong Lien*,***

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Abstract

Nine species of the genus Thyreus Panzer, 1806 (Hymenoptera: Apidae: Apinae) from Vietnam are presented. Three species, Thyreus himalayensis (Radoszkowski, 1893), T. histrio (Fabricius, 1775) and T. massuri (Radoszkowski, 1893) are reconfirmed to occur in Vietnam. Six species, T. abdominalis (Friese, 1905), T. centrimacula (Pérez, 1905), T. ceylonicus (Friese, 1905), T. decorus (Smith, 1852), T. medius (Meyer, 1921) and T. regalis Lieftinck, 1962 are newly recorded for the Vietnamese fauna. A redescription of T. abdominalis rostratus is provided. Keys to both sexes of all recorded species are given with illustrations.

Keywords

Hymenoptera, Apidae, Thyreus, new records, Vietnam.

Conclusion

Nine species of the genus Thyreus Panzer, 1806 (Hymenoptera: Apidae: Apinae) from Vietnam are presented. Three species, Thyreus himalayensis (Radoszkowski, 1893), T. histrio (Fabricius, 1775) and T. massuri (Radoszkowski, 1893) are reconfirmed to occur in Vietnam. Six species, T. abdominalis (Friese, 1905), T. centrimacula (Pérez, 1905), T. ceylonicus (Friese, 1905), T. decorus (Smith, 1852), T. medius (Meyer, 1921) and T. regalis Lieftinck, 1962 are newly recorded for the Vietnamese fauna. A redescription of T. abdominalis rostratus is provided. Keys to both sexes of all recorded species are given with illustrations.

References

Thyreus Panzer, 1806 is distributed in Central and South Asia, Europe, Africa and Oceania (Ascher & Pickering, 2016). This genus comprises 111 described species worldwide, with 13 species recorded in southeastern Asia. A total of 83 species of this genus are recognized in the Palearctic and Indo-Australian areas after revision (Ascher & Pickering, 2016). Forty species are recorded in sub-Saharan Africa after the revision by Eardley (1991). Revisions of the genus Thyreus in Indo-Australia, the Palearctic and Spain were conducted by Lieftinck (1958, 1959, 1962), Lieftinck (1968) and Vergés (1967), respectively. In Thyreus, body size is greatly dependent on environmental conditions. In the female, the main characteristics used to differentiate species include color, size and confluence or interruption of hair patches on the thorax. However, in the male, classification is also based on the same characters as in the female as well as characters such as presence or absence of a tooth on t

How to cite this article

Tran Thi Ngat, Nguyen Phuong Minh, Truong Xuan Lam, and Nguyen Thi Phuong Lien, (2017). Studies of the Genus Thyreus Panzer (Hymenoptera: Apidae: Apinae) with Six New Records from Vietnam , Biological Forum – An International Journal 9(2): 227