Two new species of the genus Diostracus Loew from Tibet, with a key to the Himalayan fauna (Diptera, Dolichopodidae)

Abstract

Previously only one species of the genus Diostracus was known to occur in Tibet. Here the following two new species are added to the fauna of Tibet: Diostracus acutatus sp. n. and Diostracus tibetensis sp. n. Their relationships with similar species are discussed. A key to the species of Diostracus from the Himalayas is presented.

Six new species of Diostracus Loew (Diptera, Dolichopodidae) from Tibet

“…Before our study, 101 species of the genus had been reported ( Zhu 2006 ; Zhu et al 2007a , b ; Grichanov 2013 , 2015 , 2017 ; Pusch 2014 ; Wang et al 2015 ). The first Diostracus , D. prasinus Loew, was named in 1861 from the Nearctic Region, whereas most species of the genus were reported from the Palaearctic and Oriental realms.…”

“…The first Diostracus , D. prasinus Loew, was named in 1861 from the Nearctic Region, whereas most species of the genus were reported from the Palaearctic and Oriental realms. Remarkably, Diostracus shows great diversity in the Himalayas, which is the junctions of the two realms, and 39 species have been reported from this area ( Zhu 2006 ; Wang et al 2015 ). Tibet is located in the east of the Himalaya Mountains.…”

“…Tibet is located in the east of the Himalaya Mountains. However, there were only three species of Diostracus known from Tibet: D. nebulosus Takagi, 1972 is widely distributed in the Himalayas, while D. acutatus Wang et al, 2015 , and D. tibetensis Wang et al, 2015 were reported in Nyingchi, Tibet.…”

A new species of Diostracus Loew, 1861 (Diptera: Dolichopodidae) from China with a key to species from the Yunnan Province

“…Diostracus Loew, 1861, Sphyrotarsus Mik, 1874, Lagodechia Negrobov, Tsurikov, 1996, and Ozmena Özdikmen, 2010. Saigusa [1984, 1995 and Wang et al [2015] Description. Male (Fig.…”

“…It was recently reviewed by Yang et al [2011] for the Chinese fauna, Grichanov [2013] for the West Palaearctic fauna (including Pamirs), and Wang et al [2015] for the Himalayan fauna. Four species were described from the northernmost mountains of Myanmar [Saigusa, 1995].…”