Mesothrips Zimmermann, 1900

Dang, Lihong, Tong, Xiaoli & Mound, Laurence A., 2024, New synonymy among gall thrips of the Asian genus Mesothrips, with revision of species from China (Thysanoptera, Haplothripini), ZooKeys 1196, pp. 121-138 : 121

publication ID	https://dx.doi.org/10.3897/zookeys.1196.118131
publication LSID	lsid:zoobank.org:pub:C1E809C2-1B1B-4AD0-8A2A-60836D2DD252
persistent identifier	https://treatment.plazi.org/id/BB60D02D-47C9-52B3-AF0B-AEDA9E1B8A48
treatment provided by	ZooKeys by Pensoft
scientific name	Mesothrips Zimmermann
status

Treatment

Mesothrips Zimmermann View in CoL

Mesothrips Zimmermann, 1900: 12. Type species Mesothrips jordani Zimmermann, 1900, by subsequent designation of Priesner 1929a: 452.

Note.

From China six species have been recorded in this genus ( Dang et al. 2014), but the records of M. alluaudi and M. manii are here rejected. Mesothrips alluaudi was recorded from China by Moulton (1928b: 318), based on a single female collected from Machilus sp. at Taihoku, Taiwan by R. Takahashi on 27 June 1927. Subsequent authors in China have repeated this record, but apparently without checking the original Moulton paper. The specimen from Taiwan was identified by Moulton based only on Vuillet’s original description of two specimens taken in Madagascar, and that original description is insufficient to place M. alluaudi with confidence into any genus. Moreover, it states that only two sense cones are present on the third antennal segment, in contrast to the three on Mesothrips species. The identity of the specimen from Taiwan that Moulton identified as this species remains unknown. Mesothrips manii was based on a holotype female taken with over 100 adults of both sexes in leaf galls on Santalum album in Tamil Nadu, southern India. The original description states that the body length of females was 1718-2215 μm, and the head length 181-215 μm, with the fore wings having a yellowish tinge, and tergite IX setae S1 slightly shorter than the tube. Zhang (1984: 17) recorded M. manii from China on Hainan Island and subsequently Zhang et al. (1999) recorded this species from Fujian Province. We have now re-examined these specimens; the four males from Hainan are here recognised as M. jordani and from Fujian the single female is considered a species of the genus Bamboosiella .

Generic diagnosis.

small to medium sized, dark, macropterous Phlaeothripinae - Haplothripini . Head usually longer than wide, cheeks sharply constricted at base (Figs 2-7 View Figures 2–7 ); postocular setae developed; maxillary stylets rather short, usually not reaching postocular setae, V-shaped (rarely reaching postocular setae, and parallel medially); maxillary bridge present. Antennae 8-segmented (Figs 8-11 View Figures 8–13 , 31 View Figures 26–31 ); segment III with three (rarely two) sense cones, IV with four major sense cones; VIII usually short. Pronotum well developed, with five pairs of major setae (Figs 2-7 View Figures 2–7 , 26 View Figures 26–31 , 27 View Figures 26–31 ); notopleural sutures complete. Prosternal basantra present; ferna well developed; mesopresternum usually divided into two lateral triangular plates; metathoracic sternopleural sutures absent. Fore tarsal tooth usually large in both sexes (Fig. 5 View Figures 2–7 ), sometimes absent or scarcely visible (Figs 12 View Figures 8–13 , 13 View Figures 8–13 ). Fore wings constricted medially, with duplicated cilia (Figs 18 View Figures 14–25 , 19 View Figures 14–25 ). Pelta triangular, usually with a pair of CPS (Fig. 16 View Figures 14–25 ); tergites II-VII each with two pairs of sigmoid wing-retaining setae, also usually with a pair of accessory sigmoid setae anterior to first pair (Figs 17 View Figures 14–25 , 21 View Figures 14–25 , 22 View Figures 14–25 ); tergite IX setae S1 and S2 long and pointed (Figs 28 View Figures 26–31 , 29 View Figures 26–31 ). Male tergite IX setae S2 short (Figs 24 View Figures 14–25 , 25 View Figures 14–25 ); sternite VIII without pore plate.