Synorchestes Voss

Ayri, Shaloo, Kojima, Hiroaki & Y, R A M A M U Rt H, 2012, Flea weevils of the genus Synorchestes Voss (Coleoptera, Curculionidae, Curculioninae, Rhamphini), with description of a second species from India, Zootaxa 3568, pp. 74-80 : 75

Genus Synorchestes Voss

Synorchestes Voss, 1958: 103 (type species: Synorchestes grisescens Voss, 1958 ; China: Fukien; Anthonominae: Rhynchaenini); Morimoto & Miyakawa, 1996: 75 ( Rhamphini ); Kojima & Morimoto, 1996: 110 (key), 115; Alonso- Zarazaga & Lyal, 1999: 82 ( Curculioninae : Rhamphini : Rhamphina).

The diagnosis of this genus given by Morimoto & Miyakawa (1996) holds for the new species except that the following features should be modified to include the second species: Rostrum shorter than (male) or nearly as long as (female) pronotum, antennae with scape and basal four segments of funicle flattened dorso-ventrally, apical segment of club longer in male than that in female and, mesosternal process nearly as wide as or a little narrower than middle coxa.

Remarks. This genus is characterized by the following combination of features: Antennae with club loosely segmented; pygidium (female) ( Fig. 28 ) and propygidium (male) ( Fig. 29 ) broadly exposed; tibiae unarmed at apex, tarsal groove not ascended; hind femora weakly swollen, relatively more slender than those of other genera in this tribe; 7th tergite with pair of files for stridulation at anterior margin ( Fig. 30 ); bladal part of 8th sternite bilobed in female, and spermatheca with gland close to duct.

Kojima (2011) proposed that Megorchestes was probably related to Synorchestes , but the former differs in having the fore and middle tibiae armed at apex and the prosternum is deeply emarginate and depressed in front of the coxae.

Distribution. China, Taiwan, India (new country record).

Figures

FIGURES 19 – 30. Synorchestes grisescens Voss, antennal club 19. male, 20. female, hind tarsi 25. male, 26. Female; Synorchestes indicus sp. nov., antennal club 21. male, 22. female, hind tarsi 23. male, 24. female; 27. elytral striae, 28. female with exposed pygidium, 29. Male with exposed pygidium and propygidium, 30. scraper for stirdulatory organ of 7 th tergite.