A taxonomic study of the genus Te t r a Keifer (Acari: Eriophyidae: Phyllocoptinae: Anthocoptini) from Shaanxi Province, China with descriptions of nine new species Author Xue, Xiao-Feng Author Song, Zi-Wei Author Hong, Xiao-Yue text Zootaxa 2006 1249 1 22 journal article 50598 10.5281/zenodo.172971 a6418974-2006-4f93-8688-42d5c7960b55 1175­5326 172971 Key to species in the genus Tetra in China 1 Coxal area smooth......................................................................................................... 2 ­ Coxal area with short lines or granules ....................................................................... 12 2 Setae h1 absent .......................................................................... Tetra intermedia Huang ­ Setae h1 present............................................................................................................. 3 3 Empodium 7­rayed ....................................................................... Tetra yushania Huang ­ Empodium 4­rayed........................................................................................................ 4 4 Coxal area with prosternal apodeme ....................................... Tetra similisforca Huang ­ Coxal area without prosternal apodeme ........................................................................ 5 5 Shield design without median line ................................................................................ 6 ­ Shield design with median line ..................................................................................... 8 6 Admedian lines on prodorsal shield separate .................................. Tetra acerii sp. nov. ­ Admedian lines on prodorsal shield connected............................................................. 7 7 Admedian lines on prodorsal shield connected at basal 2/3 .............. Tetra toona Huang ­ Admedian lines on prodorsal shield connected at base ............... Tetra sorbusis sp. nov. 8 Shield design with median line separate from admedian lines ....... Tetra lucidi sp. nov. ­ Shield design with median line connected with admedian lines................................... 9 9 Shield design with median line 1/3 anterior, female genital coverflap with 8 to 10 lon­ gitudinal ridges ........................................................ Tetra guiyangensis Kuang & Hong ­ Shield design with median line 1/3 at base, female genital coverflap with more than 10 longitudinal ridges....................................................................................................... 10 10 Femur Ι and ΙΙ with longitudinal lines ......................... Tetra polygoni Wei, Chen & Xie ­ Femur smooth.............................................................................................................. 11 11 Shield design with admedian lines connected at basal 1/3, admedian and submedian lines separate ........................................................... Tetra clerodendri Wei, Chen & Xie ­ Shield design with admedian lines connected at basal 1/3 and 2/3, admedian and sub­ median lines connected ............................................................... Tetra smilaxis sp. nov. 12 Coxal area with granules............................................................................................. 13 ­ Coxal area with short lines .......................................................................................... 15 13 Female genital coverflap smooth, empodium 7­rayed ................................................... ..................................................................................... Tetra dalbergiae Kuang & Zhuo ­ Female genital coverflap with 10 longitudinal ridges, empodium 4­rayed................. 14 14 Prodorsal shield with lateral lobe, dorsal annuli with elliptical microtubercles. ............ ................................................................................................. Tetra ningshanis sp. nov. ­ Prodorsal shield without lateral lobe, dorsal annuli with spiny microtubercles.............. .......................................................................................... Tetra suspensae Xue & Hong 15 Dorsal annuli with microtubercles .............................................................................. 16 ­ Dorsal annuli smooth .................................................................................................. 23 16 Empodium 2­rayed ...................................................................... Tetra concava (Keifer) ­ Empodium more than 2­rayed..................................................................................... 17 17 Dorsal annuli with elliptical microtubercles ............................................................... 18 ­ Dorsal annuli with spiny or filament microtubercles .................................................. 20 18 Empodium 4­rayed, shield design obscure ................................. Tetra cuihuae sp. nov. ­ Empodium 6 to 7­rayed, shield design distinct ........................................................... 19 19 Solenidion knobbed, dorsal annuli with elliptical microtubercles on rear annular mar­ gins ................................................................................................. Tetra salixis sp. nov. ­ Solenidion tapered, dorsal annuli with elliptical microtubercles ahead of rear annular margins ............................................................................. Tetra japonicae Xue & Hong 20 Empodium 4­rayed ................................................................ Tetra pinnatifidae sp. nov. ­ Empodium 6 to 7­rayed............................................................................................... 21 21 Shield design with median line complete .......................... Tetra formosae Xue & Hong ­ Shield design with median line incomplete................................................................. 22 22 Shield design with granules on lines, median line connected with admedian lines at basal 1/3 ............................................................................... Tetra lobatae Xue & Hong ­ Shield design without granules on lines, median and admedian lines separate .............. ....................................................................................... Tetra superbae Huang & Wang 23 Prodorsal shield smooth ........................................................ Tetra louguantais sp. nov. ­ Prodorsal shield with design ....................................................................................... 24 24 Median line on prodorsal shield present ..................................................................... 25 ­ Median line on prodorsal shield absent....................................................................... 29 25 Median, admedian and submedian lines complete and separated each other ................. .............................................................................. Tetra phyllostachyis Kuang & Zhang ­ Prodorsal shield design network ................................................................................. 26 26 Setae h1 present ............................................................... Tetra shiheziensis Wang & Lu ­ Setae h1 absent............................................................................................................ 27 27 Prodorsal shield without median line at base .................. Tetra gleditsiae Kuang & Luo ­ Prodorsal shield with median line at base ................................................................... 28 28 Female coverflap with 3 transverse lines at base and 5 to 8 longitudinal ridges, median line connected with admedian lines at basal, central and anterior .................................. ........................................................................................................ Tetra cleomis Kuang ­ Female coverflap with 8 longitudinal ridges, median line connected with admedian lines at basal .................................................................... Tetra lycopersici Xue & Hong 29 Coxal area without prosternal apodeme ..................... Tetra lushuiensis Kuang & Hong ­ Coxal area with prosternal apodeme ........................................................................... 30 30 Empodium 6­rayed, submedian lines present ....... Tetra nanjingensis Lin, Jin & Kuang ­ Empodium 4­rayed, submedian lines absent............................................................... 31 31 Admedian lines connected at base, female coverflap with 12 to 14 longitudinal ridges .......................................................................................................... Tetra populi Kuang ­ Admedian lines separate, female coverflap with 8 to 10 longitudinal ridges ................. ........................................................................................ Tetra heilongjiangensis Kuang