Plant mites of the Dominican Republic, with a description of a new species of Petrobia (Tetranychina) Wainstein, 1960 (Acari, Prostigmata, Tetranychidae) and a key to the species of this subgenus Martínez, Leocadia Sánchez Flechtmann, Carlos H. W. De Moraes, Gilberto J. Zootaxa 2014 3846 4 547 560 [517,664,1463,1489] Arachnida Tetranychidae Petrobia Animalia Prostigmata 11 558 Arthropoda genus    1. Dorsal opisthosomal setae very short, not reaching bases of consecutive setae, except for f1and f2which are longer........ 2  - Dorsal opisthosomal setae longer than longitudinal distances between bases of consecutive setae....................... 6   2. All dorso-opisthosomal setae set on tubercles.............................  P. ( T.) prasadi  Baker& Tuttle, 1994( USA)  - Only dorsal opisthosomal setae f1and f  2seton tubercles....................................................... 3   3. Peritreme ending in anastomosing chambers forming a globular structure......................................... 4  - Peritreme ending in a single chamber, straight or slightly hooked................................................ 5   4. Seta f1surpassing base of f2......................................... P. ( T.) californica  Baker& Tuttle, 1994( USA)  - Seta f1not reaching base of f2................................................. P. ( T.) apicalis Banks, 1917( USA)   5. All legs shorter than idiosoma (not including gnathosoma); distal section of peritreme slightly curved..........................................................................................  P. ( T.) marsai Manson, 1964( Tunisia)  - Legs I and IV longer than idiosoma (not including gnathosoma); distal section of peritreme sigmoid.....................................................................................  P. ( T.) donnalucatensis Vacante, 1983(Sicily)   6. Legs I shorter than idiosoma (not including gnathosoma)...................................................... 7  - Legs I as long as or longer than idiosoma (not including gnathosoma)............................................ 8   7. Dorsal body setae acutely tapering from base, set on moderate tubercles; females large, up to 950 µm long........................................................................  P. ( T.) zachvatkini Reck & Bagdasarian, 1949( Armenia)  - Dorsal body setae filiform (more or less cylindrical) and set on very strong tubercles. Females ca. 580 µm long........................................................................  P. ( T.) moutiai  Baker& Pritchard, 1960( Mauritius)   8. Tubercles of dorsocentral setae c1, d1and e1contiguous....................................................... 9  - Tubercles of dorsocentral setae separated................................................................... 0   9. Peritreme ending in a simple, hooked chamber.....................  P. ( T.) uncata( Flechtmann & Moraes, 1991) ( Brazil)  - Peritreme ending in anastomosing chambers forming a globular structure........  P. ( T.) lippiae  Baker& Tuttle, 1994( USA)   10. Legs I at most 1.5 times as long as idiosoma (not including gnathosoma).............  P. ( T.) lupini McGregor, 1950( USA)  - Legs I at least twice as long as idiosoma (not including gnathosoma)............................................ 11   11. Legs I about twice as long as idiosoma (not including gnathosoma)............................................. 12  - Legs I well over twice as long as idiosoma (not including gnathosoma).......................................... 14   12. Stylophore with numerous anterior papillae.................................  P. ( T.) tribulus Chaudhri, 1972( Pakistan)  - Stylophore smooth.................................................................................... 13   13. Peritreme ending in a simple chamber............................................  P. ( T.) harti Ewing, 1909( USA)  - Peritreme ending in anastomosing chambers forming a globular structure.....  P. ( T.) hispaniola  n. sp.( Dominican Republic)   14. Stylophore with an anteromedian notch and papillate; tibia I with 27 setae; tarsus I with 30 setae............................................................................................  P. ( T.) nocitus Chaudhri, 1972( Pakistan)  - Stylophore without anteromedian notch, papillate or not; tibia I with 23–26 setae; tarsus I with 25–28 setae............. 15   15. Peritreme enlarged and hooked distally; stylophore without papillae.......  P. ( T.) kleptes Kamran & Afzal, 2004( Pakistan)  - Peritreme ending in anastomosing chambers, forming a heart shaped bulb; stylophore papillate....................... 16   16. Dorsal idiosomal striation simple; leg IV ca 1200 µm long...................  P. ( T.) afzali Sabri & Afzal, 2007( Pakistan)  - Dorsal idiosomal striation dotted; leg IV ca. 938 µm long........................  P. ( T.) cardi Chaudhri, 1972( Pakistan)