Panonychus, Yokoyama, 1929

Arabuli, Tea, Matsuda, Tomoko, Negm, Mohamed W. & Gotoh, Tetsuo, 2020, Complementary description of Panonychus caricae Hatzinikolis, 1984, with the resurrection of the genus Sasanychus Ehara, 1978 (Acari, Prostigmata Tetranychidae), Zootaxa 4881 (3), pp. 515-531 : 528

Key to the world species of the genera Panonychus * and Sasanychus

1. Dorsal setae on idiosoma set on strong tubercles; opisthosomal striae longitudinal; tibia I with 7 and tibia II with 5 tactile setae................................................................................... Panonychus ... 3

- Dorsal setae on idiosoma not on tubercles; opisthosomal striae transversal; tibia I with 9 and tibia II with 8 tactile setae............................................................................................ Sasanychus ... 2

2. Tarsus II with 3 tactile setae and 1 solenidion proximal to duplex seta; aedeagus slightly sigmoid and with truncate tip; reported on dwarf bamboo [ Sasa senanensis (Franch. & Sav.) and Sasa sp.; Poaceae ]; Bangladesh & Japan..................................................................................................... S. akitanus ( Ehara, 1978)

- Tarsus II with 1 tactile seta and 1 solenidion proximal to duplex seta; aedeagus with almost straight with prominent process on dorsal margin and distal portion of aedeagus almost straight; reported on dwarf bamboo [ Sasa chartaceae (Makino) ; Poaceae ]; Japan...................................................................... S. pusillus Ehara & Gotoh, 1987

3. Genua I and II each with 5 tactile setae.................................................................... 4

- Genua I and II each with 4 tactile setae, genua III and IV each with 2 tactile setae; reported on bamboo ( Sasa borealis (Hack.) ; Poaceae ) and Sasa senanensis (Franch. & Sav.) ; Japan.......................... P. bambusicola Ehara & Gotoh, 1991

4. Genu III with 3 and genu IV with 2 tactile setae............................................................. 5

- Genu III and genu IV each with 3 tactile setae............................................................... 6

5. Aedeagus bent dorsad and tip curved towards posterior, with bent portion as long as dorsal margin of shaft; reported on Compositae, Cucurbitaceae, Leguminosae , Malvaceae , Moraceae , Rosaceae and Urticaceae ; USA, Brazil, China, Taiwan, Korea & Japan (Okinawa Pref.)............................................................... P. caglei Mellottt, 1968

- Aedeagus bent dorsad with the tip strongly recurved towards anterior; reported on Malus domestica (Rosaceae) ; Peru.............................................................................. P. inca De Vis & De Moraes, 2002

6. Aedeagus with ball-shaped knob distally, shaft of aedeagus angulate or elbowed, distal portion of neck of shaft with distinct ventral concavity; reported on Achyranthes aspera (Amaranthaceae) , Vitis sp. ( Vitaceae ); Taiwan...................................................................................................... P. globosus Tseng, 1974

- Aedeagus without ball-shaped knob distally................................................................ 7

7. Female with tactile seta of duplex seta on tarsus II longer than solenidion; aedeagus curved dorsad, with straight, tapering distal part; reported on Ulmus davidiana (Ulmaceae) ; Japan............................. P. thelytokus Ehara & Gotoh, 1992

- Female with tactile seta of duplex seta on tarsus II shorter than solenidion; aedeagus otherwise....................... 8

8. Female dorsal setae f 2 and h 1 more or less similar in length (difference not more than 5 µm).......................... 9

- Female dorsal seta f 2 clearly longer than h 1 (difference approx. 10 µm or more)................................... 11

9. Palptarsus solenidion (ω) longer than terminal sensillum (suζ); dorsal setae f 2 half as long as f 1; aedeagus bent dorsad, with weakly sigmoid distal part strongly tapering and twice as long as dorsal margin of the shaft; reported on Caricaceae, Leguminosae , Meliaceae , Menispermaceae , Moraceae , Oleaceae , Passifloraceae , Rosaceae , Rutaceae and Taxaceae ; Australia, Papua New Guinea, Myanmar, China, Taiwan, Thailand & India................................ P. elongatus Manson, 1963

- Palptarsus solenidion (ω) shorter than terminal sensillum (suζ); ratio between female dorsal setae f 1 and f 2 (f 1 / f 2) more than 2.5; aedeagus otherwise.................................................................................. 10

10. Aedeagus bent dorsad, with weakly sigmoid tapered distal part longer than dorsal margin of the shaft, and bent at an angle of approx. 50° to the ventral margin of the shaft; female dorsal seta e 2 notably shorter than e 1; ratio between female dorsal setae sc 1 and h 1 (sc 1 / h 1) about 6.8; reported on Osmanthus (Oleaceae) ; China & Japan.......... P. osmanthi Ehara & Gotoh, 1996

- Aedeagus bent dorsad, with weakly sigmoid tapered distal part longer than dorsal margin of the shaft, and bent at an angle between 67–78° to the ventral margin of the shaft (often appearing close to right angles); female dorsal seta e 2 approximately same length as e 1; ratio between female dorsal setae sc 1 and h 1 (sc 1 / h 1) approx. 5.3; reported on numerous host plants; worldwide................................................................................. P. citri ( McGregor, 1916)

11. Female dorsal setae linear and lanceolate, not curved; reported on Malus domestica (Rosaceae) ; Taiwan................................................................................................ P. lishanensis Tseng, 1990

- Female dorsal setae strongly curved..................................................................... 12

12. Female dorsal seta sc 1 more than 200 µm long, ratio sc 1 / h 1 approx. 5 or more; aedeagus bent dorsad, with short weakly sigmoid distal part about as long as dorsal margin of the shaft; reported on some Cannabaceae , Menispermaceae , Moraceae and Rosaceae ; Iran & Japan................................................................. P. mori Yokoyama, 1929

- Female dorsal seta sc 1 less than 200 µm long; sc 1 / h 1 less than 5, aedeagus bent dorsal, with distal part longer than dorsal margin of the shaft......................................................................................... 13

13. Female dorsal seta sc 1 less than 150 µm long, ratio sc 1 / h 1 approx. 3.3; reported on Ficus carica (Moraceae) ; Georgia, Armenia & Azerbaijan.................................................................. P. hadzhibejliae ( Reck, 1947)

- Female dorsal seta sc 1 more than 150 µm long, ratio sc 1 / h 1 more than 4......................................... 14

14. Female dorsal seta c 3 more than 100 µm long, seta f 2 approx. 66 µm long, ratio sc 1 / f 2 approx. 2.8; reported on various hosts; worldwide........................................................................... P. ulmi ( Koch, 1836)

- Female dorsal seta c 3 less than 100 µm long, seta f 2 50 µm long, ratio sc 1 / f 2 approx. 3.5; reported on Ficus carica (Moraceae) ; Greece...................................................................... P. caricae Hatzinikolis, 1984