Papillacarus (Vepracarus), 1965

Arun, A. & Ramani, N., 2020, Two remarkable new species of oribatid mites (Acari: Oribatida) from Acacia litter of Kerala, India, Zootaxa 4877 (3), pp. 539-558 : 548-549

Key to the adults of known species of Papillacarus (Vepracarus) of the world

1 Anal and adanal plates separated throughout their length...................................................... 2

- Anal and adanal plates separated anteriorly and fused posteriorly.............................................. 20

2 Notogastral setae tree shaped............................................................................ 3

- Notogastral setae smooth, setiform, barbed or ciliate......................................................... 8

3 Notogaster with thickly punctate tubercles [ India, Vietnam].................... P. (V.) cornutus ( Sarkar & Subías, 1984)

- Notogaster with papilli................................................................................. 4

4 an 2 shorter than the distance between an 1 and an 2 ............................................................ 5

- an 2 as long as or longer than the distance between an 1 and an 2.................................................. 7

5 Notogastral bands absent [Cáucaso]............................................... P. (V.) abchasicus Tarba, 1985

- Notogastral bands present............................................................................... 6

6 Sensillus with 9–10 long pectinations; notogastral band S 5 present [ China]. P. (V.) hexagonus Ren, Yang, Liang & Xie, 2018

- Sensillus with 13–14 long pectinations; notogastral band S 5 absent [ Japan, Tahiti. Tongatapu, India, Philippines, Vietnam, Iran]......................................................................... P. (V.) hirsutus ( Aoki, 1961)

7 All genital setae branched; exa as long as or longer than the distance between exa and in [ Korea]............................................................................................... P. (V.) koreanus ( Mahunka, 1973)

- Anterior pairs of genital setae branched and posterior pairs simple; exa shorter than the distance between exa and in [ Senegal, Vietnam]...................................................................... P. (V.) gueyeae ( Pérez-Íñigo, 1989)................................................................................................

8 ss with long branches; notogastral setae variable in size and nature.............................................. 9

- ss with short barbs; notogastral setae c 1, d 1 and e 1 thin and smooth, others ciliate [ Iran, Spain]............................................................................................. P. (V.) chamartinensis Pérez-Íñigo, 1967

9 All primary notogastral setae barbed, branched or ciliate..................................................... 10

- At least two pairs of primary notogastral setae smooth....................................................... 18

10 Notogaster possess polygonal ornamentation.............................................................. 11

- Notogaster without polygonal ornamentation, either with papilli or tubercles..................................... 12

11 Setae c 1, d 1, f 1 almost same in length [ Brazil]......................... P. (V.) parapolysetosus Ermilov & Tolstikov, 2015

- Setae c 1, d 1, f 1 differ in length (c 1> d 1> f 1) [ Vietnam]................... P. (V.) polysetosus Ermilov, Anichkin & Wu, 2012

12 Seta in with long branches [ Indonesia]............................................. P. (V.) ramosus Balogh, 1961

- Seta in setiform, ciliate................................................................................ 13

13 Notogastral bands indistinct............................................................................ 14

- Notogastral bands distinct............................................................................. 16

14 Rostrum more or less rectilinear with median angular incision [ Vietnam]............................................................................................... P. (V.) whitteni Fernández, Theron, Rollard & Leiva, 2015

- Rostrum narrowly round or truncate, without median incision................................................. 15

15 Genital setae very small, without branches [ China, Philippines]....................... P. (V.) cruzae Corpuz-Raros, 1979

- Antero-lateral pairs and two postero-lateral pairs of genital setae long and smooth, rest with short cilia [ Vietnam]........................................................................................ P. (V.) luteus Ermilov, 2015

16 All genital setae branched or barbed [ China]................................. P. (V.) konglinensis Chen & Yang, 2011

- Setae g 7, g 8 and g 10 smooth, others branched................................................................ 17

17 Neotrichal setae present from e series; setae exp, in and le sub- equal in length [ China, Iran]............................................................................................... P. (V.) punctatus (Hu & X. Wang, 1990)

- Neotrichal setae present from c series; seta exp longer than le and in [ China]............................................................................................. P. (V.) jinggangshanensis (Y. Chen, Yang & Liang, 2010)

18 All prodorsal setae sub-equal in length [ Ukraine].................................... P. (V.) akimovi Sergienko, 1992

- Prodorsal setae variable in length........................................................................ 19

19 Seta in as long as the marginal notogastral setae; ss with 16 long branches [ Philippines].................................................................................................. P. (V.) ramirezae ( Corpuz-Raros, 1979)

- Seta in much smaller than the marginal notogastral setae; ss with 11–12 long branches [ Iran, Thailand]................................................................................................ P. (V.) ogawai ( Aoki, 1965)

20 Prodorsum and notogaster covered with large, finely punctate tubercles [ India]................ P. (V.) acaciensis sp. nov.

- Prodorsum and notogaster bear pappilli [ Bermuda, Cuba, Mexico, St. Lucia]......... P. (V.) incompletus ( Mahunka, 1985)