Blattisocius
Creators: name: Britto, Erika P. J.
name: Lopes, Paula C.
name: De, Gilberto J.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Mesostigmata
Ascidae
Blattisocius

description: Key of species of Blattisocius of the world
Blattisocius urticana (Nesbitt, 1954) was not included because the females of this species have not been described.
1. Dorsal shield with 31 pairs of setae (z1 absent)............. Blattisocius apisassociae Chinniah & Mohanasundaram, 1995
- Dorsal shield with 32 or more pairs of setae (z1 present)..................................................... 2
2. Ventrianal shield with three pairs of pre-anal setae........................................................... 3
- Ventrianal shield with four pairs of setae pre-anal............................................................ 9
3. Chelicera with movable and fixed digits of similar lengths.................................................... 4
- Chelicera with movable digit much longer than fixed digit..................................................... 6
4. Peritreme long, extending to level of anterior margin of coxa I; ventrianal shield roughly triangular...................................................................................... Blattisocius daci (Narayanan & Ghai, 1961)
- Peritreme short, extending at most to level of posterior margin of coxa III; shield ventrianal roughly pentagonal.......... 5
5. Dorsal shield mostly smooth, with few transverse striae in opisthonotal region; s2 inserted on dorsal shield; JV4 absent....................................................................... Blattisocius capsicum Basha & Yousef, 2000
- Dorsal shield reticulate; seta s2 inserted on unsclerotised cuticle; JV4 present.................... Blattisocius everti n. sp.
6. Movable cheliceral digit only with apical tooth................................. Blattisocius patagiorum Treat, 1966
- Movable cheliceral digit with one or more teeth in addition to apical tooth........................................ 7
7 Peritreme long, extending to level of posterior margin of coxa II................... Blattisocius tarsalis (Berlese, 1918)
- Peritreme short, extending to level of posterior margin of coxa III............................................... 8
8. Dorsal shield with transverse striae; fixed cheliceral digit with two teeth in addition to apical tooth.......................................................................................... Blattisocius apis Basha & Yousef, 2000
- Dorsal shield reticulate; fixed cheliceral digit with three teeth in addition to apical tooth..... Blattisocius keegani Fox, 1947
9. Movable cheliceral digit only with apical tooth............................................................. 10
- Movable cheliceral digit with one or more teeth in addition to apical tooth....................................... 11
10. Seta st4 inserted on sternal shield; dorsal setae only slightly surpassing bases of corresponding subsequent setae.................................................................................... Blattisocius edentata (Karg, 1976)
- Seta st4 inserted on unsclerotised cuticle; dorsal shield setae long, some reaching bases of respective subsequent setae.................................................................. Blattisocius aegypticus Nasr, Nawar & Afifi, 1988
11. Setae st3 and st4 of each side inserted on a platelet attached by a narrow bridge to postero-lateral angle of sternal shield.. 12
- Seta st3 inserted on sternal shield and st4 inserted on unsclerotised cuticle...................................... 14
12. Fixed cheliceral digit with one tooth in addition to apical tooth................. Blattisocius incisus Bhattacharyya, 1977
- Fixed cheliceral digit with three or more teeth in addition to apical tooth........................................ 13
13. Fixed cheliceral digit with three teeth in addition to apical tooth; movable digit with one tooth in addition to apical tooth; j3, j6, J2 and Z4 at most slightly longer than distance to corresponding subsequent seta..... Blattisocius dentriticus (Berlese, 1918)
- Fixed cheliceral digit with more than ten teeth in addition to apical tooth; movable digit with two teeth in addition to apical tooth; j3, j6, J2 and Z4 at least 1.5 times as long as distance to corresponding subsequent setae.................................................................................................... Blattisocius dolichus Ma, 2006
14. Dorsal shield setae long, surpassing bases of corresponding subsequent setae; st3 inserted into a pair of platelets separated from main body of sternal shield; movable cheliceral digit with three teeth in addition to apical tooth........................................................................................ Blattisocius quadridentatus Haines, 1978
- Dorsal shield setae short, not reaching bases of corresponding subsequent setae; st3 inserted on sternal shield; movable chelic- eral digit with two teeth in addition to apical tooth......................................................... 15
15. Seta Z5 about 1.6 times as long as distance between their bases; with one pair of large and wedge-shaped metapodal shields..................................................................... Blattisocius changjiangensis (Ma, 2006)
- Seta Z5 about 0.9 times as long as the distance between their bases; with 2 pairs of small, club-shaped metapodal shields............................................................................ Blattisocius mali (Oudemans, 1929)
description: Published as part of Britto, Erika P. J., Lopes, Paula C. & De, Gilberto J., 2012, Blattisocius (Acari, Blattisociidae) species from Brazil, with description of a new species, redescription of Blattisocius keegani and a key for the separation of the world species of the genus, pp. 33-51 in Zootaxa 3479 on page 49, DOI: 10.5281/zenodo.214695