Ologamasus
Creators: name: Santos, Jandir C.
name: Castilho, Raphael C.
name: Silva, Edmilson S.
name: De Moraes, Gilberto J.
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Mesostigmata
Ologamasidae
Ologamasus

description: Key to world species of Ologamasus, based on adult females
1. Most dorsal idiosomal setae spatulate and pilose............................................................. 2
- Most dorsal idiosomal setae aciculate and smooth (Fig. 5)..................................................... 7
2. Anterior margin of epistome with a median extension flanked by one or two pairs of spine-like extensions.............. 3
- Anterior margin of epistome only with a median extension.................................................... 5
3. Dorsal idiosomal shield with 30 pairs of setae................ Ologamasus simplicitus Karg & Schorlemmer, 2009; Brazil
- Dorsal idiosomal shield with 40-41 pairs of setae............................................................ 4
4. Setae J 3 and J 4 as long as distance between their bases and bases of subsequent J setae; seta Z 5 about 1.6 times as long as J 5.................................................... Ologamasus cananeiae Silva, Moraes & Krantz, 2007; Brazil
- Setae J 3 and J 4 at least 1.2 times as long as distance between their bases and bases of subsequent J setae; seta J 5 as long as Z 5..................................................................... Ologamasus foliatus Karg, 1976a; Chile
5. Para-anal seta about twice as long as J v5. ............... Ologamasus trituberculatus Karg & Schorlemmer, 2009; Brazil
- Para-anal seta about as long as Jv5....................................................................... 6
6. Seta Jv 4 about 0.5 times as long as distance between its base and base of Jv 5........................................................................................... Ologamasus brevidigitus Karg & Schorlemmer, 2009; Brazil
- Seta Jv 4 about as long as distance between its base and base of Jv 5.......... Ologamasus aberrans (Berlese, 1888); Brazil
7. Dorsal shield J setae at most 0.8 times as long as distance between their bases and bases of subsequent J setae........... 8
- Dorsal shield J setae at least as long as distance between their bases and bases of subsequent J setae.................. 12
8. Ventrianal shield fused with dorsal shield only by a narrow area posterior to anus..................................................................................... Ologamasus brevisetosus Karg & Schorlemmer, 2009; Ecuador
- Ventrianal shield totally fused with dorsal shield, except anterolaterally.......................................... 9
9. Dorsal idiosomal setae minute (2–4 µm)............................ Ologamasus microcrinis (Karg, 1979); Argentina
- Dorsal idiosomal setae short, but not minute (≥ 10 µm)...................................................... 10
10. Posterior margin of genital shield truncate; ventrianal shield smooth............ Ologamasus distorta (Karg, 1976a); Chile
- Posterior margin of genital shield convex; ventrianal shield striate............................................. 11
11. Ventrianal shield with eight pairs of setae (Jv 2 present)................... Ologamasus lanceolatus (Karg, 1976a); Chile
- Ventrianal shield with seven pairs of setae (Jv 2 absent)..................... Ologamasus cavei Sheals, 1962; Argentina
12. Ventrianal shield fused with dorsal shield only by a narrow area posterior to anus................................. 13
- Ventrianal shield totally fused with dorsal shield, except anterolaterally (Fig. 6)................................... 17
13. Ventrianal shield with seven pairs of setae (Zv 3 present)................. Ologamasus membranosus Karg, 1976a; Chile
- Ventrianal shield with six pairs of setae (Zv 3 absent)........................................................ 14
14. Opisthonotal region of dorsal idiosomal shield with 20 pairs of setae (R 1- R 5 present).............................. 15
- Opisthonotal region of dorsal idiosomal shield with 16 pairs of setae (R 1- R 4 absent)............................... 16
15. Setae j 6 and J 1 respectively at most 0.9 times as long as distance between their bases and bases of J 1 and J 2; ventrianal shield smooth...................................................... Ologamasus striolatus (Berlese, 1916); Argentina
- Setae j 6 and J 1 respectively at least 1.5 times as long as distance between their bases and bases of J 1 and J 2,; ventrianal shield imbricate....................................................... Ologamasus striolatosimilis Karg, 1976a; Chile
16. Reticulation of dorsal idiosomal shield with transversally elongate cells; podonotal region of dorsal idiosomal shield with 21 pairs of setae (s 1, s 4 and r 1 absent); sternal shield reticulate..... Ologamasus postpilus Karg & Schorlemmer, 2009; Brazil
- Reticulation of dorsal idiosomal shield with roundish cells; podonotal region of dorsal idiosomal shield with 20 pairs of setae (s 1, s 4, r 1 and r 2 absent); sternal shield longitudinally striate. Ologamasus latoventer Karg & Schorlemmer, 2009; Paraguay
17. Anterior margin of epistome convex and denticulate; genital shield wider than long (including membranous flap); ventrianal shield with seven pairs of setae (not bearing Jv 5)......................... Ologamasus testudinis (Karg, 1976b); Chile
- Anterior margin of epistome with a median extension variously denticulate (Fig. 3); genital shield as long as wide (including membranous flap) (Fig. 6); ventrianal shield with eight pairs of setae (bearing Jv 5) (Fig. 6)......................... 18
18. Sternal shield imbricate; genital shield striate laterally, smooth elsewhere; unsclerotised strip of integument separating ventria- nal from dorsal shield extending to region between Zv 2 and Zv 3 (Fig. 18)........... Ologamasus delaliberai n. sp.; Brazil
- Sternal shield reticulate near st 1 and with longitudinal and parallel striae elsewhere; genital shield striate; unsclerotised strip of integument separating ventrianal from dorsal shield extending almost to Jv 5..................................... 19
19. Podonotal region of dorsal idiosomal shield with 21 pairs of setae (s 1, s 4 and r 1 absent); opisthonotal region of dorsal idio- somal shield with 20 pairs of setae (Z 4 and R 5 present); setae Jv 3 and Zv 2 at least as long as distance between their bases and bases of Jv 4 and Zv 3 respectively................................. Ologamasus simplicior (Berlese, 1914); Argentina
- Podonotal region of dorsal idiosomal shield with 20 pairs of setae (z 4, s 1, s 4 and r 1 absent); opisthonotal region of dorsal idio- somal shield with 18 pairs of setae (Z 4 and R 5 absent) (Fig. 5); setae Jv 3 and Zv 2 at most 0.7 times as long as distance between their bases and bases of Jv 4 and Zv 3 respectively (Fig. 6)............................ Ologamasus lucasi n. sp.; Brazil
description: Published as part of Santos, Jandir C., Castilho, Raphael C., Silva, Edmilson S. & De Moraes, Gilberto J., 2015, Two new species of Ologamasus (Acari: Mesostigmata: Ologamasidae) from Brazil with a key to the world species of the genus, pp. 267-277 in Zootaxa 4058 (2) on pages 275-276, DOI: 10.11646/zootaxa.4058.2.8, http://zenodo.org/record/244241