Cosmolaelaps

Duarte, Adriane Da Fonseca, Moreira, Grazielle Furtado, Cunha, Uemerson Silva Da & Moraes, Gilberto José De, 2017, Cosmolaelaps Berlese (Mesostigmata: Laelapidae) from southern Brazil, with a new record of a heteromorphic male, description of a new species, and a key to the species reported from that country, Zootaxa 4286 (4), pp. 535-544 : 543

Key to separate the Cosmolaelaps species reported from Brazil

1. Podonotal and opisthonotal regions of dorsal shield with 22 and 17 pairs of setae respectively ( Fig. 6 )..................2

- Dorsal shield setation not as above....................................................................... 10

2. Epistome acuminate...................................................................................3

- Epistome convex or with a median extension................................................................4

3. Seta j5 about twice as long as distance j5–z5; J4 about 1.1 times as long as distance J4–J5; Z5 about 1.5 times as long as J5 ................................................................. C. oliverai Moreira, Klompen & Moraes, 2014

- Seta j5 about 1.6 times as long as distance j5–z5; J4 about 0.75 times as long as distance J4–J5; Z5 about 1.7 times as long as J5.............................................................................. C. guttulata ( Karg, 1978)

4. Setae Z5 and occasionally J5 barbed.......................................................................5

- Setae Z5 and J5 not barbed..............................................................................7

5. Epistome denticulate laterally, with two relatively long, smooth, median extensions............. C. furcatoides Karg, 1981

- Epistome with denticles about uniformly distributed along the margin, without long median extensions.................6

6. Dorsal shield with most dorsal setae dagger-shaped; distance j4–j5 about 2.3 times as long as j4 ..... C. brevistilis Karg, 1978

- Dorsal shield with most dorsal setae spatulate-mucronate; distance j4–j5 about 0.9 times as long as j4 .................................................................................. C. barbatus Moreira, Klompen & Moraes, 2014

7. Anterior margin of sternal shield and pre-sternal region unsclerotised; dorsal setae scimitar-shaped or spatulate-mucronate.. 8

- Anterior margin of sternal shield and pre-sternal region sclerotised; with pre-sternal plates fused or not to sternal shield dorsal setae scimitar-shaped................................................................................... 9

8. Dorsal shield setae scimitar-shaped................................... C. busolii Moreira, Klompen & Moraes, 2014

- Dorsal shield setae spatulate-mucronate.................................................. C. pampaensis sp. nov.

9. Genital shield completely reticulate, epistome with distinct denticles, the median of which well separate from and larger than others................................................... C. jaboticabalensis Moreira, Klompen & Moraes, 2014

- Posterior third of genital shield smooth, anterior margin of epistome with uniform, tiny denticles................................................................................................ C. paulista Freire & Moraes, 2007

10. Dorsal shield hypertrichous (opisthonotal region with 49 pairs of setae)...................... C. pugiocuspis Karg, 1981

- Dorsal shield not hypertrichous (with fewer than 39 pairs of setae).............................................. 11

11. Epistome with denticles of similar lengths, dorsal shield with 35 pairs of setae................. C. panniculus Karg, 1981

- Epistome with denticles of similar lengths, except median denticle, more distinctly elongate, dorsal shield with 37 or 38 pairs of setae.............................................................................................12

12. Dorsal shield with 37 pairs of setae (r5 and px2 missing).............................. C. weeversi ( Oudemans, 1926)

- Dorsal shield with 38 pairs of setae (z5 missing)......................................... C. cassoidea Karg (1981)

Figures

FIGURES 6 – 13. Cosmolaelaps pampaensis, female. 6. dorsal idiosoma; 7. peritreme; 8. ventral idiosoma; 9. spermatheca; 10. epistome; 11. hypostome; 12. chelicera; 13. leg IV.