Two new species of the genus Geckobia Mégnin, 1878 (Acariformes, Prostigmata, Pterygosomatidae) from Peru Author Machado, Ingrid B. Author Gazêta, Gilberto S. Author Pérez, José Author Cunha, Rodolfo Coleção Micológica de Trichocomaceae, CMT-FIOCRUZ, Rio de Janeiro-RJ, CEP 21040 - 360, Brazil. Author Giupponi, Alessandro P. De L. Programa de Pós-graduação Lato sensu em Entomologia Médica, IOC / FIOCRUZ, Manguinhos, Rio de Janeiro-RJ, CEP 21040 - 360, Brazil text Zootaxa 2019 2019-08-19 4657 2 333 351 journal article 22541 10.11646/zootaxa.4657.2.6 32bc8193-4779-4255-8766-8a34e0888442 1175-5326 3772309 13D49F3C-1E41-42DE-A796-C9756898895E Key to species of Geckobia from the Americas 1. Propodonotal shield with a prominent concave recess at base; with weakly defined ellipsoid opisthosomal plate that encompasses the genitoanal region; palp phaneres ul’ , ul” , acm and sul present, setiform and five times greater than the length of the article ( Figs. 3–5 ).......................................................................... G. adina n. sp. - Propodonotal shield, genitoanal region and palp phaneres not as described above................................... 2 2. Opisthosoma with longitudinal folds positioned laterally and contouring the entire idiosoma; a trifurcate spine at the base of the palp claw; with 6 pairs of genital setae and 7 pairs of aggenital setae; 13 setae on tarsi II–IV ( Figs. 27–30 ).. G. circumdata n. sp. - Opisthosoma, base of the palp claw and number of pairs of genital and aggenital setae not as described above; 10 setae on tarsi II–IV............................................................................................... 3 3. Coxae of legs III–IV with a total of 4 or fewer serrated setae. Coxae I–II with 3 or fewer serrated setae. Femora I–IV formula: (2-1-1-1)...................................................................... G. keegani Lawrence, 1953 . - Coxae of legs III–IV with a total of 5 serrated setae. Coxae I–II with 3 or 4 setae. Femora I–IV formula: (2-2-2-2) or (3-2-2- 2)................................................................................................. 4 4. Trochanters I–II with dorsal setae................................................ G. bataviensis Vitzthum, 1926 . - Trochanter I with or without dorsal seta, trochanter II lacking dorsal seta......................................... 5 5. Propodonotal shield with 5 pairs of setae. Anogenital area with 8 pairs of setae..... G. aureae Quiroz-Gutiérrez et al. , 2015 . - Propodonotal shield with (<5) or (> 5) pairs of setae. Anogenital area with fewer than 8 pairs of setae................. 6 6. Anogenital area with 6 pairs of dorsal setae, including g1–g3........................... G. hemidactyli Lawrence, 1936 - Anogenital area with fewer or greater than 6 pairs of setae distributed dorsally or ventrally........................... 7 7 . Trochanters I–IV formula (2-1-1-1), dorsal seta present on trochanter I. Femora I–IV formula: (2-2-2-2). Dorsal setae present only on trochanter I............................................................ G. tarentole De la Cruz, 1973 . - Trochanters I–IV formula (1-1-1-1), dorsal seta absent on all trochanters. Femora I–IV formula: (3-2-2-2)............... 8 8 . Palp genu with dG seta serrated.......................................... G. guyanensis Floch & Abonnenc, 1944 . - Palp genu with dG seta smooth.......................................................................... 9 9 . Palp femur with dF seta smooth......................................................................... 10 - Palp femur with dF seta serrated........................................................................ 11 10 . Setal formula of genua I–IV (5–4–3–3[2]) and femora I–IV (5–4–3–3[2]). Five pairs of pseudanal setae. Chelicera (195– 210μm)........................................................................... G. nitidus Fajfer, 2015 . - Setal formula of genua I–IV (5–4–3–3) and femora I–IV (5–4–3–2). Six pairs of pseudanal setae. Chelicera (135–140μm)............................................................................... G. zapallarensis Fajfer, 2015 . 11 . Genua formula I–IV: (0-0-0-1).................................... G. leonilae Hoffmann & Morales-Malacara, 1986 . - Genua formula I–IV: (1-0-0-0) or (1-0-0-1)................................................................ 12 12 . Setal formula of genua I–IV (1-0-0-0). Coxae formula (2-2-4-3).......................... G. gerrhopygus Fajfer, 2015 - Setal formula of genua I–IV (1-0-0-1). Coxae formula (1-2-2-3) or (2-2-2-3)..................................... 13 13 . Coxae I with one seta. Propodonotal shield represented by two small fragments and with a pair of robust and serrated setae between these fragments................................................. G. manaensis Floch & Abonnenc, 1945 . - Coxae I with two setae. Propodonotal shield with discrete recess at base............ G. cayennensis Floch & Fauran, 1955 .