Fannia pretiosa-group (Diptera: Fanniidae) from Mexico: six new species from the Mexico Transition Zone and an identification key Author Gomes, Lucas R. P. Escuela Nacional de Ciencias Forenses, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica s / n, Ciudad Universitaria, Coyoacán, Mexico City, Mexico. Author Pedraza-Lara, Carlos 0000-0001-7924-5286 Escuela Nacional de Ciencias Forenses, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica s / n, Ciudad Universitaria, Coyoacán, Mexico City, Mexico. & https: // orcid. org / 0000 - 0001 - 7924 - 5286 text Zootaxa 2023 2023-04-13 5264 2 185 204 http://dx.doi.org/10.11646/zootaxa.5264.2.2 journal article 10.11646/zootaxa.5264.2.2 1175-5326 7836396 97A03469-519D-49D7-8D0E-2F6648CCB922 Identification key to the male of the Mexican Fannia pretiosa -group species 1. Mid tibia with anterior apical seta ⅔ the length of basitarsus ( Fig. 1A ). Hind coxa with two posterior setae ( Fig. 1C )...... 2 -. Mid tibia with anterior apical seta half the length of basitarsus ( Fig. 1B ). Hind coxa bare posteriorly (except in F. grisalesae sp. nov. which has 0–1 setae) ( Fig. 1D )...................................................................... 3 2. Fore tarsi yellow and enlarged dorsoventrally ( Fig. 7D ). Mid tibia without posterodorsal seta. Hind tibia with 4 anteroventral setae ( Fig. 7F )................................................................. Fannia amplitarsis sp. nov. -. Fore tarsi brown and not enlarged dorsoventrally. Mid tibia with 1 submedian posterodorsal seta. Hind tibia with 3 anteroventral setae ( Fig. 10F )................................................................... Fannia bisetata sp. nov. 3. Syntergosternite with 2 pairs of curved lateral setae twice longer than sternite 5 ( Fig. 1E )............................ 4 -. Syntergosternite without any pair of curved lateral setae longer than sternite 5 ( Fig. 1F )............................. 5 4. Wing hyaline ( Fig. 2B )......................................................... Fannia abdominiseta sp. nov. -. Wing brownish ( Fig. 8B ).......................................................... Fannia anguliseta sp. nov. 5. Hind femur strongly curved dorsoventrally ( Fig. 9F ; 12F ). Tuft of posteroventral setae curled apically ( Fig. 9F ).......... 6 -. Hind femur slightly curved dorsoventrally ( Fig. 11F ; 13F ). Tuft of posteroventral setae straight apically................ 7 6. Fore tarsi brown ( Fig. 9D ). Mid tibia without posterodorsal setae. Hind femur without a tuft of anteroventral setae ( Fig. 9F ). Mid basitarsi not enlarged. Hind tibia with 4 anteroventral setae ( Fig. 9F )..................... Fannia arcuata Chillcott -. Fore tarsi yellow, except tarsomere 1 and 5 brown ( Fig. 12D ). Mid tibia with 1 submedian seta. Hind femur with a tuft of anteroventral setae ( Fig. 12F ). Mid basitarsi with the basal fourth enlarged and covered with four long and thick curved setae ( Fig. 1G ). Hind tibia with 5 anteroventral setae ( Fig. 12F )................................ Fannia grisalesae sp. nov. 7. Fore tarsi yellow, except for basal half of tarsomere 5 brown ( Fig. 11D ). Mid basitarsi enlarged ventrally ( Fig. 1H )...................................................................................... Fannia gilvitarsis Chillcott -. Fore tarsi yellow, except for tarsomere 5 brown ( Fig. 13D ). Mid basitarsi not enlarged ventrally.................................................................................................. Fannia pedregalensis sp. nov.