Fannia pedregalensis Gomes & Pedraza-Lara 2023, sp. nov.
Creators: name: Gomes, Lucas R. P.
name: Pedraza-Lara, Carlos
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Fanniidae
Fannia
Fannia pedregalensis

description: Fannia pedregalensis sp. nov.
(Figs 1F, 3H, 4H, 5H, 6H, 13, 14, 15, 16)
Diagnosis. Fore tarsomere 1–4 white-yellowish, tarsomere 5 brown (Fig. 13D). Hind coxa bare. Hind femur slightly curved with pre-apical swelling on v surface, with a tuft of long pv setae (twice longer than width of femur) on the swelling, becoming shorter towards the base (the shorter setae about half width of femur) (Fig. 13F). Wing slightly brownish (Fig. 13C).
Description. Holotype male. Body length: 6.0 mm. Wing length: 5.2 mm.
Head. Eye short and sparsely setulose. Ocellar triangle black; ocellar setae proclinate and developed (as long as frontal setae). Frontal vitta velvety black, golden pruinose, at the narrowest point two times wider than anterior width of ocellus (Fig. 13A). Frontal setae 17. Fronto-orbital plate black, with silver pruinosity. Parafacial bare, brown with silver pruinosity. Frontogenal suture and gena silver pruinose. Gena brownish (Fig. 13A). Pedicel with dorsal seta developed, with about a third of the length of arista. Postpedicel black, silver pilose, 3 times longer pedicel.
Thorax. Scutum without vittae, with inconspicuous silver pruinosity on postpronotal and notopleural regions (Fig. 13B).Acrostichal setulae biserial presuturally and triserial postsuturally. Dorsocentrals 2+3, long, the posteriormost postsutural pair slightly longer than the others. Prealar 2, the anterior one slightly longer. Katepisternum with about 10 long and thick setae ventrally (Fig. 13C).
Wing. Brownish, with the upper third between vein C and vein R 4+5 darker (Fig. 13B). Calypters white. Haltere yellow, base of stem light brown.
Legs. Black, pulvilli brownish and tarsi brown, except for the fore tarsomeres 1–4 which are white-yellowish. Fore tarsomere 5 with short v setulae (Fig. 13D). Mid femur with 1 row of ad to d setae, with 1 row of decreasing av from base to apex; a row of long p and pv setae (thicker on the apical third) (Fig. 13E). Mid tibia with 1 submedian ad, 1 median pd, 1 strong and long preapical d, 1 apical seta on a, pd, p and v (v longer, similar to d preapical seta) (Fig. 13E). Hind coxa bare on posterior margin. Hind femur slightly curved with pre-apical swelling on v surface, with a tuft of long setae on the pv surface which continuous in a row decreasing in length basally, 1 row of ad setae, 1 row of av setae (absent on the pre-apical swelling), 1 long preapical av setae, 2 long submedian ad setae, 2 long preapical d (Fig. 13F). Hind tibia with 2 submedian av; 1 submedian ad; 1 apical on av (Fig. 13F).
Abdomen. Metallic black with silver pruinosity, elongate, with developed setae, tergite 5 with long marginal setae (slightly longer than others). Inconspicuous black pruinosity forms a central longitudinal stripe dorsally. Syntergosternitewith2shortlateralsetae(Fig.1F).Sternite5rectangular,posteriormarginprofoundlyindented(Fig.3H).
Terminalia. Surstyli fused with epandrium. Surstyli slightly curved apically, with a medial projection outward directed (Fig. 4H, 5H). Bacilliform process long and simple, as long as half of the surstyli (Fig. 4H). Hypandrial arms directed outwards (Fig. 6H).
Female. (Figs 14, 15) Dichoptic (Fig. 14A), similar to male, except: frontal vitta velvety black. 4–5 frontal setae (Fig. 14A). Upper and lower orbital setae reclinate. Fronto-orbital plate shining black. Parafacial greyish pruinose (Fig. 14A). Pedicel with 1 short seta. Fore tarsomere brown. Mid femur and tibia not modified. Mid femur with 1 row of short ad, av and pv setae, 5 long prepical setae connected to a row from p to pv. Mid tibia not constricted, with 1 supramedian pd, 1 submedian ad, and 1 preapical ad. Hind femur not modified, with a row of ad setae, 2 long submedian av setae, 1 preapical pd (Figs 14B, 14C). Abdomen rounded. Terminalia: cercus longer than epiproct (Fig. 15A); hypoproct triangular and setulose, slightly longer than wide (Fig. 15B); sternite 8 reduced to 2 separated plates with long setae; sternite 7 twice wider than its length; sternite 6 trapezoid (Fig. 15B). Spermathecae 3, semicircular, one of them smaller with about half diameter of the other (Fig. 15A).
Morphological variation. The leg coloration varies from dark brown to light brown; some specimens have the sternite 5 more enlarged, as F. grisalesae (Fig. 3G). The specimens from Chiapas have the wing slightly darker on the costal region, the surstyli slightly more enlarged apically and the lateral spike on surstyli more narrow and protruded.
Etymology. Name in apposition. The specific name is based on the type-locality, Reserva Ecológica Pedregal de San Angel (REPSA).
Type-material. Holotype. Male. Mexico. Mexico City, CDMX, Edificio de Licenciatura en Ciencia Forense, REPSA [Reserva Ecológica del Pedregal de San Angel], UNAM [19.32638, -99.17442], trampa aérea 2, 25.vii-22.vii.2019, Hernández, E., Guzman, V., Morales, A. (CNIN). Paratypes. Same as holotype: 1 male (CNIN); same as holotype, except: 27.vi.2016, Hernández-Trejo, E., 1 male (CARF, CPL2658). Mexico. Mexico City, CDMX, Bosque Chapultepec, Tercera Seccion, 19°24′37′′N, 99°12′37′′W, trampa aérea 1, 23.vi-6.vii.2019, Nuple, E., 1 male (CARF, CPL2942); same label information except: 23.vi.2019, 1 male (CNIN); Cantera Oriente, UNAM [19.3180, -99.1727], 3.v.2017, Hernández-Trejo, E., 1 male (CARF, CPL2300); same label information: 1 female (CARF, CPL2301); 3 males (CARF, CPL2949-51); same label information, except: 26.vi.2017, 2 males (CNIN); 21.iv.2017, 1 male (CNIN); Xochimilco [19.258171, -99.077250], necrotrampa, ix-x.2020, A. P. Reyes Sotero, 1 male (CARF, CPL2952); same label information, except: 9.vii.2019, Nuple, E., 9 males (CNIN); 9.vii.2019, trampa aérea 2, Nuple, E., 1 male (CARF, CPL2941); 9.vii.2019, trampa aérea 3, Nuple, E., 6 males (CNIN). Mexico. Tequesquinahuac, C. Tlaloc [19.3987, -98.7085], 12.x.1983, G. Sampedro, 1 male (CNIN); Oaxaca. Guelatao [17.31805, -96.49539], 21.viii.1984, A. Ibarra, 1 male (CNIN).
Material examined. Mexico. Chiapas. Union Juarez, Chiquihuites, La Caracola, 15°05′23.28′′N, 92°05′15.3′′W, 2444m, Trampa Malaise1, 18.iii-17.iv.2018, Col. Cancino-López, R. J. & Luna-Luna,A. M., 2 males (CNIN). Mexico City. Cantera Oriente, UNAM [19.3180, -99.1727], 3.v.2017, Hernández-Trejo, E., 1 female (CARF, CPL2657); same label information: 4 females (CARF, CPL2953-56); same label information, except: 01.v.2017, 15 females (CARF, CPL2957-71); 26.vi.2017, 3 females (CARF, CPL2972-74); 21.iv.2017, 7 females (CARF, CPL2975-81); Jardín Botánico [19.31963, -99.19355], 31.viii.2016, Hernández-Trejo, E., 8 females (CARF, CPL2982-89).
Distribution. Mexico (Chiapas, State of Mexico, Mexico City, Oaxaca).
Remarks. This species has the broadest geographic distribution of the Fannia pretiosa species group from Mexico, occurring in Chiapas Highlands province, Sierra Madre del Sur province, and Transmexican Volcanic Belt province.
description: Published as part of Gomes, Lucas R. P. & Pedraza-Lara, Carlos, 2023, Fannia pretiosa-group (Diptera: Fanniidae) from Mexico: six new species from the Mexico Transition Zone and an identification key, pp. 185-204 in Zootaxa 5264 (2) on pages 199-201, DOI: 10.11646/zootaxa.5264.2.2, http://zenodo.org/record/7836396