Fannia gilvitarsis Chillcott 1961
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 gilvitarsis

description: Fannia gilvitarsis Chillcott, 1961
(Figs 1H, 3F, 4F, 5F, 6F, 11, 16)
Diagnosis. Fore tarsi white-yellowish, except for tarsomere 5, with apical half brown and basal half white (Fig. 11D). Mid basitarsus swollen ventrally at middle (Fig. 1H). Hind coxa bare posteriorly. Hind femur slightly curved with pre-apical swelling on v surface, with a pv tuft with five long setae (twice longer than width of femur) on the swelling (Fig. 11F). Wing slightly brownish (Fig. 11B).
Redescription. Male. Body length: 6.8 mm. Wing length: 7.1 mm.
Head. Eye short and sparsely setulose. Ocellar triangle black; ocellar setae proclinate and developed (as long as frontal setae). Frontal vitta velvety brownish-red to black with silver pruinosity, at the narrowest point four times wider than width of anterior ocellus (Fig. 11A). Frontal setae 15. Fronto-orbital plate black-reddish with silver pruinosity. Parafacial bare, brownish-red with silver pruinosity. Frontogenal suture and gena silver pruinose. Gena brownish-red to black (Fig. 11A). Pedicel with dorsal seta developed, with about a third length of arista. Postpedicel black, golden pilose.
Thorax. Scutum without vittae, with inconspicuous silver pruinose on postpronotal and notopleural regions (Fig. 11B). Acrostichal setulae triserial presuturally and triserial to quadriserial postsuturally. Dorsocentrals 2+3, long, the posterior-most postsutural pair slightly longer than the others. Prealar 2, short (about a third of posterior notopleural length), the posterior one thinner, both similar in length. Katepisternum with about 10 long and thick setae ventrally (Fig. 11C).
Wing. Slightly brownish (Fig. 11B, 11C). Calypters white. Haltere brown with stem and base yellow.
Legs. Black, pulvilli brownish and tarsi brown, except for the fore tarsomeres 1–5 which are white-yellowish. Fore tarsomeres 1 and 2 slightly enlarged laterally. Fore tarsomere 5 with a pair of long setulae dorsally (as long as tarsomere 5 width) (Fig. 11D). Mid femur with 1 row of ad setae; with 1 row of decreasing av from base to apex; 2 rows of long pv, thicker apically, a tuft of short v setae on preapical third (Fig. 11E). Mid tibia with 1 submedian ad, 1 median pd, 1 strong and long preapical d, 1 apical seta on a, pd, p, pv, and v (v longer, similar to d preapical seta) (Fig. 11E). Mid basitarsus slightly enlarged ventrally (Fig. 1H). Hind coxa bare on posterior margin. Hind femur 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 to d setae, pd to pv rows of setae from the femur base to the pre-apical swelling, 1 long preapical av setae, 1 short preapical ad and pd (Fig. 11F). Hind tibia with 2 submedian av setae; 1 apical av (Fig. 11F).
Abdomen. Metallic black-bluish with silver pruinosity, elongate, with developed setae, tergite 5 with long marginal setae (about twice longer than others). Black pruinosity forming a central narrow longitudinal stripe dorsally. Syntergosternite with 3 long lateral setae, not longer than sternite 5. Sternite 5 quadrangular, posterior margin profoundly indented (Fig. 3F).
Terminalia. Surstyli fused with epandrium. Surstyli slightly curved apically (Figs 4F, 5F). Bacilliform process long and simple, as long as half of surstyli (Fig. 4F). Hypandrial arms directed outwards (Fig. 6F).
Female. Unknown.
Material examined. Mexico. Hidalgo. Parque Ecológico El Chico, Mineral de Chico, 20°10′58′′N, 98°43′04′′W, trampa aérea 3, 9.vi-16.vii.2019, Nuple, E., 1 male (CNIN); same label information except:trampa aérea5, 16.vii.2019, 1 male (CARF, CPL2927); trampa aérea 6, 16.vii.2019, 1 male (CARF, CPL2944). Mexico. Tequesquinahuac, C. Tlaloc [19.3987, -98.7085], 15.iv.1982, G. Sampedro, 2 males (CNIN). Tlaxcala. Nanacamilpa, Piedra Canteada, 19°27′23′′N, 98°36′01′′W, 13.vii.2019, Nuple, E., 1 male (CARF, CPL2926).
Distribution. Mexico (Hidalgo, State of Mexico, Tlaxcala).
Remarks. Fannia gilvitarsis is a unique species with fore tarsomere 5 yellow basally and brown apically. This species was only known by the original description (Chillcott, 1961) with a record from State of Mexico. We present new records from Hidalgo and Tlaxcala states.
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 194-196, DOI: 10.11646/zootaxa.5264.2.2, http://zenodo.org/record/7836396