Fannia gilvitarsis Chillcott, 1961

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, Zootaxa 5264 (2), pp. 185-204 : 194-196

publication ID	https://doi.org/ 10.11646/zootaxa.5264.2.2
publication LSID	lsid:zoobank.org:pub:97A03469-519D-49D7-8D0E-2F6648CCB922
DOI	https://doi.org/10.5281/zenodo.7836381
persistent identifier	https://treatment.plazi.org/id/0396A100-C217-EE78-DDF7-F9C642A016B8
treatment provided by	Plazi
scientific name	Fannia gilvitarsis Chillcott, 1961
status

Treatment

Fannia gilvitarsis Chillcott, 1961 View in CoL

( Figs 1H View FIGURE 1 , 3F View FIGURE 3 , 4F View FIGURE 4 , 5F View FIGURE 5 , 6F View FIGURE 6 , 11 View FIGURE 11 , 16 View FIGURE 16 )

Diagnosis. Fore tarsi white-yellowish, except for tarsomere 5, with apical half brown and basal half white ( Fig. 11D View FIGURE 11 ). Mid basitarsus swollen ventrally at middle ( Fig. 1H View FIGURE 1 ). 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 View FIGURE 11 ). Wing slightly brownish ( Fig. 11B View FIGURE 11 ).

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 View FIGURE 11 ). 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 View FIGURE 11 ). 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 View FIGURE 11 ). 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 View FIGURE 11 ).

Wing. Slightly brownish ( Fig. 11B, 11C View FIGURE 11 ). 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 View FIGURE 11 ). 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 View FIGURE 11 ). 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 View FIGURE 11 ). Mid basitarsus slightly enlarged ventrally ( Fig. 1H View FIGURE 1 ). 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 View FIGURE 11 ). Hind tibia with 2 submedian av setae; 1 apical av ( Fig. 11F View FIGURE 11 ).

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 View FIGURE 3 ).

Terminalia. Surstyli fused with epandrium. Surstyli slightly curved apically ( Figs 4F View FIGURE 4 , 5F View FIGURE 5 ). Bacilliform process long and simple, as long as half of surstyli ( Fig. 4F View FIGURE 4 ). Hypandrial arms directed outwards ( Fig. 6F View FIGURE 6 ).

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) GoogleMaps ; 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) GoogleMaps . Tlaxcala. Nanacamilpa, Piedra Canteada , 19°27′23′′N, 98°36′01′′W, 13.vii.2019, Nuple, E., 1 male ( CARF, CPL2926 ) GoogleMaps .

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.