Pseudosympycnus latitarsus, Soares & Ale-Rocha, 2022

Soares, Matheus Mickael Mota & Ale-Rocha, Rosaly, 2022, Three new species of Pseudosympycnus (Diptera, Dolichopodidae) from Peru and an updated key to the species, Revista Brasileira de Entomologia (e 20220005) 66 (1), pp. 1-10 : 7-8

publication ID	https://doi.org/ 10.1590/1806-9665-RBENT-2022-0005
publication LSID	lsid:zoobank.org:pub:46C154A4-616D-4324-AFEE-84C8F95E945A
persistent identifier	https://treatment.plazi.org/id/B24DA205-9E52-432C-8D64-75A764331938
taxon LSID	lsid:zoobank.org:act:B24DA205-9E52-432C-8D64-75A764331938
treatment provided by	Felipe
scientific name	Pseudosympycnus latitarsus
status	sp. nov.

Treatment

Pseudosympycnus latitarsus View in CoL sp. nov.

urn:lsid:zoobank.org:act:B24DA205-9E52-432C-8D64-75A764331938

( Figs. 1B View Figure 1 , 2C–D View Figure 2 , 3C–D View Figure 3 , 4C View Figure 4 , 5C–D View Figure 5 , 7 View Figure 7 )

Diagnosis (male). Metepimeron yellow ( Fig. 1B View Figure 1 ). Femora yellow,

except dorsal surface of femur I and apex of femur III brown ( Figs. 1B View Figure 1 , 4C View Figure 4 ).

Femur III with anteroventral row of slender setae decreasing in length towards apex, and ventral row of long and strong setae from base to apical 5/8 ( Fig. 4C View Figure 4 ). Tarsus I ( Fig. 3C View Figure 3 ): brown, except basal 2/3 of It 1 yellow: It 1 4 times longer than It 2 and with anterior rows of long setae at apical 1/2. It 2 with brush of compacted stout dorsal setae directed forward at base, followed by 3 stout curved setae, and with dorsal row of long setae, apex of It 2 slightly overlapping the base of It 3 and with group of dorsal long setae. It 3 slightly laterally flattened and with anterior to anterodorsal rows of long setae. Tarsus II unmodified. Tarsus III ( Fig. 3D View Figure 3 ): IIIt 3 with short dorsal projection overlapping base of IIIt 4 and with group of 4 apical curved setae. IIIt 4 with 2 posterior slender and curved setae at apical 1/2.

Description. Male ( Fig. 1B View Figure 1 ). Body length [holotype]: 2.5 mm. Wing length: 2.6 mm, width: 0.7 mm. Head ( Figs. 2C–D View Figure 2 ). Similar to P. pennipes sp. nov., except for: face ground color brown; palpus thin, ovoid, 1.5 times longer than wide, about 1/3 as long as eye height, with few pale hairs and 1 black seta at posterior margin. Thorax. Similar to P. pennipes sp. nov., except for: mesonotum and scutellum mostly brown, with greenish and bluish reflections. Legs ( Figs. 1B View Figure 1 , 3C–D View Figure 3 , 4C View Figure 4 ). Mostly yellow, but coxa II, dorsal surface of femur I, tarsus I from apex of It 1, leg II from apex of tibia and leg III from apex of femur brownish. Leg I. Podomere ratios: 28/23/12/3/6/7/8. Anterior surface of coxa I covered by short black setae, outer edge with 3 pre-apical long black setae, apicalmost stronger, apical edge with 3–4 longer black setae. Femur I with short vestiture of black setae, ventral surface mostly bare, with anteroventral row of short setae and 3–4 posteroventral slender pale setae at basal 1/3 (MSSC). Tibia I relatively thicker than II and III, with anterodorsal row of short setae from basal 2/6 to apex (MSSC), 2 posterior setae at 4/6 and 5.5/6. Tarsus I ( Fig. 3C View Figure 3 ): It 1 4 times longer than It 2 and with anterior rows of long setae at apical 1/2. It 2 with anterior brush of compacted stout dorsal setae directed forward at base, followed by 3 stout curved setae, and with dorsal row of long setae, apex of It 2 slightly overlapping the base of It 3 and with group of dorsal long setae. It 3 slightly laterally flattened and with anterior to anterodorsal rows of long setae (all MSSC). Leg II. Podomere ratios 30/44/39/10/10/5/3. Coxa II with row of short pale setae on outer margin of anterior surface, ending in 1 much longer black seta near apex.Femur II covered with vestiture of short black setae, except basal part of posterior surface and entire ventral surface mostly bare, with antero- and posteroventral rows of fine setae from base to basal 4/8 (MSSC), with 1 anterior and 1 posterior preapical setae. Tibia II with 1 anterior seta at 7/8, 5 anteroventral setae at 1/8, 2.5/8, 3.5/8, 5.5/8 and 8/8, 4 posterodorsal setae at 1/8, 2.5/8, 4.5/8 and 8/8, 1 antero- and 1 posteroventral apical setae and with ventral rows of short and slender setae. IIt 1 with 6 more conspicuous ventral setae at 1/8, 2/8, 3/8, 5/8, 6.5/8 and 8/8. Leg III. Podomere ratios: 37/43/3/15/6/6/3. Coxa III with 1 large seta, as long as coxa, at basal 1/3 and 1 smaller seta near apex. Femur III ( Fig. 4C View Figure 4 ) with anteroventral row of slender setae decreasing in length towards apex, and ventral row of long and strong setae from base to apical 5/8 (MSSC) and with 1 long anterior preapical seta. Tibia III with 4 anterior setae at 1/8, 3/8, 5.5/8 and 8/8, and with dorsal row of more conspicuous setae from 1/8 to apex and with group of short ventral fine pale hairs at apex. Tarsus III ( Fig. 3D View Figure 3 ): IIIt 1 with 1 long posteroventral seta at apex, as long as segment. IIIt 2 with posteroventral row of more erected setae. IIIt 3 with short dorsal projection overlapping the base of IIIt 4 and with group of 4 apical curved setae. IIIt 4 with 2 posterior slender and curved setae at apical 1/2. IIIt 5 unmodified (all MSSC). Wing. Similar to P. pennipes sp. nov. (see above) including the “CuAx ratio”. Abdomen ( Fig.1B View Figure 1 ). Setation and general color pattern similar to P. pennipes sp. nov., except for tergite 1 entirely yellow. Hypopygium ( Figs.5C–D View Figure 5 ). Similar to P. pennipes sp. nov. except as noted: ventral lobe of surstylus narrow, rounded at apex, with 2 long setae at ventral edge and few short setae at apex; dorsal lobe of surstylus long, triangular, wider than ventral lobe; cercus as long as ventral lobe of surstylus, narrowing at apex; epandrial lobe short, with 1 long seta at apex; phallus: basal part narrow and shorter than ejaculatory apodeme, slightly arched ventrally.

Female. Unknown.

Type material. HOLOTYPE ♂, labelled: “ Peru: Cusco, Quincemil / 13º13′03.4″S 70º43′40″W / 633m, 23–31.viii.2012 ” “Sweep, J.A.Rafael / R.R.Cavichioli & D.M.Takiya ” “ HOLOTYPE / Pseudosympycnus latitarsus / Soares & Ale-Rocha [red label]” ( MUSM) GoogleMaps . Holotype condition: left leg I, left leg II and right wing mounted between cover slides, genitalia dissected and stored in microvial with glycerin on the same pin of the specimen.

Etymology. From the Latin lato = broad and tarsus, referring to the remarkable IIIt 3 with dorsal projection overlapping the base of IIIt 4.

Remarks. Pseudosympycnus latitarsus sp. nov. is similar to Pseudosympycnus bicolor Robinson by sharing the It 2 slightly overlapping the apex of It 3, It 3 laterally flattened, IIIt 3 with dorsal projection overlapping the base of IIIt 4 and with cluster of apical setae. The new species can be differentiated by the It 1 with dorsal rows of long setae at apical 1/2 (only short setae in P. bicolor ), femur III yellow with apex brown and with ventral row of strong setae from base to apical 5/8 (femur III with apical 1/2 brown and with only 2–3 ventral setae near middle in P. bicolor ) and tibia III not compressed (tibia III slightly compressed than tibiae I and II in P. bicolor ).

Distribution. Peru (Department of Cusco) ( Fig. 7 View Figure 7 ).