Neurigona papaveroi, Silva & Capellari & Oliveira, 2022

Silva, Paulo Cesar Da, Capellari, Renato S. & Oliveira, Sarah S., 2022, Three new species of the Neurigona orbicularis species group from Brazil (Diptera: Dolichopodidae), Zootaxa 5093 (5), pp. 547-558 : 553-554

Neurigona papaveroi sp. nov.

( Figs 20–25 )

Description. Male. Body length: 3.8 mm. Wing length: 3.1 mm. Very similar to N. lopesi sp. nov. in both general habitus and chaetotaxy, except as noted below.

Head. Eyes touching at middle of face, leaving small triangle above and below, face dark yellow, only slightly pruinose below; postoculars in single row of pale setae similar in length, with 2 uppermost setae black, dorsalmost only slightly longer than second. Antennal stylus about 7 times as long as postpedicel.

Thorax. Color pattern and chaetotaxy as in N. lopesi sp. nov. Legs. Entirely yellow, setae black except as noted. Femora with short vestiture, tarsi without remarkable setae. Leg I. Podomere ratios: 7.7, 8.7, 8, 4, 2.7, 1.7, 1. Anterior surface of coxa I covered by sparse short, black setae, distal edge with 5 strong setae, decreasing in size medially. Tibia I without conspicuously longer setae. Leg II. Podomere ratios: 8.7, 12, 10.3, 4.7, 2.7, 1.3, 1. Anterior surface of coxa II covered by short vestiture, lateral surface bare. Tibia II with 1 small dorsal seta at basal 1/10, 1 anterodorsal seta at basal 1/5 and anterodorsal-posterodorsal setal pair at basal 3/5 and 2 apical setae. Leg III. Podomere ratios: 7.5, 11.75, 4, 4.5, 2.25, 1.5, 1. Coxa III with strong lateral seta in basal half and 1 tiny hair above. Tibia III with 2 small anterodorsal setae near basal 1/5 and 3/5, with 1 dorsal seta near middle only slightly longer than dorsal ones, and 3 apical setae. Wing. RMx ratio = 0.83, CuAx ratio = 0.40.

Abdomen. Tergites mostly brown (except tergite 1 entirely yellow), with yellow dorsal stripe broadening from tergites 4 to 2 (tergite 2 only with lateral brown patch). Sternites brown, except sternites 1 and 2 yellowish; sternite 5 with strong triangular ventral projection. Setae on tergites black, those on hind margin of segment 1–5 longer. Tergite 6 bare. Tergite and sternite 7 reduced. Hypopygium ( Figs 20–25 ). Genital capsule ( Fig. 20 ) and appendices brown. Ventral lobe of surstylus ( Fig. 21 ) rounded, without elongate projection, with two setae, apical one slightly flattened. Dorsal lobe of surstylus ( Fig. 22 ) with projection curved inwards, apex with grooves. Apicolateral epandrial lobe ( Fig. 23 ) relatively simple, with four setae and one distinct projection. Basolateral epandrial lobe absent. Hypandrium ( Fig. 24 ) with distal part simple, without projections, tapering at apex. Postgonite ( Fig. 24 ) slightly enlarged, with hairs at apex. Cercus ( Fig. 25 ) with dark, sclerotized lateral part; medial part delicate, with projection at base, with long, curved and branched seta at middle, with short digitiform apical projection, bifurcate at apex, one modified seta anteriad.

Female. Unknown.

Type material. HOLOTYPE ♂, labelled: “ BRASIL, MT [Mato Grosso State], Chapada dos | Guimarães, Cerrado , Trilha da | Pedra ( Mirante ), 788m, 15° 24′| 21.8′′S 55° 50′ 7.5′′W. | 22.xii.2011 - 17.i.2012, Malaise | 22. Lamas, Nihei & eq. col.”, “ HOLOTYPE | Neurigona papaveroi | Silva, Capellari & Oliveira [red label]” ( MZSP) . Holotype in good condition, genitalia dissected and stored in microvial with glycerin, pinned along with the specimen.

Etymology. Named after Nelson Papavero, who helped mentor generations of Brazilian dipterists.

Remarks. The new species is similar to N. tingua sp. nov. and N. yacambo (not examined by us), sharing the eyes touching in the middle of the face or nearly so. Neurigona yacambo can be differentiated by a single anterodorsal seta at basal 1/5 on tibia III, while N. papaveroi sp. nov. and N. tingua sp. nov. have an additional anterodorsal seta at basal 3/5. Neurigona papaveroi sp. nov. is distinctive by the relatively short and plain apicolateral epandrial lobe ( Fig. 23 ) and the absence of the basolateral epandrial lobe.

Distribution. Brazil (State of Mato Grosso, Cerrado biome).

Figures

FIGURES 20–25. Hypopygium of Neurigona papaveroi sp. nov. and its component appendages in left lateral view. 20. Hypopygium. 21. Ventral lobe of surstylus. 22. Dorsal lobe of surstylus. 23. Apicolateral epandrial lobe. 24. Hypandrium (hyp) and postgonite (pgn). 25. Cercus. Scale bar = 0.1 mm.