Dolichocephala fumosa, Wagner & Andrade & Gonçalves, 2025

Wagner, Rüdiger, Andrade, Rui & Gonçalves, Ana, 2025, Report on Brachystomatidae and Empididae (Hemerodromiinae, Clinocerinae) from continental Portugal and neighbouring countries, Zootaxa 5722 (3), pp. 345-368 : 355

Dolichocephala fumosa sp. nov.

( Figs 13, 18 , 21, 22, 23 )

Diagnosis. A green to brown glossy species, coxae and femora yellow, tibia and tarsi pale brown; abdomen brown; hypandrium elongate, clasping cercus sickle-shaped with a small dark apical seta on inner surface.

Description. Male. Body glossy dark-green to brown, body length approximately 1.8 mm. Head elongate, attached to thorax high on occiput. Antenna as in genus description; pair of remarkably long ocellar setae. Thorax brownish, ventrally lighter brown; mesonotum with 5 pairs of dorsocentral setae (dc); 2–3 pairs of acrostichal setae (ac) in front of first pair of dc. Coxae, trochanters and femora yellow; tibiae and tarsi pale brown. Wing brownish translucent, veins R 4+5 and R 5 stronger than all other veins; auxiliary crossvein connecting R 2+3 and R 4 absent. Wing length 2.0 mm, width 0.65 mm. Abdomen with brown tergites and sternites, sternites 4–8 darker brown. Tergite 1 thin; tergite 2 large with lateral prolongations reaching edges of sternite 1. Terminalia with elongate hypandrium; phallus almost straight with well-developed distiphallus. Outline of epandrium with horizontal base, vertical lateral edges and dorsal semicircular edge; surstylus small (not identified). Clasping cercus sickle-shaped, with broad, strong base and elongate and evenly bent distal part; near base several stronger setae; short strong seta on inner surface at tip.

Material examined. HOLOTYPE: ♂: Portugal: 16.VII.2023, Viana do Castelo, Melgaço, Castro Laboreiro e Lamas de Mouro ( Parque Nacional da Peneda-Gerês ), 41°59'39.4"N, 8°10'03.7"W; leg. RA (slide mounted) . PARATYPES: Portugal: 1 ♀, same data as holotype . France: 1♂ [slide mounted; slide with 3 white labels]: 1. Dolichocephala fumosa V . ♂, BBB TÉTE, France, GEN. Profil ; 2.GBIFCH 00602619; 3. Escalette, 410 m, 21.V.1973 , HOLOTYPE, A. THOMAS [labels 1 and 3 pencil handwriting Vaillant, 2 printed]; [red label ‘ Dolichocephala fumosa paratype Wagner 2024 ’ on backside of slide]. Holotype and paratypes deposited in collection RW and MZLS .

Etymology. The new species is named in reference to the darkly colored wings.

Remarks. Dolichocephala . fumosa is a close relative of D. cavatica (Becker, 1889) , with both species lacking an auxiliary crossvein between R 2+3 and R 4. Differences between species include wings plain translucent in D. cavatica , brownish in D. fumosa ; the hypandrium of D. cavatica is short triangular, but is elongate rectangular in D. fumosa .

Ecological notes. In Portugal, this species was discovered in a rocky stream bed (Ribeira de Dorna) ( Fig. 2 ) by sweeping the wet surface of exposed rocks. The site is situated at an altitude of approximately 800 meters, within a forest primarily dominated by oaks. Birches and willows are also present along the stream banks.

Figures

FIGURES 11–18. Wings and male genitalia, lateral view. Pseudheleodromia haenii (11, 15), Hemerodromia auremensis sp. nov. (12, 16), Dolichocephala fumosa sp. nov. (13, 18), Dolichocephala grandistylus sp. nov. (14, 17). Scale bars: 0.1 mm (15–18); 0.2 mm (12); 0.5 mm (11, 13, 14).

FIGURES 19–25. Male genitalia, lateral view. 19. Hemerodromia auremensis sp. nov.; 20. Ibidem, inner view; 21. Dolichocephala fumosa sp. nov., hypandrium and phallus; 22. Ibidem, epandrium and clasping cercus; 23, Ibidem, inner view; 24, Dolichocephala grandistylus sp. nov.; 25. Ibidem, epandrium, surstylus and clasping cercus, inner view. Scale bars: 0.1 mm.

FIGURES 1–4. Habitats of aquatic empidids in Portugal. 1. Nabão River near village of Agroal, type locality of Hemerodromia auremensis sp.nov.;2.RibeiradeDorna,smallrockystreamnot farfrom townofCastroLaboreiro,typelocalityofDolichocephala fumosa sp. nov.; 3. Ferreira River near village of Couce (Valongo), type locality of Dolichocephala grandistylus sp. nov.; 4. Ribeira de Cortes, mountain stream that runs near village of Cortes do Meio, habitat of several species of aquatic empidids, such as Chelifera monostigma, Ch. subangusta, Hemerodromia baetica, D. grandistylus sp. nov. and Wiedemannia czernyi.