Chrysotimus meridionalis, Naglis, Stefan & Barták, Miroslav, 2015

Naglis, Stefan & Barták, Miroslav, 2015, Dolichopodidae (Diptera) from the Iberian Peninsula, with description of three new species, Zootaxa 3964 (1), pp. 125-137 : 126-127

Chrysotimus meridionalis sp. nov.

( Fig. 1 A)

Type material. HOLOTYPE ♂: PORTUGAL, Valhelhas, 500 m, SW+PT, 16–17.VII.2009, M. Barták ( CULSP). PARATYPES: SPAIN, 1 ♂, Sierra Nevada, Mecina Bombarón, 1100 m, SW, 18.VIII.2006; 1 ♂, Sierra Nevada, Trevélez, 1440 m, SW, 15.VIII.2006; all M. Barták ( CULSP).

Diagnosis. Antenna black, first flagellomere higher than long; arista dorsoapical; face metallic green, with white pruinosity; lower postocular setae white; thorax and abdomen bright metallic green, shining; first abdominal segment yellow; setae on thorax and abdomen yellow; legs including coxae entirely yellow; veins R4+5 and M parallel; CuA about 4 times as long as crossvein dm-cu; tergite 8 and epandrium yellow.

Description. Male. Body length (holotype): 1.9 mm, wing length 2.1 mm. Head: frons and face metallic green, shiny, with some white pruinosity, narrowest distance between eyes about 3 times the distance between ocellar setae; palpus pale yellow; proboscis dark brown; antennal segments black; first flagellomere 1.5 times as high as long, with long hairs; arista dorsoapical, pubescent; lower postocular setae white. Thorax: mesonotum bright metallic green, shiny, with white grey pruinosity; thoracic setae yellow; 5 pairs of strong dc; ac absent; scutellum with pair of strong marginal setae and 2 small lateral setae; 1 strong yellow ppls; pleura metallic green, shiny, with white pruinosity. Legs: entirely yellow including coxae, except tarsomere 5 dark brown, setae and hairs yellow. Fore leg: coxa with some anterior setae; femur, tibia and tarsomeres lacking major setae; tarsomere 5 slightly flattened dorsoventrally; relative podomere ratios: 47:52:28:12:10:5:6. Mid leg: coxa with some anterior and a strong anterolateral seta; femur with a strong anterior preapical seta; tibia with strong ad setae at 1/4 and 2/3, with small pd seta at 2/3, and with 3–4 apical setae; tarsomere 5 slightly flattened dorsoventrally; relative podomere ratios: 52:66:36:15:10:6:6. Hind leg: coxa with strong lateral seta; femur with strong anterior preapical seta; tibia with small ad seta at 1/3, with some small dorsal setae, and some apical setae; tarsomere 5 slightly flattened dorsoventrally; relative podomere ratios: 53:79:28:18:13:7:6. Wing: hyaline, veins yellow; basal section of CuA longer than distal section; R3+4 and M parallel and curved posteriad; CuAx ratio: 0.27; RMx ratio: 2.5; lower calypter whitish, with white setae; halter pale yellow. Abdomen: light metallic green, shiny, tergites 1 and 8 yellow; hairs and setae yellow. Hypopygium ( Fig. 1 A): epandrium yellow; cercus brown; epandrial lobe basally yellow, apically dark brown, surstylus dark brown. Epandrial lobe long, with oval apex, with 1 strong midventral and 2 smaller apical setae; hypandrium short, truncate; surstylus with strong, subapical seta. Female: unknown.

Distribution. Portugal, Spain, Turkey (Naglis, unpubl.).

Etymology. The name refers to the southern distribution of the species.

Remarks. In the Palaearctic key ( Negrobov 1978), C. meridionalis sp. nov. runs to C. molliculus (Fallén, 1823) . Males of both species can be separated by the characters given below.

1 First abdominal segment entirely yellow; tergite 8 and hypopygium yellow; epandrial lobe ventral view without incision ( Fig. 1 A)............................................................................. C. meridionalis sp. nov.

- First abdominal segment metallic green, sometimes with narrow yellow band basally; tergite 8 and hypopygium dark brown; epandrial lobe ventral view with deep incision ( Fig. 1 B)..................................... C. molliculus (Fallén)

Figures

FIGURE 1. Chrysotimus species, hypopygium ventral: A, Chrysotimus meridionalis sp. nov.; B, Chrysotimus molliculus (Fallén). Aed = aedeagus; Epl = epandrial lobe; Hyp = hypandrium; Sur = surstylus (scale bar = 0.1 mm).