Gaurax siostrzoneki, Kubik, Stepan & Bartak, Miroslav, 2018

Kubik, Stepan & Bartak, Miroslav, 2018, A new species of Gaurax from the Czech Republic (Diptera, Chloropidae), ZooKeys 803, pp. 131-140 : 133-134

Gaurax siostrzoneki sp. n. Figures 3, 4, 5, 6

Holotype male.

Czech Republic, Bohemia, Vráž nr. Písek, alder forest, 430 m, PyrT [= pyramidal trap], 49°24'8"N / 14°7'8"E, 25. vi– 19.vii.2010, Barták leg. Holotype is in good condition, abdomen on plastic tag together with the specimen. Paratypes. 3 males, same data as the holotype, 4 males and 4 females: Vráž nr. Písek, 400 m, Sawdust trap, 49°24'12"N / 14°7'3"E, 12. vi– 30.ix.2014, Barták leg.

Diagnosis.

Species with head 1.25 × as deep as long, first flagellomere 1.3 × as deep as long, body yellow with three black partly fused stripes, central stripe reaching scutellum and scutellum often dark. Gaurax siostrzoneki sp. n. is similar to G. flavoscutellatus . The main characters distinguishing these two species are as follows: Gaurax siostrzoneki has surstylus with two long curved extensions, one long, strong seta growing from the lower projection, and cercus short and enlarged at apical part. In G. flavoscutellatus surstylus is without spurs and cercus is short and narrowed.

Description.

Male (Figs 3, 4). Body length 1.3-1.5 mm. Ground colour yellow. Head 1.25 × as deep as long (lateral view), yellow with black occiput. Ocellar triangle occupying two-thirds of frons, yellow, shiny, and black on ocellar tubercle only, with one row of dark interfrontal setulae along sides. All setae and setulae on head black. First flagellomere 1.3 × as deep as long, yellow, often darkened on outer margin (variable). Arista black. Eyes with ommatrichia. Depth of gena in front equal to the length of first flagellomere, gena with one row of dark setulae. Palpus yellow.

Thorax. Scutum shiny yellow with three black partly fused stripes, central stripe reaching scutellum, sometimes scutum completely dark. Scutellum yellow or dark, apical scutellar setae longer than lateral setae. Anepisternum, katepisternum, katepimeron, and meron shiny yellow with 1-4 small dark spots. Notopleural setae 1+1. Setae of thorax black. Wings not coloured. Haltere yellow. Legs completely yellow.

Abdomen: black dorsally and yellow ventrally. Male genitalia (Figs 5, 6): epandrium yellow with dark, wide, medial stripe, surstylus with two long curved extensions, one long, strong seta growing from the lower projection, cercus short and enlarged at apical part.

Etymology.

Named in honour of Archbishop of Břevnov Monastery Petr Prokop Siostrzonek, a supporter of natural science and our friend.