Norellisoma jelineki, Šifner, 2006

Šifner, František, 2006, Norellisoma jelineki sp. nov. - a new species from the Czech Republic (Diptera: Scathophagidae), Acta Entomologica Musei Nationalis Pragae 46, pp. 193-196 : 93-94

Norellisoma jelineki sp. nov.

( Figs. 1-5 )

Type material. HOLOTYPE: J, CZECH REPUBLIC: BOHEMIA occ., Sokolov coal-mining area, Chodov – Mírová (5742), Chodovský potok brook, 50°14′08″N 12°47′49″E, meandering, polluted brook, with alders on the banks, Malaise trap, 3.viii.2005, P. Chvojka, J. Ježek & J. Macek leg. ALLOTYPE: ♀, CZECH REPUBLIC: MORAVIA mer., Bílé Karpaty Protected Landscape Area, Strání (7072), Svinárský potok brook, 48°52′00″N 17°40′37″E, beech wood, Malaise trap, 27.viii.2005, P. Chvojka, J. Ježek & J. Macek leg. The types are deposited in the collection of the National Museum in Praha .

Diagnosis. Body length 8-10 mm, yellow to brown in primary colour, scutum distinctly darkened dorsally, scutellum yellow, proepimeron distinctly darkened with yellowish central part.

Head. Two orbital setae, 2-3 frontal setae, frontal vitta in upper part brown, in lower part yellow, parafacials yellow, face and genae yellow-white, antennae completely yellow, arista distinctly black and sparsely pubescent; only one long vibrissal seta present; palpi yellow.

Thorax. Acrostichal setae very sparse and almost invisible, five dorsocentral setae (2 + 3), one humeral seta, two intraalar setae and one short supraalar seta, one postalar seta, one pair of discal scutellar setae, one pair of very short, hair-like, apical discal setae, two notopleural setae (posterior one distinctly shorter), one proepimeral seta, one very short anepisternal seta, hair-like prostigmal setae, and one katepisternal seta; all femora, tibiae and tarsomeres yellow; wings hyaline, veins yellow to brown and only weakly distinct.

Abdomen. Male – 4 th sternite more or less square-shaped, proximally slightly concave and with sparse bristles; lobes of 5 th sternite short, arched laterally, hairy, covered with dense thorns medially and apically ( Fig. 1 ); praegonite narrowed with three bristles: two long and fine apical ones and one lateral projecting at a right angle to the apical ones ( Fig. 2 ). Female – 6 th sternite more or less oval with distinct and slender proximal projection; 7 th sternite divid- ed into two distinct sclerites caudally ( Fig. 3-4 ); 8 th sternite with six thorns, four marginal and two submarginal ( Fig. 5 ).

Differential diagnosis. Norellisoma jelineki sp. nov. differs from the two nearest species, N. spinimanum (Fallén, 1819) and N. alpestre (Schiner, 1864) , by the following characters:

Norellisoma jelineki sp. nov. – wing veins only weakly distinct, praegonite of male with two apical bristles and one external lateral bristle, 4 th abdominal sternite with a distinct projection, lobes of 5 th abdominal sternite short and arched laterally, 8 thabdominal sternite of female with six thorns.

Norellisoma spinimanum – wing veins darkened, praegonite of male with three apical bristles, 4 th abdominal sternite rectangular, lobes of 5 th abdominal sternite long, narrow and slightly arched inwards, 8 th abdominal sternite of female with seven to nine thorns (cf. ŠIFNER 2003a, p. 29).

Norellisoma alpestre – wing veins dark, praegonite of male with three apical bristles, 4 th abdominal sternite rectangular, lobes of 5 th abdominal sternite narrow and pointed apically, 8 th abdominal sternite with five thorns (cf. ŠIFNER 2003a, p. 24).

Etymology. Dedicated to the Czech coleopterologist Josef Jelínek (Department of Entomology, National Museum, Praha).

Distribution. Czech Republic.

Figures

Figs. 1-5. Norellisoma jelineki sp. nov. 1-2 – male, holotype. 1 – 4th and 5th abdominal sternites; 2 – praegonite. 3-5 – female, allotype. 3 – 6th abdominal sternite; 4 – 7th abdominal sternite; 5 – 8th abdominal sternite with six thorns. Scale bars = 0.5 mm (Figs. 1, 3, 4); 0.1 mm (Fig. 2).