Neuratelia salmelai, Kurina, Olavi, Ounap, Erki & Poldmaa, Kadri, 2015

Kurina, Olavi, Ounap, Erki & Poldmaa, Kadri, 2015, Two new Neuratelia Rondani (Diptera, Mycetophilidae) species from Western Palaearctic: a case of limited congruence between morphology and DNA sequence data, ZooKeys 496, pp. 105-129 : 115

Taxon classification Animalia Diptera Mycetophilidae

Neuratelia salmelai sp. n. Figs 5, 18, 20, 22, 24, 26, 28

Type material.

Holotype. 1♂, ESTONIA. Palupõhja, Kaha (ME 57), Malaise trap, 58°25'54,68"N, 026°14'28,90"E, 29.vi.-8.vii.2009, V. Soon leg. (IZBE0200253, slide mounted in Euparal with terminalia in glycerine). Paratypes. 1♂, FINLAND. Lkor: Sodankylä, Kaita-aapa, Malaise trap, 67°50'45,5"N, 026°33'17,6"E, 5.vi.-3.vii.2012, J. Salmela leg. (IZBE0200254, in alcohol with terminalia in glycerine); 1♂, FINLAND. Lkoc: Kittilä, Kielisenpalo, Malaise trap, 68°01'16,6"N, 025°03'46,9"E, 26. vi– 24.vii.2007, J. Salmela leg. (MYCE-NV-2013-0093 in ZMUT, in alcohol with terminalia in glycerine); 1♂, FINLAND. Lkoc: Kittilä, Vuotsonperän-jänkä, Malaise trap, 67°37'15,9"N, 025°26'43,6"E, 25.vi.-24.vii.2009, J. Salmela leg. (MYCE-NV-2013-0131 in ZMUT, in alcohol with terminalia in glycerine); 1♂, FINLAND, Lkor: Sodankylä, Pomokaira 67°52'19,2"N, 026°12'46,8"E, 11.6.-10.7.2013, J. Salmela leg. Malaise trap Salix swamp with seepages (DIPT-JS-2014-0199 in JSPC, in alcohol).

Description.

Male (Figs 5, 18). Body length 5.8-6.5, 6.2 [5.8] mm (n=4).

Head (Fig. 18) brown to dark brown, with numerous setae. Three ocelli in a shallow and wide triangular arrangement, with laterals separated from eye margins by a distance about twice of their own diameter. Face conical, about 0.9 times as wide as maximum height; clypeus rectangular, about 0.6 times as wide as high; both brown, setose, with setae on clypeus stronger than those on face. Mouthparts light brown. Palpus five segmented, yellowish brown with second segment and apex of fifth segment darker. Ratios of three apical palpal segments 1.0: 1.37-1.65, 1.52 [1.56]: 1.62-1.82, 1.72 [1.71]. Scape and pedicel brown, pedicel somewhat lighter; flagellomeres light brown, with short pale setae. First flagellomere yellowish at basal half. Flagellum evenly tapering; first flagellomere clavate, 2.5-3.3 times as long as broad apically, 2-13 flagellomeres cylindrical, fourth flagellomere about 2.3-2.6 times as long as broad, apical flagellomere slightly conical, 5.2-6 times as long as broad at base.

Thorax (Fig. 18). All parts brown to dark brown, all setae yellow to light brownish. Mesonotum with evenly arranged numerous setae. Scutellum with about 10 setae along the margin, not arranged to distinct pairs. Antepronotum with 10-13 and proepisternum with 5-8 setae of unequal size, laterotergite with 17-26 setae and mediotergite with ca 12-20 setae medially on lower part. Other pleural parts bare. Halteres yellow, setose.

Legs. All coxae yellow with basal fourths brown. In case of two paratypes, cx3 entirely light brownish with darker basal half. All trochanters brown. All femora and tibiae yellow, tarsi seem darker because of dense setae. Foretibia with 2-3 ad, 1-3 d and 2-3 pd. Midtibia with 6-10 a, 0-4 d, 4-5 av and 2-3 pd. Hind tibia with 8-10 a, 1-2 ad (1 at apex), 7-8 d, 5-7 p and with a posterior apical comb of setae. Ratio of femur to tibia for fore-, mid- and hind legs: 0.86-0.91, 0.88 [0.91]; 0.72-0.87, 0.80 [0.87]; 0.72-0.77, 0.75 [0.72]. Ratio of tibia to basitarsus for fore-, mid- and hind legs: 0.81-1.00, 0.9 [0.9]; 1.22-1.33, 1.27 [1.22]; [1.66].

Wing hyaline, length 4.1-5.0, 4.52 [4.49] mm (n=4). All veins brown, costal and radial veins somewhat darker. Both surfaces of all veins setose. Wing membrane with micro- and macrotrichia on both surfaces. Costa reaches very little from R5 to M1. Sc reaches costa at about quarter between Rs and tip of R1. R5 sinuate. Rs about as long as crossvein r-m. M1 basally obsolete: observable vein begins distally from middle of R1. Cubital fork begins proximally from apex of Sc.

Abdomen with tergites brown to dark brown and with sternites yellow to brownish yellow. Terminalia (Figs 20, 22, 24, 26, 28) dark brown. Tergite 9 apically rounded, with deep and narrow basal incision about half of height of tergite. Basolateral portions of tergite 9 tapering. Setae on tergite 9 similar to these on the gonocoxite. Cerci fused, protruding over tergite 9, with strong apical setae deviating from other setosity. The gonocoxite with elongated dorsoapical and ventroapical lobes. Dorsoapical lobe of the gonocoxite dorsobasally right-angled and apically tapering, both well exposed in lateral view and with subapical medially directed hump. Dorsomedial margin of the gonocoxite slightly undulating. Ventroapical lobe of the gonocoxa apically rounded and subapically somewhat deformed. The gonocoxite ventrobasally with wide shelving incision and ventroapically well sclerotised, with a medial cleft. The gonostylus with two branches. The dorsal branch kidney-shaped, slightly widening towards medial line. The ventral branch elongated, apically evenly rounded, with a clear medial widening which bears strong setae well deviating from other setosity of the branch. The medial widening of the ventral branch of gonostylus connected with apical part of the ventroapical lobe of gonocoxite. Parameres long, sinuous, protruding over ventroapical margin of gonocoxite.

Female. Unknown.

Biology.

Unknown.

Etymology.

The species is named in honour of Dr. Jukka Salmela, who kindly provided us the material collected from Finland.

Specific discussion.

Following the key by Zaitzev (1994) the new species runs to Neuratelia sintenisi Lackschewitz, 1937, as its foretibia is usually shorter than fore-basitarsus. However, this character seems to be variable, as these are of equal length in one paratype, guiding to Neuratelia nemoralis , a species with so far reported Holarctic distribution ( Laffoon 1965, Zaitzev 1994, but see specific discussion under the latter). In sharing the general outline of male terminalia, Neuratelia salmelai resembles in addition to Neuratelia nemoralis also to Neuratelia kamijoi Sasakawa, 2004 from Japan. All three species have gonocoxite with protruding lobes dorsoapically and ventroapically, and two-branched gonostylus. Neuratelia kamijoi has the dorsoapical lobe of gonocoxite with clear subapical tooth (cf. Sasakawa 2004: fig. 5) while in the other two species it is more simple. Neuratelia salmelai differs markedly from Neuratelia nemoralis as follows: 1) dorsoapical lobe of gonocoxite apically tapering (apically evenly rounded in Neuratelia nemoralis ), 2) dorsal branch of gonostylus kidney-shaped and slightly widening towards medial line (elongated, curved and sharply widening towards medial line in Neuratelia nemoralis ), and 3) ventral branch of gonostylus apically evenly rounded with medial widening that bears strong setae deviating well from other setosity of the lobe (ventral branch of gonostylus apically pointed with subapical widening that bears normal setae not deviating from other setosity of the branch in Neuratelia nemoralis ).