Macrocera rohaceki, Mantič & Ševčík, 2017

Mantič, Michal & Ševčík, Jan, 2017, Macrocera rohaceki sp. nov. and other interesting records of Keroplatidae (Diptera) from southern and central Europe, with DNA sequence data, Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 57 (2), pp. 751-764 : 754-755

Macrocera rohaceki sp. nov.

( Figs 1–4 )

Type material. HOLOTYPE: ♂, SPAIN: MALLORCA: Caimari nr. Selva 0.6 km NW (ravine), 39°46′30″N, 2°53′52″E, 210 m, 5. V. 2013, J. Roháček leg. ( NMPC) . PARATYPES: 8 ♂♂, the same data as holotype (1 in NMPC, 2 in SMOC, 5 in JSL-UOC).

Diagnosis. Brown slender bodied species. No markings on the wing. Wing membrane covered with macrotrichia. Male terminalia with posterior margin of gonostylus forming a rounded C-shaped structure projecting dorsally.

Description. Male. Wing length 3.4 mm.

Head. Brown. Antennae brown with pedicel and scape paler to yellowish. Antenna approximately as long as the body. Flagellum incomplete in holotype. Palpi yellow. Dark setae ventrally on occiput and on face. Short bristles under the mouth.

Thorax. Brownish yellow. Three dark stripes on scutum. Median stripe broadened to the fore margin and starting more apically than the lateral stripes, ending in the middle of scutum, the lateral stripes are identical, ending on the base of scutum, leaving yellow humeral area and also both sides of the scutum are yellowish as well. Pleural sclerites shining brown, bare except for couple of short setae on the upper part of anepisternum. Mediotergite bare, brown, with yellowish side margins. Laterotergite bare, brown. Anepimeron bare, yellowish. Antepronotum yellow with several setae.

Wing ( Fig. 1 ). Transparent, without markings, narrower on basal half. Macrotrichia on the entire wing membrane. Veins brownish. Costal and radial veins covered with setae. Vein Sc 1 ending before the frm. Vein R 4 curved, ending in costa, right beyond the R 1 ending, which is not apically broadened. Costa extending 0.25 of distance from R 5 ending to M 1. Medial veins well developed, ending in wing margin. Frm very short. A 1 vein ending in wing margin. Fusion of mcu, tb and M 4 less pigmented and thus barely visible. Cu 2 straight, ending before meeting with Cu 1b. Halteres yellow, covered with short setae, central part darker.

Legs. Long, slender. Coxae and femora yellow. Rest of legs brownish. Covered with setulae. Setae on coxae as long as coxal width. Femoral setae a bit shorter than width of middle femoral region. Setae on tibia shorter than tibial width. Tibial spurs slightly longer than tibial width.

Abdomen. T1–T5 mainly brown with apical third yellowish. T6–T8 darkly brown. All with short dark bristling.

Terminalia. Brown. Cerci narrow and tapered. Gonostylus about three times as long as broad, bearing a subapical tooth and several strong setae ( Figs 2–4 ). Its posterior margin forming a rounded C-shaped structure projecting dorsally. Tergite 9 subrectangular, about twice as broad as long. Cerci narrow and slightly pointed, about 1.2 times as long as tergite 9.

Female. Unknown.

DNA sequence. The DNA sequence of COI barcode region taken from the holotype is deposited in GenBank. Its Accession number is provided in Table 3.

Etymology. The new species is named after Dr. Jindřich Roháček (Slezské zemské muzeum, Opava, Czech Republic), who collected the type material, as well as the specimens of Paleoplatyura mentioned below.

Discussion. This species belongs to the well-defined group of Mediterranean species of Macrocera characterized by unmarked wings bearing macrotrichia and relatively more complex male terminalia (cf. CHANDLER 1994). Male terminalia of the new species are somewhat similar to those of M. sinaitica Chandler, 1994 , especially in the shape of cerci and the structure of the apical part of gonostylus (subapical tooth). The gonostylus in M. rohaceki is, however, more elongated and dorsally forming a characteristic C-shaped structure ( Fig. 3 ). Also, the shape of tergite 9 in M. rohaceki is different (more rectangular).

Figures

Figs 1–4. Macrocera rohaceki sp. nov., male: 1 – wing; 2 – terminalia, ventral view; 3 – terminalia, dorsal view, tergite 9 removed; 4 – tergite 9 and cerci, external view. Scale bars = 0.1 mm.