Paralimna (Paralimna) bocki, Polevoi & Maximova & Subbotina, 2020

Krivosheina, M. G. & OZerov, A. L., 2020, A new species of the shore-fly genus Paralimna Loew, 1862 (Diptera: Ephydridae) from Australia, Russian Entomological Journal 29 (2), pp. 222-226 : 224-225

Paralimna (Paralimna) bocki , sp.n.

Figs 1–2 .

MATERIAL. Holotype ♂, Australia: Queensland, Proserpine env. (20.4ºS 148.6ºE), 29–30.I.2013, N. Vikhrev ( ZMUM) . Paratypes: 2 ♀♀, the same label and date ( ZMUM) . Holotype male specimen is dissected, male terminalia are preparated and placed inside plastic tube filled with glycerin.

DIAGNOSIS. Due to general brown coloration, many strong facial setae and more developed setation of the body the new species is differentiated well externally from the other Australian species of the subgenus Paralimna . The new species differs from the other four known species by the shape of presurstyli in posterior view: presurtyli of P. (P.) bocki long and broader than those of P. (P.) millepuncta ( Figs 3–4 ) and significantly longer and narrower than in P. (P.) spatiosa [ Bock, 1988, Fig. 6].

DESCRIPTION. Body medium-sized, length 6.2 mm in male, 6.5–6.9 mm in female, wing 5.7 mm. General coloration brown, pollen, lateral surfaces brownish-grey, pollen with blackish spots at bases of setae.

Head. Frons dark, brown-pollen, orbits and ocellar triangle brown; face brown; carina brown; clypeus brown; parafacial and gena greyish-brown; palpus black; antennae black except scape grey dorsally; arista brown with 9 long dorsal rays; eye oval, higher than wide; eye-to gena height ratio 3:1; face with vertical row of 8 setae, the length of which decreasing downwardly, the four upper setae strong.

Thorax. Scutum and scutellum dark brown pollen with numerous short setulae and dark brown spots at bases of all setae; anepisternum and katepisternum greybrown; haltere yellowish; wing hyaline with brownish tinge, veins dark; costal vien with strong spine at subcostal level and further four short spines; costal vein index 2.2:1.

Legs black with dark grey pollen except the most apices of femora, tibiae and tarsi, which are yellowishbrown; forefemur of male with 3 strong posteroventral setae and a row of anteroventral setae similar to those of Paralimna flexineurus Cresson [ Ale-Rocha, Mathis, 2015, Fig. 211].

Abdomen. Dark grey, subshining, with indistinct brownish anterior bands on tergites 3–5.

Male terminalia: epandrium U-shaped in posterior view; cercus long and narrow, tapered anteriorly and posteriorly, with many setae; sternite 5 trapezoid-oval with deep apical emargination, each apical lobe with 3 strong setae; presurstylus deeply bifurcate with horizontal process narrow and basoventral process long, moderately broad, rounded apically; postsurstylus long, slender, bifurcate apically, with 2 strong and 4 thinner setae at median part; in lateral view postsurstylus moderately wider medially, with two medial lobes; aedeagus oval; phallapodeme triangular in lateral view; hypandrium deeply concave; the shape of it is close to P.(P.) adunca [ Ale-Rocha, Mathis, 2015, Fig. 4 ].

ETYMOLOGY. The species name is given in honour of famous dipterologist Ian R. Bock who was the first to revise Australian fauna of Paralimna and described several species from this genus.

DISTRIBUTION. Australia (Queensland).

Figures

Figs. 1–2. Paralimna bocki sp.n., holotype ♂ (1) and Paralimna millepuncta Malloch, ♂ (2): head and thorax, lateral view. Рис. 1–2. Paralimna bocki sp.n., голотип ♂ (1) и Paralimna millepuncta Malloch, 1925, ♂ (2): голова и грудь сбоку.

Figs. 3–5. Paralimna bocki sp.n. (3–4) and Paralimna millepuncta Malloch (5): 3 — epandrium, presurstylus and postsurstylus, lateral view; 4, 5 — same, posterior view. Рис. 3–5. Paralimna bocki sp.n. (3–4) и Paralimna millepuncta Malloch (5): 3 — Эпандрий, церки и сурстили, сбоку; 4–5 — то же, сЗади.