Lopescladius

Hagenlund, Linn K., Andersen, Trond & Mendes, Humberto F., 2010, New species of Lopescladius (Cordiella) Coffman et Roback (Chironomidae: Orthocladiinae) from Brazil, Zootaxa 2728, pp. 39-49 : 40

Lopescladius subgenus Cordiella Coffman et Roback

Type species. Lopescladius (Cordiella) hyporheicus Coffman et Roback, 1984: 131 , by original designation and monotypy.

Diagnostic characters (males). Small species, wing length 0.7–1.2 mm. Eye small, rounded, strongly protruding, placed low on head; with microtrichia as long as or slightly longer than length of ommatidium. Squama bare. All legs with single tibial spur, with lateral denticles; tarsomere 4 strongly cordiform. Abdominal tergites and sternites with few setae. Tergite IX with rounded, lateral protrusions with 1–2 strong and 3–4 weaker setae; anal point absent. Sternapodeme straight, with strong oral projections. Virga absent. Inferior volsella single or double, with long, broadly digitiform posterior branch, with or without apical hook. Gonostylus broadly rounded, lobe-like, without crista dorsalis and megaseta.

Description (males). Small species, wing length 0.7–1.2 mm.

Antenna. With 13 flagellomeres; groove beginning at flagellomere 3; sensilla chaetica on flagellomeres 2– 4 and terminal. AR 0.30–0.55.

Head. Eye small, without dorsomedial extension, strongly protruding, placed low on head; with microtrichia as long as or slightly longer than length of ommatidium. Temporal setae 1(?)–9, weak; in single, irregular line posterior on head. Third palpomere with 1 sensillum medially to subapically.

Thorax. Antepronotum reduced, lobes narrowly separated; with 1–2 lateral setae. Acrostichals absent, dorsocentrals and prealars few, supraalars absent. Scutellum with few setae, uniserial.

Wing. Membrane without setae, with fine punctuation. VR 1.10–1.60. Costa barely extended; with short, false costal extension. R2+3 weak, running and ending close to R4+5. R4+5 ending proximal to end of M3+4, distal to end of Cu1; FCu far distal to RM; Cu1 straight to weakly curved; postcubitus ending distal to FCu; An ending proximal to FCu. Brachiolum with 1 seta, other veins bare. Squama bare.

Legs. Tarsi short, giving comparatively high BV and SV. Pseudospurs and sensilla chaetica absent. Pulvilli apparently absent. All legs with single tibial spur, with lateral denticles and strongly cordiform fourth tarsomere. Comb of hind leg with 9–12 setae.

Abdomen. Tergites II–VIII with single or few strong median setae and without or with 1–2 weaker lateral setae; sternites II–VIII without or with single or few strong median setae.

Hypopygium. Tergite IX with rounded, lateral protrusions each with 1–2 strong and 3–4 weaker setae; posterior margin broadly rounded to bluntly triangular; anal point absent. Laterosternite IX without setae. Phallapodeme well developed, aedeagal lobe apparently weak or absent. Sternapodeme straight, with large oral projections. Virga absent. Gonocoxite with single or double inferior volsella; anterior branch, when present, short, nail-shaped, bare; posterior branch long, broadly digitiform, with or without hooked apex, bare or with few, weak dorsal microtrichia medially. Gonostylus broadly rounded, lobe-like, with microtrichia and few weak setae, without crista dorsalis and megaseta.

Remarks. We have not studied the type material of L. (C.) hyporheicus Coffman et Roback, 1984 , and the generic description is based on the original description and figures ( Coffman & Roback 1984) in addition to the new species described below.