Lamproclasiopa curva, Costa, Daniel N. R., Mathis, Wayne N. & Marinoni, Luciane, 2016

Costa, Daniel N. R., Mathis, Wayne N. & Marinoni, Luciane, 2016, A revision of the shore-fly genus Lamproclasiopa Hendel (Diptera, Ephydridae), ZooKeys 631, pp. 1-99 : 82-85

Taxon classification Animalia Diptera Ephydridae

Lamproclasiopa curva sp. n. Figs 128-131, 139

Diagnosis.

This species is distinguished from congeners by the following combination of characters: Small to moderately small shore flies, body length 1.80-2.35 mm. Head: Frons dull, anterior margin yellowish orange in some degree, posterior portion grayish black, concolorous with mesonotum, some specimens with frons entirely grayish black, without distinctly marked iridescent microtomentose stripes. Antenna mostly grayish black to black, only ventral margin of segments yellowish orange. Face nearly unicolorous, blackish gray, not distinctively marked; parafacial bare of ventroclinate setulae, generally dull, creamy white, contrasted with face. Gena moderately high, gena-to-eye ratio 0.11-0.18. Thorax: Mesonotum uniformly faintly grayish black, finely microtomentose, lacking stripes; presutural supra-alar seta well developed. Scutellum dorsally covered with fine, sparse setulae, sometimes almost bare. Wing completely hyaline, lacking pattern of spots; vein R2+3 with apical portion a continued extension of angle at merger with costa; costal vein ratio 0.43-0.45; M vein ratio 0.56-0.58. Forefemur with posteroventral setae slender, not stout and peg-like; femora and tibiae grayish black to black, apices of tibiae yellowish; tarsi entirely yellowish or with apical 1-2 tarsomeres darkened. Abdomen: Tergites more sparsely microtomentose than mesonotum, shinier black or brown, especially laterally and mostly of tergites 4 and 5. Male terminalia (Figs 128-131): Epandrium in posterior view (Fig. 128) generally oval, almost as wide as high, dorsal portion thinner, each lateral arm gradually becoming wider ventrally, ventral half with sides almost parallel sided, apex almost truncate, shallow arched, ventral 1/4 with slightly increased number of setulae, in lateral view (Fig. 129) higher than wide, dorsal half thinner and tapered to acute apex, ventral half becoming expanded, ventral margin shallowly rounded with short, anterior extension, extension tapered to anterior point; cerci in posterior view (Fig. 128) elongate, moderately thin, curvature very slight, almost straight, ventral half generally tapered to acute point, more setulose on dorsal half, in lateral view (Fig. 129) rounded posteriorly, tapered from dorsum to ventral point; gonite in lateral view (Fig. 131) robust developed, higher than wide, with posterior margin extended, keel-like, margin serrate, anterior margin straight, in ventral view (Fig. 130) with irregularly rectangular base, dorsal extension narrow, parallel sided, curved medially; aedeagus in lateral view (Fig. 131) narrowly funnel-like, wider basally, apical 3/4 tapered to acutely pointed and straight apex, in ventral view (Fig. 130) elongate, thin, uniquely and asymmetrically curved laterally, forming banana-like structure, apical half more curved, tapered to bluntly rounded apex, basal margin bilobed with deep and rather narrow medial incision; phallapodeme in lateral view (Fig. 131) shallowly L shaped, each arm tapered to narrowed, short arm toward hypandrium 1/3 length of longer, digitiform process, keel at vertex of L, robustly developed, elongate, slightly longer than dorsal arm, in ventral view (Fig. 130) as an robustly rod-like with shallowly sinuous sides, ventral apex slightly flared and shallowly bilobed, dorsal apex truncate; hypandrium in lateral view (Fig. 131) irregularly rod-like, conspicuously sinuous, both apices tapered, in ventral view (Fig. 130) asymmetrical with one lateral half shorted than opposite lateral half, anterior margin truncate, posterior margin deeply emarginate, U-shaped with elongate posterolateral extensions.

Type material.

The holotype male of Lamproclasiopa curva is labeled "Casa Pangue (41°03'S, 71° 52'W), Llanquihue, Chile Dec1926, R&EShannon//HOLOTYPE ♂ Lamproclasiopa curva Costa, Mathis & Marinoni, USNM [red]." The holotype is double mounted (glued to a paper triangle) and is in good condition (abdomen removed, dissected, and in an attached microvial) and deposited in the USNM. One paratype (1♂; USNM) bears the same label data as the holotype. Other paratypes are as follows: CHILE: Los Lagos: Chiloé Island, Chepu (on seashore; 42°5'S, 73°59.65'W), Oct 1958, G. Kuschel (4♂; USNM).

Other specimen examined. CHILE. Malleco: Angol (37°48'S, 72°43'W), 18 Oct 1931, D. S. Bullock (1♂; USNM).

Type locality.

Chile. Lanquihue: Casa Pangue (41°03'S, 71° 52'W).

Distribution

(Fig. 139). Neotropical: Chile (Lanquihue, Los Lagos, Malleco).

Etymology.

The species epithet, curva , is of Latin derivation and means curved, bent, or arched, referring to the curved aedeagus of this species.

Remarks.

Externally, this species is very similar to Lamproclasiopa aracataca and Lamproclasiopa puella , and we primarily rely on structures of the male terminalia to distinguish between these three species. The most obvious distinguishing characters are the asymmetry of the aedeagus and hypandrium in ventral view. The curved aedeagus is the basis for this species name. Other distinguishing characters of this species are the extended, narrowly rectangular keel of the phallapodeme and the gonal width with serrations along some of its posterior margin.