Lamproclasiopa caligosa, 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 : 80-82

Taxon classification Animalia Diptera Ephydridae

Lamproclasiopa caligosa sp. n. Figs 124-127, 139

Lamproclasiopa puella of authors, not Cresson (misidentification). Zatwarnicki and Mathis 2001: 41 [illustration of male terminalia].

Diagnosis.

This species is distinguished from congeners by the following combination of characters: Small to moderately small shore flies, body length 1.80-2.80 mm. Head: Frons dull, uniformly grayish black concolorous with mesonotum, some specimens with anterior margin yellowish orange, except for ocellar triangle and fronto-orbital stripe slightly grayer, without distinctly marked iridescent microtomentose stripes, some specimens with anterior margin faintly reddish orange. Antenna mostly grayish black to black, only ventral margin of segments yellowish orange. Face nearly unicolorous, grayish black, not distinctively marked; parafacial bare of ventroclinate setulae, generally dull, creamy white anteriorly, grayish black ventrally, similar to facial color. Gena moderately high, gena-to-eye ratio 0.15-0.18. Thorax: Mesonotum uniformly faintly grayish to brownish black, finely microtomentose, faintly subshiny, lacking stripes; presutural supra-alar seta well developed. Scutellum dorsally covered with strong setulae. Wing completely hyaline to faintly infuscate, lacking pattern of spots; vein R2+3 with apical portion a continued extension of angle at merger with costa; costal vein ratio 0.45-0.55; M vein ratio 0.54-0.59. 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 124-127): Epandrium in posterior view (Fig. 124) generally oval, as high as wide, dorsal portion thin, each lateral arm gradually becoming wider ventrally, widest subapically, apex tapered, shallowly recurved, rounded pointed, ventral half with slightly increased number of setulae; cerci in posterior view (Fig. 124) elongate, thin, generally shallowly arched, ventral half generally tapered to acute point, slightly curved, setulose on dorsal 2/3; gonite in lateral view (Fig. 127) rod-like, shallowly arched, apical half toward aedeagal base digitiform, almost parallel sided, basal half wider than apical half, apex truncate with tiny, narrow emargination, basolateral margin irregularly serrate, in ventral view (Fig. 126) irregularly clavate apical half narrow, parallel sided, basal half becoming wider with subapical notch, thereafter thumb-like; aedeagus in lateral view (Fig. 127) narrowly funnel-like, wider basally, apical 2/3 tapered to acutely pointed and curved apex, in ventral view (Fig. 126) elongate, thin, tapered very gradually from base to subapex, apical portion more abruptly tapered to pointed apex; phallapodeme in lateral view (Fig. 127) shallowly L shaped, each arm tapered to narrowed apex, short arm toward hypandrium 1/3 length of longer and wider than dorsal arm toward aedeagal base, shallow keel at vertex, slightly extended, in ventral view (Fig. 126) as an inverted bottle with basal 2/3 very shallowly arched, nearly parallel sided, neck robust, slightly flared apically, apex with medial, short, narrow emargination; hypandrium in lateral view (Fig. 127) irregularly rod-like, sinuous, both apices tapered, posterior apex narrowly digitiform, anterior apex tapered to acute point, in ventral view (Fig. 126) with anterior half robustly developed, more or less quadrate, anterolateral corners slightly extended anteriorly, anterior margin shallowly emarginate, posterior extensions elongate, slightly tapered, directed posterolaterally, posterior margin deeply emarginate, widely U-shaped.

Type material.

The holotype male of Lamproclasiopa caligosa is labeled "CHILE. Osorno: Anticura (1 km W; 40°39'S, 72°10'W; 430 m), 5 Feb 1978[,], W. N. Mathis/HOLOTYPE ♂ Lamproclasiopa caligosa Costa, Mathis & Marinoni USNM [red]." The holotype is double mounted (minuten pin in a block of plastic), is in excellent condition, and is deposited in USNM. Five paratypes (5♂, DZUP, USNM) bear the same label data as the holotype. A male paratype (USNM) is as follows: CHILE. Bío Bío: Santa Bárbara (25 km E; 37°44.4'S, 71°47.9'W; 350 m), 24 Jan 1978, W. N. Mathis.

Other specimens examined.

CHILE. Bío Bío: Santa Barbara (25 km E; 37°29.3'S, 72°4.1'W; 350 m), 24 Jan 1978, W. N. Mathis (1♀; USNM). Osorno: Anticura (1 km W; 40°39'S, 72°10'W; 430 m), 1-6 Feb 1978, W. N. Mathis (19♂, 26♀; USNM); Laguna El Toro (40°45.2'S, 72°18.5'W; 780 m), 8 Feb 1978, W. N. Mathis (2♂; USNM); Termas de Aguas Calientes (1 km SE; 40°41'S, 72°21'W; 530 m), 7-8 Feb 1978, W. N. Mathis (1♂; USNM).

Type locality.

Chile. Osorno: Anticura (1 km W; 40°39'S, 72°10'W; 430 m).

Distribution

(Fig. 139). Neotropical: Chile ( Bío Bío, Osorno).

Etymology.

The species epithet, caligosa , is of Latin derivation and means misty, obscure or uncertain, referring to the difficulty in distinguishing this species from congeners, especially Lamproclasiopa puella .

Remarks.

Externally, this species is very similar to Lamproclasiopa puella , leading to the confusion and misidentification of this species with Lamproclasiopa puella ( Zatwarnicki and Mathis 2001). The structures that Zatwarnicki and Mathis (2001) illustrated of the so-called Lamproclasiopa puella are actually of this species. This species is distinguished from Lamproclasiopa puella by the posterior hypandrial arms being more widely separated and more flared laterally, and the aedeagal base in lateral view is wider, almost bulbous, and has a more abrupt taper after the basal one-third, and the apex is curved anteriorly and acutely pointed.