Lamproclasiopa polita (Edwards)

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 : 33-34

Taxon classification Animalia Diptera Ephydridae

Lamproclasiopa polita (Edwards) Figs 37-38, 39-42, 104

Ditrichophora polita Edwards 1933: 117.

Discocerina (Basila) polita . Cresson 1946: 149 [generic combination]. Wirth 1968: 7 [Neotropical catalog]. Lizarralde de Grosso 1989: 24 [list, Argentina]. Lizarralde de Grosso et al. 2011: 13 [Argentina catalog]. Mathis and Zatwarnicki 1995: 165 [world catalog].

Lamproclasiopa polita . Zatwarnicki and Mathis 2001: 39 [generic combination].

Diagnosis.

This species is distinguished from other congeners by the following combination of characters: Small to moderately small shore flies, body length 1.60-2.70 mm; generally a shiny black species. Head: Frons shiny black. Antenna black except for basoventral yellowish orange to orange of basal flagellomere. Face black except for silvery gray, microtomentose antennal grooves, microtomentum sometimes extended ventrally onto ventral portion of face, in lateral view rounded, obtusely angulate, greatest extension at midheight. Antenna black. Gena high; gena-to-eye ratio 0.30-0.34. Thorax: Mesonotum and pleural areas shiny black; presutural supra-alar seta well developed. Wing hyaline, immaculate; costal vein ration 0.43-0.45; M vein ratio 0.52-0.57. Legs black, mostly shiny except for yellow basal 2 tarsomeres; forefemur with 4-5 stout, peg-like setae on apical third along posteroventral margin; Abdomen: Tergites shiny black, almost completely bare of microtomentum; male tergite 5 more or less triangular, posterior margin narrowly rounded. Male terminalia (Figs 39-42): Epandrium in posterior view (Fig. 39) more or less oval, flattened dorsally, narrowed ventrally, setulae more evident ventrally, in lateral view (Fig. 40) longer than wide, ventral half robust, widest just ventrad of midheight, narrowly rounded at apex; cerci in posterior view (Fig. 39) narrow, elongate, slightly curved, ventral apex narrowly pointed, in lateral view (Fig. 40) as an elongated teardrop, shallowly curved, wider dorsally, ventral portion becoming narrower ventrally; gonite in lateral view (Fig. 42) elongate, posterior margin more or less evenly developed, anterior margin with angular protuberance, ventral apex shallowly bifurcate, in ventral view (Fig. 41) robustly developed medially, apices thin, angulate laterally; aedeagus in lateral view (Fig. 42) clavate, base narrower than globular apex, rounded apically, in ventral view (Fig. 41) with base quadrate with short triangular extension; phallapodeme in lateral view (Fig. 42) robustly L-shaped, in ventral view (Fig. 41) dome-like; hypandrium in lateral view L-shaped, anterior portion longer and more robustly developed than narrow, posterior portion, in ventral view (Fig. 41), slightly more than semicircular, broadly and evenly rounded.

Type material.

The holotype female of Ditrichophora polita Edwards is labeled "Holotype/Type/Argentina: Terr. Río Negro. F.&M. Edwards. B.M. 1927-63./Lake Gutiérrez 3-14.xi.1926./ Ditrichophora polita Edw. F. W. Edwards det. 1932/HOLOTYPE Ditrichophora polita Edwards det. J.E. Chainey, 1995/NHMUK010240990. The holotype is double mounted (glued to a plastic triangle), is in good condition, and is deposited in the BMNH.

Type locality.

Argentina. Río Negro: Lake Gutiérrez (41°11.5'S, 71°23.7'W).

Other specimens examined.

CHILE. Atacama: Huasco (28°28'S, 71°13.1'W), 21 Oct 1957, L. E. Peña (1♂, 1♀; USNM). Cautin: Temuco (20 km E; 38°44'S, 72°35'W), 7 Jan 1951, A. E. Michelbacher, E. S. Ross (1♀; USNM). Coquimbo: Incahuasi (27°02'S, 68°18'W), 30 Sep 1952, P. G. Kuschel (13♂, 7♀; USNM); Ovalle (32 km SE; 30°36'S, 71°11'W), 12 Dec 1950, A. E. Michelbacher, E. S. Ross (3♂, 2♀; USNM). Lanquihue: Peulla (41°28'S, 72°57.7'W) (1?; BMNH); Puerto Varas (41°18.6'S, 72°59.6'W) (1♂; BMNH). O’Higgins: Río Claro (5 km N Rengo; 34°24'S, 70°52'W; 300 m), 23 Jan 1978, W. N. Mathis (1♀; USNM). Osorno: Anticura (4 km W; 37°40'S, 72°01'W; 400 m), 3 Feb 1978, W. N. Mathis (3♂, 4♀; USNM); Anticura (1 km W; 40°39'S, 72°10'W; 430 m), 5-12 Feb 1978, W. N. Mathis (1♂; USNM); Lago Puyehue (SE shore; 40°45'S, 72°25.2'W), 6-10 Feb 1978, W. N. Mathis (4♂, 1♀; USNM); Lago Rupanco, El Encanto (40°49'S, 72°28'W), 6 Feb 1978, W. N. Mathis (1♂, 1♀; USNM); Laguna El Pato (41°10'S, 73°40'W; 1100 m), 13 Feb 1978, W. N. Mathis (2♂, 2♀; USNM); Termas de Aguas Calientes (1 km SE; 40°41'S, 72°21'W; 530 m), 7-8 Feb 1978, W. N. Mathis (2♂, 2♀; USNM). Santiago: El Alfalfal (33°30'S, 70°11'W; 1320 m), 22 Jan 1978, W. N. Mathis (1♂, 2♀; USNM); Quebrada de la Plata (near Maipú; 33°30'S, 70°55'W; 550 m; Malaise trap), 12 Mar 1986, M. E. Irwin (1♂; USNM). Talca: Río Lircay (11 km N Talca; 35°23'S, 71°39'W; 85 m), 23 Jan 1978, W. N. Mathis (2♂, 7♀; USNM).

Distribution

(Fig. 104). Neotropical: Argentina ( Río Negro), Chile (Atacama, Cautin, Coquimbo, Lanquihue, Malleco, O’Higgins, Osorno, Santiago, Talca).

Remarks.

Although similar to Lamproclasiopa auritunica and Lamproclasiopa lapaz in having a high gena (gena-to-eye ratio 0.30-0.34), this species is unlike these two species by having a nearly bare and shiny male frons; a triangular-shaped male tergite five, which is narrowly rounded posteriorly; a rounded epandrium, and an aedeagus without any kind of division.