Mimapsilopa iguassu Mathis

Mathis, Wayne N., Costa, Daniel N. R. & Marinoni, Luciane, 2015, A review of Mimapsilopa Cresson (Diptera: Ephydridae) from Brazil, Zootaxa 3926 (4), pp. 499-522 : 505-508

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https://doi.org/ 10.11646/zootaxa.3926.4.3

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Mimapsilopa iguassu Mathis


Mimapsilopa iguassu Mathis , Costa & Marinoni n.sp.

Figs. 8–15 View FIGURES 8 – 10 View FIGURES 11 – 15 , 49 View FIGURES 46 – 51 , 52 View FIGURE 52 .

Diagnosis. This species is distinguished from congeners by the following combination of characters: Generally very dark brown, shiny; small to moderately small shore flies, body length 1.40–2.30 mm. Head ( Figs. 8–10 View FIGURES 8 – 10 ): Frons microtomentose brown on black background. Basal flagellomere mostly blackish, especially dorsoapically, only basoventromost portion yellowish, gradually tapered to rounded apex; arista with 7–10 dorsal rays. Face mostly shiny bluish black to black, conspicuously microsculptured with shallow, mostly vertical and transverse striae. Eye ratio: 0.59–74; gena-to-eye ratio: 0.11–0.14. Thorax: Mesonotum sparsely microtomentose with brown microtomentum on shiny black background, appearing subshiny; anepisternum mostly shiny, only extreme margins microtomentose. Wing ( Fig. 49 View FIGURES 46 – 51 ) mostly infuscate, anterior margin brown, becoming progressively lighter colored posteriorly, posterior margin largely hyaline; length 1.50–2.20 mm; costal ratio 0.57–0.69; M vein ratio 0.73–0.91. Knob of halter white, stem yellowish. Foreleg, including forebasitarsomere and femora, and tibiae of mid- and hindlegs dark brown to black; extreme apex of mid- and hindtibiae and mid- and hindtarsi yellow except for darkened apical tarsomere. Abdomen: Tergites sparsely microtomentose, mostly shiny; tergites 4, 5 about equal in length, both longer than tergite 3; tergite 5 bare, shiny. Male terminalia ( Figs. 11–15 View FIGURES 11 – 15 ): Epandrium in posterior view ( Fig. 11 View FIGURES 11 – 15 ) setulose with short, moderately stout setulae, shape as an inverted, thick-walled U, widest at dorsolateral corners, conspicuously thinner at dorsal portion above cercal cavity, in lateral view ( Fig. 12 View FIGURES 11 – 15 ) height double width, anterior margin sinuous and with sub-basal short projection, posterior margin nearly straight; cercus in posterior view ( Fig. 11 View FIGURES 11 – 15 ) elongate, shallowly lunate but not sharply pointed at ventral and dorsal apices, in lateral view ( Fig. 12 View FIGURES 11 – 15 ) semi-hemispherical; presurstylus symmetrical, robust, in posterior view ( Fig. 11 View FIGURES 11 – 15 ) with one short medial lobe bearing an apical, stout setulae, thereafter ventrally robustly developed, ventral margin rounded, slightly tapered in lateral view ( Fig. 12 View FIGURES 11 – 15 ) quadrate on basal half, thereafter apically with short, thumb-like, broadly rounded apical process; postsurstylus symmetrical, in lateral view ( Fig. 15 View FIGURES 11 – 15 ), elongate, moderately narrow, sinuous, bearing short, fringe-like setulae on posterior margin, in ventral view ( Fig. 13 View FIGURES 11 – 15 ) pointed medially, angulate subapically, apex truncate, lacking a rod-like, extended process; subepandrial plate in ventral view moderately and widely U-shaped, lateral arms recurved, tapered toward apex, in lateral view ( Fig. 15 View FIGURES 11 – 15 ) as a parallelogram; aedeagus in lateral view ( Fig. 15 View FIGURES 11 – 15 ) somewhat rectangular on basal half, apical portion narrower, digitiform, apex narrowly rounded, in ventral view ( Fig. 14 View FIGURES 11 – 15 ) elongate, base ovate, apical third abruptly narrowed, narrowly digitiform; phallapodeme in lateral view ( Fig. 15 View FIGURES 11 – 15 ) broadly helmut-like, extended keel wide and moderately high, in ventral view ( Fig. 14 View FIGURES 11 – 15 ) elongate, slender, T-shaped; pregonite fused, in lateral view ( Fig. 15 View FIGURES 11 – 15 ) a curved, rod-like process, bearing 2 setulae apically; hypandrium in ventral view ( Fig. 14 View FIGURES 11 – 15 ) broadly and robustly semi-circular, anterior margin broadly rounded, laterobasal margin with angulate extension, thereafter posteriorly narrowed, in lateral view ( Fig. 15 View FIGURES 11 – 15 ) deeply pocket-like but with deep emargination, basal portion curved, bar-like, anterior portion triangular.

Type material. The holotype male is labeled BRAZIL. Paraná: Parque Iguaçu[,] 25°33.4'S, 49°13.6'W; 880 m), 22Jan 2010 [,] D. & W. N. Mathis/ Holotype ♂ Mimapsilopa iguassu Mathis , Costa, & Marinoni DZUP [red]. The holotype is double mounted (minuten in a block of plastic elastomer), is in excellent condition, and is deposited in DZUP. Twenty-three paratypes (12♂, 11♀; DZUP, USNM) bear the same locality data as the holotype but with dates from 22 Jan–14 Apr 2010.

Type locality. BRAZIL. Paraná: Parque Iguaçu (25°33.4'S, 49°13.6'W; 880 m).

Distribution ( Fig. 52 View FIGURE 52 ). Neotropical: Brazil (Paraná).

Etymology. The species epithet, iguassu , refers to the type locality, Parque Iguaçu, in the Municipality of Curitiba, Brazil, and is a noun in apposition.

Remarks. Externally this species is similar to M. acta but can be distinguished from it and other congeners, especially those of the cressoni group, by the coloration and shape of the basal flagellomere, the pattern of infuscation of the wing, and by structures of the male terminalia.


Universidade Federal do Parana, Colecao de Entomologia Pe. Jesus Santiago Moure


Smithsonian Institution, National Museum of Natural History













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