Paracoenia (Paracoenia) wirthi Mathis
Creators: name: Mathis, Wayne N.
name: Marinoni, Luciane
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Ephydridae
Paracoenia
Paracoenia wirthi

description: 5. Paracoenia (Paracoenia) wirthi Mathis
Figs. 27–34, Map 5
Paracoenia (Paracoenia) wirthi Mathis 1975: 78 [United States. California. Inyo: Tecopa Hot Springs (1.6 km N); HT ♂, CAS (12033)].— Mathis 1980: 9 –11 [revision].— Mathis and Zatwarnicki 1995: 251 [world catalog].
Diagnosis. This species is distinguished from congeners, especially P. bisetosa, by the following combination of characters: Medium-sized shore flies, body length 3.12–3.65 mm; subshiny dorsally, bluish green to green metallic luster.
Head (Figs. 27–28): Mesofrons greenish blue, shiny; fronto-orbital areas dark brown, microtomentose to subshiny. Face densely microtomentose, grayish tank, dorsum of facial hump slightly darker than face, grayer; paravertical setae shorter than their distance apart; gena-to-eye ratio 0.30; eye ratio 0.64, height-to-length ratio 0.91; eye-width-to-face-length ratio 0.44.
Thorax: Mesonotum (Fig. 29) with anterior area slightly microtomentose, becoming subshiny to shiny posteriorly; acrostichal setulae in 3–4 rows anteriorly, becoming irregular, 5–6 rows posteriorly. Mesopleuron with more subdued coloration than mesonotum, mostly olivaceous gray. Wing nearly transparent to faintly brown.
Abdomen: Concolorous with mesonotum; digitiform lateral process of male tergite 5 elongate, acutely pointed apically; male sternite 5 (Fig. 34) broadly U-shaped with posteriorly extended arms oriented posteriorly, acutely pointed, anterior margin somewhat truncate, posterior margin moderately deeply emarginate. Male terminalia (Figs. 30–32): Surstylus in posterior view with base robustly developed, width 3X apical width, thereafter abruptly narrowed with apical extension narrowly digitiform; medial triangular process less than half length of surstylar arm, not cleft apicomedially; gonite more or less triangular, sider basally, apical half tapered, apex digitiform, apex rounded. Female ventral receptacle as in Fig. 33 with large, mushroom-like operculum.
MAP 5. Distribution map for Paracoenia wirthi Mathis.
Type material. The holotype male is labeled “ USA. CALIF. Inyo Co 1 mi N Tecopa Hot Spg 24 June 1974 [,] Wayne N. Mathis/ HOLOTYPE Paracoenia wirthi Mathis [red; 12033].” Allotype and 21 paratypes (7♂, 14♀; CAS, USNM) bear the same label data as the holotype. Other paratypes as listed in Mathis (1975:78). The holotype male is double mounted (minute nadel), is in excellent condition, and is deposited in the CAS (12033).
Type locality. United States. California. Inyo: Tecopa Hot Springs (1.6 km N; 35°52.7'N, 116°13.9'W); HT ♂, CAS (12033).
Other specimens examined. MEXICO. Baja California: Guadalupe Canyon (32°09.3'N, 115°47.4'W), 19 May 1957, F. X. Williams (1♂, 3♀; CAS). Distrito Federal: Mixquic, Chalco Lake (9 km NW; 19°15.5'N, 98°58.6'W), 1 Aug 1965, K. R. Valley (4♂, 16♀; CAS, USNM).
Distribution (Map 5). Nearctic: United States (California). Neotropical: Mexico (Baja California, Distrito Federal).
Remarks. This species is similar to P. bi s pi no s a but is slightly smaller in body length and less setulose. The ventral margin of the male sternite five is broadly U-shaped, and the connecting bridge is wide; the male tergite five is produced into an acutely pointed process; and the surstylus is more robustly developed basally, and the distal surstylar extensions are narrowly digitiform; the gonite is narrowed toward the apex, and the apex is digitiform, apically rounded.
description: Published as part of Mathis, Wayne N. & Marinoni, Luciane, 2016, Revision of Ephydrini Zetterstedt (Diptera: Ephydridae) from the Americas south of the United States, pp. 1-110 in Zootaxa 4116 (1) on pages 24-27, DOI: 10.11646/zootaxa.4116.1.1, http://zenodo.org/record/257322