Allotrichoma (Allotrichoma) schumanni Papp

Mathis, Wayne N. & Zatwarnicki, Tadeusz, 2012, Revision of New World Species of the Shore-fly Subgenus Allotrichoma Becker of the Genus Allotrichoma with Description of the Subgenus Neotrichoma (Diptera, Ephydridae, Hecamedini), ZooKeys 161, pp. 1-101 : 51-53

Allotrichoma (Allotrichoma) schumanni Papp Figs 5762

Allotrichoma laterale of authors, not Loew 1860 [misidentification in part]. Becker 1896: 121 [generic combination]. Williston 1897: 4 [compared with Allotrichoma abdominale Williston]. Cresson 1942: 108 [list, west coast of United States]. Wirth and Stone 1956: 467 [key]. Wirth 1965: 736 [Nearctic catalog, in part]. Cole 1969: 397 [list]. Mathis and Zatwarnicki 1995: 151-152 [world catalog, in part].

Allotrichoma schumanni Papp 1974: 405 [Hungary. Gyón; HT ♂, HNHM]. Mathis and Zatwarnicki 1995: 153 [world catalog].

Description.

This species is distinguished from congeners by the following combination of characters: Small to moderately small shore flies, body length 1.40-2.00 mm. Head: Medial facial carina above facial prominence shallow; labella broad, fleshy, shorter than mediproboscis; clypeus microtomentose, usually gray.

Thorax: Presutural supra-alar seta present. Pleural area lacking stripes. Wing with costal vein ratio 0.30-0.33; M vein ratio 0.37-0.46. Legs blackish brown to black; midtibia bearing numerous, erect setae along dorsal surface.

Abdomen: Male 5th sternal flap in lateral view (Fig. 61) moderately and irregularly elongate, bearing several, tuberculate setulae apically; 5th medial process in lateral view (Fig. 61) elongate, conspicuously curved, C-shaped, bearing 5-6 setulae anteroapically. Male terminalia (Figs 57-60): Epandrium in posterior view (Fig. 57) like an i nverted, laterally rounded, almost oval U; epandrium in lateral view (Fig. 58) relatively narrow dorsally, becoming wider ventrally, slightly projected posteroventrally; cercus in lateral view (Fig. 58) essentially straight, wide dorsally, than narrowed but very gradually becoming wider ventrally, as wide subapically as dorsal width, then tapered more abruptly to narrowly rounded apex, apex bearing long and apically curved setulae especially evident on ventral margin; cercus in posterior view (Fig. 57) as a elongate, somewhat pendulous, ventrally projected process, gradually becoming wider ventrally, apex truncate to very shallowly emarginate at an oblique angle, apex slightly longer laterally than medially, apex bearing numerous, very long setulae; surstyli (ventral extensions of epandrium) in posterior view as parallel, narrow processes that bear setulae on apex, apex not broadened or curved; surstylus in lateral view narrow, elongate, conspicuously curved, apical portion not expanded, bearing setulae apically; aedeagus in ventral view (Fig. 59) elongate, narrowly ovate, slightly tapered apically, in lateral view (Fig. 60) elongate, shallowly and narrowly lunate; phallapodeme in lateral view (Fig. 60) narrowly triangular, keel shorter than length, almost digitiform; gonite in ventral view (Fig. 59) somewhat bar-like, lateral margin very shallowly concave, with short, subapical, medial process, apex of process bearing a setula, and a short, apical process that likewise bears a short setula; gonite in lateral view (Fig. 60) wide basally, gently curved and tapered toward apex, with a subapical, short process that bears a setula and an apical setula.

Type material.

The holotype male is labeled “Gyón [Hungary] Kertész [handwritten] on the reverse: "1904. VII. 8" [on reverse]/Allotrichoma n. sp. det. Becker ["Allotrichoma n. sp." handwritten]/Holotypus Allotrichoma schumanni ♂ L. Papp [Holotypus red; species name handwritten; margin of label red]." The holotype is double mounted, is in good condition, and is deposited in the HNHM.

Type locality.

Hungary. Gyón (47°11'N, 19°19'E).

Other specimens examined from the New World.

UNITED STATES. COLORADO. Archuleta: Pagosa Springs (37°15.8'N, 107°00.7'W), 27 May 1969, W. W. Wirth (1♂, 4♀; USNM). Boulder: Middle Boulder Creek (16 km W Boulder; 40°00.3'N, 105°24.4'W; 2280 m), 8 Aug 1972, P. H. Arnaud, Jr. (6♂, 8♀; CAS, USNM).

Distribution.

(Fig. 62) Nearctic: United States (Colorado). Palearctic: Belgium, Czech Republic, Hungary, Italy, Poland, Switzerland.