Notopeza, Chandler, 2024

Chandler, Peter J., 2024, Notopeza, a new genus of Platypezidae (Diptera) from Chile, Acta Entomologica Musei Nationalis Pragae 64 (1), pp. 107-112 : 109-110

Notopeza gen. nov.

( Figs 1–7 )

Type species. Platypeza brunnescens Collin, 1931: 50 , here designated.

Diagnosis. Resembling Seri Kessel & Kessel, 1966 and Bolopus Enderlein, 1932 in both sexes being dark coloured without distinctive markings and in the forking of vein M 1+2 at least as far from the wing margin as from crossvein dm-m; differing from both in presence of an anteroventral as well as a posteroventral spur at apex of mid tibia. Male differs from both in its strongly setose head, with a group of long upcurved setae on upper part of frons and long dense setae extending from gena onto broad parafacial reaching close to level of antennae [ Seri has a group of short setae on upper part of frons, absent in Bolopus , but in both genera setae do not extend onto the parafacial from the gena]; antenna with long setae on pedicel extending beyond tip of postpedicel (= first flagellomere) [as in Bolopus ; setae on pedicel are shorter than postpedicel in Seri ], but with a terminal arista [as in most Platypezidae ; set near to dorsal margin of postpedicel in the male of Bolopus ]. Male terminalia: hypandrium with thick curved blunt-ended apical process (gonopod, pregonite or hypandrial lobe) on each side [similar to Seri , this process more tapered apically in Bolopus ; Platypeza , which also has a strongly setose male head, lacks the extension of the hypandrium into gonopods but has a strongly developed phallapodeme extending beyond the sides of the hypandrium]; epandrium large with surstylus fused to it basally [articulating in Bolopus and Seri ], tapered to a blunt point in lateral view, with medially broadened base in posterior view; phallus short and blunt apically with a warty surface on the apical part [closer to Bolopus in that respect; Seri has a long cylindrical, apically pointed, phallus as in most Platypezinae ]; phallapodeme also short, articulating with phallus; short sclerotised ejaculatory duct enclosed within segment 8 [as in Seri , Bolopus and Polyporivora ].

Etymology. From Greek notos = southern and the terminal part of the generic name Platypeza , emphasising the southern distribution and its occurrence in forests of Nothofagus (Southern Beech; nothos = false, but meaning of notos may also have been intended in the naming of that genus). Gender is feminine.

Figures

Fig. 1. Notopeza brunnescens (Collin, 1931), holotype, female.

Figs 2–3. Notopeza brunnescens (Collin, 1931), male head: 2 – dorsal view; 3 – lateral view.

Fig. 4. Notopeza brunnescens (Collin, 1931), male wing.

Figs 5–7. Notopeza brunnescens (Collin, 1931), male terminalia: 5 – lateral view; 6 – hypandrial view; 7 – epandrial view. Abbreviations: ce – cercus; ep – epandrium; gp – gonopod (hypandrial lobe); hp – hypandrium; ht – hypoproct; pe – phallapodeme; ph – phallus; ss – surstylus.