Ollieopteryx inopinata, Weaver & Gibon & Chvojka & Oláh, 2020

Ollieopteryx inopinata , new species

Figs 1–2 View FIGURES 1–4 , 9–11 View FIGURES 9–11

Diagnosis. This species is similar to O. fianarana , both species having inferior appendages each long and slender and bearing a long slender basodorsal process and having preanal and intermediate appendages long and slender. Ollieopteryx inopinata differs from O. fianarana by having male segment IX+X and preanal and intermediate appendages thicker in lateral view and with shorter and stouter spiniform setae.

Description. Male. General color light brown (in alcohol). Maxillary palps with 3rd segment 1.75 X length of 1st segment, 4th segment 1.33 X length of 1st segment, and 5th segment slightly longer than segments 1+2. Wings having venation same as depicted in Fig. 4 View FIGURES 1–4 (of O. fianarana n. sp.). Forewings of holotype each 8.3 mm long, and hind wings each 7.3 mm. Head ( Fig. 1 View FIGURES 1–4 ) dorsum with posteromedian sulcus, one arched anteromedial wart, one pair of small central warts, and one pair of large posterolateral warts. Maxillary palps small ( Fig. 2 View FIGURES 1–4 ), each with relative length ratios of segments: 1, 1, 1.6, 1, 2. Labial palps reduced, each with total length equal to that of first two segments of maxillary palps.

Genitalia ( Figs 9–11 View FIGURES 9–11 ): Sternite IX subtriangular in lateral view; tergite IX articulating anteriorly with sternite IX and fused with base of tergite X (line of fusion not discernible). Preanal appendages ( pre. app.), each with apical portion adjacent to ventrolateral margin of segment IX + X, curved slightly and bearing short and stout dorsal preapical and apical spiniform setae. Intermediate appendages ( int. app.) slightly shorter than preanal appendages, each bearing many short spiniform setae along its ventral margin. Inferior appendages ( inf. app.) each with two branches: 1) ventral main branch long, slightly longer than tergites IX + X, nearly straight with apex curved slightly dorsad in lateral view, with dense patch of short spiniform setae before furcation on basomesal surface; 2) basodorsal branch slender, rod-like, 3/4 as long as main branch, base directed posterodorsad, extended posterad and inclined slightly downward toward subapex of main branch. Phallic apparatus long, almost straight, with ventral margin slightly concave; partially retracted endotheca without identifiable enclosed sclerotized structure.

Holotype: MADAGASCAR: Toamasina Province, small tributary of the Sahatandra River, road to Lakato , 19°03’30’’S, 48°21’50’’E, 1.075 m a.s.l., male, 19.x.1995, light-trap, F-M. Gibon leg. (CBGP); mounted on a slide in Euparal GoogleMaps . Paratype: male, small tributary of the Rianila , now included in the Mantadia National Park, 18°56’47’’S, 48°25’26’’E, 950 m a.s.l., 27.xi.1996, light-trap, F-M Gibon leg. (CBGP); mounted on a slide in Euparal GoogleMaps .

Etymology: Latin adjective, inopinata , unexpected, or surprised.

Distribution: Known from only the Rianila River basin of Madagascar.