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

Weaver, John S., Gibon, François-Marie, Chvojka, Pavel & Oláh, János, 2020, Ollieopteryx, a new genus of caddisflies from Madagascar (Trichoptera Dipseudopsidae), Zootaxa 4890 (4), pp. 567-577 : 571-572

Ollieopteryx inopinata , new species

Figs 1–2 , 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 (of O. fianarana n. sp.). Forewings of holotype each 8.3 mm long, and hind wings each 7.3 mm. Head ( Fig. 1 ) 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 ), 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 ): 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 . 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 .

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

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

Figures

FIGURES 1–4. Ollieopteryx spp., males. 1 & 2, Ollieopteryx inopinata n. sp.: 1, head (antennal, ocellar, and occipital warts), prothorax, and mesothorax (scutal and scutellar warts). 2, maxillary and labial palps, right and left, respectively. 3 & 4, Ollieopteryx fianarana n. sp.: 3, head, anterior [ant. dor. = anterior dorsal wart, ant. ven. = anterior ventral wart, md. = mandible (paired), lab. p. = labial palp (paired), ha. = haustellum, lac. = lacinia (paired), mx. p. = maxillary palp (paired)]. 4, right wings, dorsal, abbreviations: C = costa; Sc = subcosta; R1, R2, R3, R4, R5 = branches 1–5 of radius; M1, M2, M3, M4 = branches 1–4 of media; Cu1a = anterior branch of cubitus 1; Cu1b = posterior branch of cubitus 1; Cu2 = cubitus 2; 1A, 2A, 3A = anal veins 1–3; P = plica (fold); J = jugal bar; I. II, III, IV, V = forks 1–5; h = humeral crossvein; r = radial crossvein; s = sectoral crossvein; r-m = radial-medial crossvein; m = medial crossvein; m-cu = medial-cubital crossvein; cu = cubital crossvein; cu-a = cubitalanal crossvein; dc = discoidal cell; mc = medial cell; th = thyridial cell.

FIGURES 9–11. Ollieopteryx inopinata n. sp., male genitalia. 9, left lateral (pre. app. = preanal appendage (paired); int. app. = intermediate appendage (paired); inf. app. = inferior appendage (paired); IX, X = abdominal segments IX and X); 10, abdominal segments IX and X, and preanal and intermediate appendages, dorsal; 11, inferior appendages, dorsal.