Ollieopteryx, 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 : 568-569

Ollieopteryx , new genus

Type species: Ollieopteryx fianarana new species, original designation.

Etymology. Ollie (diminutive of Oliver) plus Greek pteryx (wing, flight); gender feminine.

This genus is named for Oliver S. Flint, Jr. in honor of his life work on Trichoptera and other “Neuropteroidea” and for showing an interesting specimen of “ Phylocentropus ” from Madagascar to JSW.

Diagnoses. The genus Ollieopteryx is similar to Phylocentropus , both having wing venation nearly complete and labial palps reduced, but Ollieopteryx differs by having mesoscutal warts round, ocellar setal warts either circular or nearly elliptical, medial cells of hind wings closed, scent glands of abdominal segment V present, and a hemogill system absent. The only other genus of Dipseudopsidae that has hind wings with medial cells closed is Dipseudopsis Walker 1852 , but its wings differ from those of Ollieopteryx by being more slender and wedge-shaped, and having hind wings with forks I and III absent. The description of the genus is based on males only, as females and immatures are unknown at this time. In comparison with the three species groups of Phylocentropus , Ollieopteryx appears to be most similar to members of the Phylocentropus auriceps Species Group ( Weaver 2020).

Description. Male. Head ( Figs 1 & 3 ). Ocelli absent; eyes large and bulbous, not setose. Antennae thick and robust, sockets of scapes close together but separated by narrow piece of frons ( Figs 1 & 3 ). Scapes each with length greater than 1.5 X width (in Fig. 1 , scapes directed anterad, but in Fig. 3 scapes directed anterodorsad). Mandibles (md.) each with curved apicomesal point ( Fig. 3 ). Laciniae (lac.) each rectangular, apical margin with 4 or more minute points ( Fig. 3 ). Maxillary palps (mx. p.) each with segment 2 shortest and thickest segment of all, with mesal tuft of setae, but without extended apicomesal lobe; segments 1 and 2 each thicker than each of segments 3, 4, and segment 5, with segment 5 longest and slenderest of all ( Fig. 2 ). Labial palps (lab. p.) each with length subequal to maxillary palp segments 1+2 ( Fig. 2 ). Haustellum (ha.) beak-like, basal 2/3 broadly rounded laterally, apical 1/3 slender lobe ( Fig. 3 ).

Dorsal setal warts of head and thorax ( Fig. 1 ) similar to those of Phylocentropus , except mesoscutal warts circular, being more similar to those of Polycentropus sensu lato ( Chamorro & Holzenthal 2011). Dorsal antennal warts connected with each other on midline, ocellar warts and occipital warts separate on midline, and ocellar warts either round or elliptical ( Fig. 1 ). Two broad anterior warts: 1) anterior dorsal wart subtriangular, and 2) anterior ventral wart semicircular; anterior dorsal wart broader than anterior ventral wart, and located just below antennal sockets and above anterior tentoria pits ( Fig. 3 ). Spur formula: 3/4/4. Abdominal hemogills absent in male. Pair of internal glands of sternite V present, each opening into capitate lobe, slightly enlarged apically ( Fig. 8 ). Hind legs each with apicomesal spur usually straight and not highly modified, but one specimen of Ollieopteryx inopinata with slightly curved apicomesal spur.

Wings ( Fig. 4 ) elliptical, venation nearly complete. Forewings (FW) each with all five apical forks (I, II, III, IV, V) present, FI, FII, and FIV sessile, FIII and FV petiolate; discoidal (dc), medial (mc), and thyridial (tc) cells closed, thyridial cell long and touching base of medial cell; crossvein c-sc present, and apex of Cu2 curving towards apex of looped 1+2+3A but not touching at arculus. Posterior notal wing process capitate. Hind wings (HW) each with venation similar to that of FW, except FIV absent, FV sessile, Cu2 straight, and all three anal veins and jugal bar reaching posterior margin separately.

Genitalia: Tergite IX broadly attached to tergite X (the only remnant of segment X), but suture between them weak (suture observed in O. fianarana , but inconspicuous in O. inopinata and O. dakshan ). Preanal appendages (pre. app.) and intermediate appendages (int. app.) originating above basal plate of inferior appendages: Acuminate or fingerlike preanal appendages bearing spiniform setae apically ( Fig. 5 ), extending posterad and adjacent to ventrolateral margins of segment IX; intermediate appendages usually near preanal appendages but in submesal position below segment IX. ( Ollieopteryx dakshan with only one set of these appendages, presumably preanal appendages, Fig. 12 ). Inferior appendages (inf. app.) each one-segmented (without articulated second article), main process either long and slender or spatulate and broad, bearing slender basodorsal process extending posterad; sometimes with other basodorsal processes or other kinds of lobes and often with subapical and apical group of short spines (or spiniform setae) mesally. Phallic apparatus long and nearly straight, tube-like, sclerotized (possibly fused phallobase-phallotheca-phallicata or phallobase alone or phallicata alone); with partially retracted endotheca apically (membranous apical part).

Female, pupa, and larva unknown.

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 5–8. Ollieopteryx fianarana n. sp., male. 5, abdominal segments VIII, IX, and X and appendages (all appendages paired), left lateral (app. = appendage); 6, abdominal segments VIII, IX and X, dorsal; 7, sternite IX with inferior appendages, preanal appendages, and intermediate appendages, ventral; 8, sternite V, left lateral.

FIGURES 12–14. Ollieopteryx dakshan n. sp., male genitalia. 12, left lateral (pre. app. = preanal appendage (paired); inf. app. = inferior appendage (paired); IX, X = abdominal segments IX and X); 13, abdominal segments IX and X and preanal appendages, dorsal; 14, abdominal segment IX and inferior appendages, ventral.