Paroxyethira dzumac Wells &amp; Johanson 2012, new species
Creators: name: Wells, A.
name: Johanson, K. A.
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Trichoptera
Hydroptilidae
Paroxyethira
Paroxyethira dzumac

description: <i>Paroxyethira dzumac</i>, new species Figs 19, 20, 39 The male is similar to that of <i>P. hamata</i>, new species, having strongly asymmetric gonopods, but is distinguished by having the phallic sheath with an apical rather than subapical process, and pair of widely separated setae; and left gonopod more slender and lacking a brush of black setae. The form of the phallic sheath resembles that of <i>P. atypica</i>, but the apical process is short, not curving broadly. Both <i>P. dzumac</i> and P. hamata have an elongate dorsal process on the female terminalia, but in <i>P. dzumac</i> the process is narrow and straplike, not expanded subapically. Male antennae each with 19 flagellomeres; female antennae each with 19 flagellomeres. Forewing length. Male 2.1–2.7 mm (n=6); female 2.2–2.5 mm (n=10). Male genitalia (Figs 19, 20): Abdominal sternite VII with small sharp median spur. Median process on abdominal sternite VIII elongate spatulate; length around 3.5x width at middle. Abdominal segment IX dorsally with distal margin deeply concave; lateral angles produced into lateral lobes that are slender in ventral view; elongate, as long as ventral process of VIII. Gonopods quite dissimilar, right stout, tapered distally to narrow apex; brush of stout black setae on mesal margin, longest near mid length; closely joined at base to very slender left gonopod without brush of setae; bearing 3–4 setae distally. Phallic apparatus slender, straight, elongate; constricted at about 1/6 length at which constriction arises a short, threadlike titillator. Phallic sheath elongate, sheathlike; with straplike apical process and single large apical seta, second similar seta at about half length. Female terminalia (Fig. 39). Abdominal sternites VII–VIII fused; broad-based; abruptly constricted to form narrow tube for distal 2/3rds; apico-ventrally truncate; apico-dorsally bearing curved, straplike sclerotised process. Dorsally tergite VIII discrete; whole structure densely setose ventrally, setal bases prominent. Segment X undivided. <b>Holotype male:</b> Province Sud, Mt. Dzumac, source stream of Ouinne River, downstream crosspoint to mountain track, 22°01.997'S, 166°28.486'E, 795 m, over about 30 m waterfall, 18.xi–4.xii.2003, Malaise trap, loc#031, leg. K.A. Johanson (MNHP). <b>Paratypes:</b> Same data as for holotype— 7 male, 21 female (1 male, 1 female on slides) (SMNH); Province Sud, Mt. Dzumac, source stream of Ouinne River, near crosspoint to mountain track, 22°02.439'S, 166°28.646'E, 805 m, 18.xi.–4.xii.2003, Malaise trap, loc#029, leg. K.A. Johanson — 2 males (SMNH). <b>Other material examined:</b> Province Sud, Mt. Dzumac, source stream of Ouinne River, near crosspoint to mountain track, 22°02.073'S, 166°28.460'E, 810 m, 18.xi–4.xii.2003, Malaise trap, loc#030, leg. K.A. Johanson — 1 female (SMNH); Province Sud, Mt. Dzumac, source stream of Ouinne River, downstream crosspoint to mountain track, 22°01.997'S, 166°28.486'E, above waterfall, 795 m, 3.xii.2003, light trap, loc#061, leg. K.A. Johanson — 1 female (SMNH). <b>Etymology:</b> <i>Dzumac</i>, derived from the type locality. <b>Remarks:</b> In a sample from a stream on Mt. Dzumac, most of the males are uniformly of this form. Among them, however, are 2 males that resemble these others, but are distinct, having the spine on the phallic sheath stouter and subapical, and the left gonopod more slender and lacking a brush of stout dark setae. They are described below tentatively as a distinct species, <i>P. hamata</i>, new species.
description: Published as part of <i>Wells, A. &amp; Johanson, K. A., 2012, Review of the New Caledonian species of Paroxyethira Mosely, 1924 (Trichoptera: Hydroptilidae), pp. 330-344 in Zootaxa 3478</i> on pages 337-338