Claassenia drukpa Stark &amp; Sivec 2010, sp. n.
Creators: name: Stark, Bill P.
name: Sivec, Ignac
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Perlidae
Claassenia
Claassenia drukpa

description: <i>Claassenia drukpa</i> sp. n. (Figs. 1-11) <b>Material examined.</b> Holotype &amp;male; and 2&amp;male;, 1&amp;female; paratypes from Bhutan, Punakha, Dungkhar Rongchhu, 27° 29’ N, 89° 46’ E, 1370 m, 24 April 2006, H. Malicky (PMSL). <b>Adult habitus.</b> General color tan patterned with darker brown. Head with dark pigment in ocellar triangle invaded by pale pigment (Fig. 1); lappets dark brown but most of head pale brown. Basal antennal segment brown, segments 2-3 dark brown and remainder of flagellum pale brown. Pronotum margined laterally, posteriorly, anteriorly and along median suture with dark brown pigment; disk pale brown. Femora mostly pale brown, tibiae dark at knee but pale brown over most of surface (Fig. 5). Wings with pale brown tint. <b>Male.</b> Brachypterous, forewing length ca. 5 mm. Hemitergal lobes short, finger-like, projecting upward in lateral aspect and slightly forward of median in dorsal aspect (Figs. 2-4); apical third and dorsal margin of hemiterga dark brown. Tergum 9 bearing a median hump covered with a circular patch of small sensilla basiconica (Fig. 2). <b>Female.</b> Macropterous, forewing length ca. 26 mm. Subgenital plate projects over base of sternum 9 as a short triangular process with shallow median notch on posterior margin (Fig. 6). Vagina a membranous flattened bag with rectangular outline and short, partially fused accessory glands at anterior angles; anterior margin of vagina bearing a median sclerite and posterior half sparsely lined with fine setal spines (Fig. 7). Spermatheca swollen, balloon-like and attached to vagina by a short, slender stalk. <b>Larva.</b> Unknown. <b>Egg.</b> Outline oval, length ca. 420 μm, equatorial width ca. 354 μm (Fig. 8). Collar button- like, set on a raised, disc-like platform ca. 100 μm in diameter; margins irregularly crenulate and bearing short, obscure vertical struts (Figs. 8-10); anchor a relatively plain membranous bell-shaped structure with short cylindrical pedicel (Fig. 9). Chorionic surface punctate throughout, but mesal band including mixed larger, regularly spaced punctations and smaller irregularly spaced ones (Fig. 11); punctations on anterior pole shallow, fine and barely discernable at 500X. Micropylar row subequatorial, set ca. 135 μm from anterior end. <b>Etymology.</b> The species name, used as a noun in apposition, is based on the Bhutanese word for dragon people, and honors the people and history of Bhutan. <b>Diagnosis.</b> Males of this species are distinguished by the short, upwardly directed hemiterga and females by the triangular, projecting and apically notched subgenital plate. This species is the only known <i>Claassenia</i> in which the egg form varies from the usual spindle shape.
description: Published as part of <i>Stark, Bill P. &amp; Sivec, Ignac, 2010, Systematic Notes On The Genus Claassenia Wu (Plecoptera: Perlidae), With Description Of A New Species, pp. 303-314 in Illiesia 6 (24)</i> on pages 303-305, DOI: 10.5281/zenodo.4753177