New and newly recorded micro-caddisfly species (Insecta: Trichoptera: Hydroptilidae) from Australia’s north, including islands of Torres Strait Author Wells, Alice Author Dostine, Peter text Zootaxa 2016 4127 3 591 600 journal article 38720 10.11646/zootaxa.4127.3.11 9a4e6f2f-055d-4dae-ad2f-af5e35b9e772 1175-5326 255937 214DF7EA-3BE3-47E3-92A9-D0AF24ACB4CB Hellyethira khukri sp. nov. Figures 12, 13 Diagnosis. This species is closely similar to the northern Australian species Hellyethira forficata Wells , H. radonensis Wells , and H. veruta Wells , but is recognised by the tightly twisted apical spine on the phallic apparatus; the stout, sclerotised, undivided dorsal lobe on the gonopods compared with the more slender structures in H. radonensis , and the apically divided structures in H. forficata . Description. Male . Length of each forewing 2.1 mm (n = 2). Antennae each with 33–34 flagellomeres, flagellomeres rectangular in profile, bearing large sensilla placodea. Meso-ventral process on abdominal segment VII slender, elongate. Genitalia as in Figs 11, 12 . Abdominal segment IX quadrate in ventral view; dorsal plate broad, membranous, fimbriate apically; gonopods multilobed, ventralmost lobe broad throughout length, setose, dorsal process in form of pair of stout, sclerotised forceps-like lobes, with pair of slender membranous lobes farther above them, each bearing slender apical seta; parameres curved, convergent in ventral view almost to slightly hooked apices, basally each with stout parallel apodeme; phallic apparatus terminating in a tightly twisted spine, membranous collar subapically. Female . Unknown. Types . Holotype . male, NORTHERN TERRITORY, Petherick’s Rainforest Reserve, 6–7.vi.2015 , J. Schult, light trap (NTM). Paratype . 1 male , data as for holotype (ANIC). Etymology. " Khukri ," the term for a Gurkha knife, being descriptive of the blade-like twist terminally on the phallic apparatus.