Daternomina ikathan Cartwright 2008, sp. nov.
Creators: name: Cartwright, David I.
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Trichoptera
Ecnomidae
Daternomina
Daternomina ikathan

description: <i>Daternomina ikathan</i> sp. nov. Figs 46–48 Diagnosis. <i>Daternomina ikathan</i> resembles <i>D. scissura</i> and <i>D. bifida</i> in the general shape of the inferior appendages in ventral view, but differs in the following fine detail: the inferior appendages are slightly longer than the superior appendages; in ventral view, the length of the inferior appendages is greater than the width; the meso-distal split separates distal three-fifths; and the phallus has a robust pair of processes situated dorsolaterally. Description. Head, body and wings light brown; wings similar to <i>D. irrorata</i> (Fig. 1) except fork 2 nygma absent. Forewing length about 3.1–3.2 times width: male 3.6–3.7 mm. Forewing fork 2 relatively long, with short footstalk, footstalk about 0.2–1.2 times length cross-vein r-m, length fork 2 about 1.2–1.3 times length of fork 3; fork 3 relatively long, sessile or with short footstalk, fork 3 greater than 5 times length footstalk, footstalk between 0–1.0 times length cross-vein m; r-m and m separated at fork 3 by about 1.6–2.0 times length of cross-vein m; fork 4 shorter than fork 3; fork 5 long, about 1.8 times length of fork 4. Hindwing length about 3.2 times width, fork 2 with short footstalk, footstalk about 0.5–0.7 times length cross-vein r-m, fork 2 about 1.3–1.4 times length of fork 3. Male. Tergum X membranous, short with a mesal V-shaped notch (Fig. 48). Superior appendages laterally compressed; in lateral view robust, length about 2.3 times width, dilated slightly near middle (Fig. 46); in dorsal view, relatively slender, length about 3.5 times width, with a small mesal projection in basal half, and a row of spine-like setae on inner surface (Fig. 48). Phallus tube-like, with pairs of apical, ventral and lateral spines, and a pair of robust processes dorso-laterally; with a single, down curved process (phallic guide) arising from near the base of the inferior appendages (Fig 46). Inferior appendages robust, large, slightly longer than superior appendages, strongly dorso-ventrally flattened; in ventral view, length about 1.2 times width, fused in basal third forming a single plate, distal three-fifths separated narrowly by a deep mesal split, with pair of rounded apices (Fig. 47); in lateral view robust, length about 3 times width, broadest basally, tapered gradually distally (Fig. 46). Female. Unknown. <b>Holotype male</b>: Queensland, Upper Freshwater Ck, Whitfield Range nr Cairns (about 16°57'S, 145°42'E), 15 Dec 1974, M.S. Moulds (NMV, T-19589). <b>Paratypes</b>: Queensland. 1 male (specimen CT-467 figured), same loc. and coll. as holotype, MV light, 24 Aug 1974; 1 male, Carron Ck, Kirrama State Forest, 17°50'S, 145°35'E, Apr 1993, G. Theischinger (NMV). Etymology. <i>Ikathan</i> - north Queensland Aboriginal word for split open (inferior appendages). Remarks. Three males of <i>Ecnomina ikathan</i> are recorded from two sites in north-eastern Queensland (latitudinal range 16°57'- 17°50'S).
description: Published as part of <i>Cartwright, David I., 2008, A review of the Australian species of Ecnomina Kimmins and Daternomina Neboiss (Trichoptera: Ecnomidae), pp. 1-76 in Zootaxa 1774 (1)</i> on page 25, DOI: 10.11646/zootaxa.1774.1.1, http://zenodo.org/record/5124133