Daternomina scindens (Neboiss) Cartwright, 2008

Cartwright, David I., 2008, A review of the Australian species of Ecnomina Kimmins and Daternomina Neboiss (Trichoptera: Ecnomidae), Zootaxa 1774 (1), pp. 1-76 : 22-23

publication ID	https://doi.org/ 10.11646/zootaxa.1774.1.1
DOI	https://doi.org/10.5281/zenodo.5124129
persistent identifier	https://treatment.plazi.org/id/0749822F-FFFE-602F-6AE7-CF52CD26A86A
treatment provided by	Felipe
scientific name	Daternomina scindens (Neboiss)
status	comb. nov.

Treatment

Daternomina scindens (Neboiss) comb. nov.

Figures 37–39 View FIGURES 31–39 , 60 View FIGURES 55–62

Ecnomina scindens Neboiss, 1982: 295 View in CoL , figs 44, 45, 50–53. — Neboiss 1986: 155.

Diagnosis. Daternomina scindens resembles D. merga in having relatively long superior and inferior appendages, but differs in having more robust appendages.

Description. (Revised after Neboiss 1982). Head, body and wings brown; wings ( Neboiss 1982, fig. 50; Neboiss 1986: 155) similar to D. irrorata ( Fig. 1 View FIGURES 1–6 ). Forewing length about 3.3 times width: male 4.6–5.0 mm, female 4.5 mm. Forewing fork 2 relatively long, sessile, about 1.6–1.8 times length of fork 3, nygma present; fork 3 about 1.9–2.0 times length footstalk, footstalk length about 2.0–2.5 times length cross-vein m; r-m and m displaced at fork 3 by about 1.2–1.7 times length cross-vein m; fork 4 shorter than fork 3; fork 5 long, about 1.5 times length of fork 4. Hindwing length about 3 times width; fork 2 sessile, length about 1.5–1.8 times length of fork 3.

Male. Tergum X membranous with a pair of lobes ( Fig. 39 View FIGURES 31–39 ). Superior appendages long, laterally compressed; in lateral view robust, sub-rectangular, length about 2.5 times width ( Fig. 37 View FIGURES 31–39 ); in dorsal view, relatively slender, length about 5 times width, with two rows of spines on inner surface ( Fig. 39 View FIGURES 31–39 ). Phallus simple, tube-like, with a pair of robust, hook-like processes dorso-laterally; with a single, slender, elongate, curved sword-like process (phallic guide) arising from near the base of the inferior appendages ( Fig. 37 View FIGURES 31–39 ). Inferior appendages long, dorso-ventrally flattened; in ventral view fused basally to form a single plate, distal twothirds separated narrowly by a deep mesal split, with pair of digitiform apices ( Fig. 38 View FIGURES 31–39 ); in lateral view robust, length about 2.5 times width, narrowed at distal third ( Fig. 37 View FIGURES 31–39 ).

Female. Genitalia with a pair of large relatively narrowly separated ‘tongue-shaped’ lobes on sternite VIII ( Fig. 60 View FIGURES 55–62 ).

Material examined: Western Australia. Holotype male, Harvey River near Harvey Falls, 15 km E of Harvey, 21 Nov 1978, A.N. (NMV, T- 6332). Paratypes, 5 males (specimen PT-626 figured), 25 females (specimen PT-724 figured), collected with holotype ( NMV). Other material . 1 male, 4 females, Harvey R., below Harvey Falls, 15 Nov 1980, A. Wells and M. Brock ; 1 female, 24 km NW of Walpole , 15 Nov 1958, E.F. Riek ( ANIC) ; 1 male, Frankland R., circular pool, 6 km NE of Walpole, 27, Nov 1978, A.N .; 3 males, 1 female, Beedelup Falls , 16 km W of Pemberton, 13 Nov 1958, E.F. Riek ( ANIC) ; 1 male, Augustus R., Collie, 30 Oct 1983, S. Bunn .

Remarks. Daternomina scindens is recorded from five sites in south-western Australia (latitudinal range 32°46' - 34°57'S). Neboiss’s (1982) figures have been redrawn to allow direct comparisons and to accompany the description that is revised in light of new interpretations of Daternomina genitalic structures.