Ecnomina mesembria Neboiss

Cartwright, David I., 2008, A review of the Australian species of Ecnomina Kimmins and Daternomina Neboiss (Trichoptera: Ecnomidae), Zootaxa 1774 (1), pp. 1-76 : 49

publication ID	https://doi.org/ 10.11646/zootaxa.1774.1.1
DOI	https://doi.org/10.5281/zenodo.5124201
persistent identifier	https://treatment.plazi.org/id/0749822F-FFDB-6009-6AE7-CBBACB1BAFA4
treatment provided by	Felipe
scientific name	Ecnomina mesembria Neboiss
status

Treatment

Ecnomina mesembria Neboiss View in CoL

Figs 102–104 View FIGURES 99–107 , 180 View FIGURES 175–183

Ecnomina mesembria Neboiss, 1982: 293 View in CoL , figs 29–31, 40, 41, 47. — Neboiss 1986: 156.

Diagnosis. Ecnomina mesembria can be distinguished by the greatly dilated superior appendages, basally with two small ventral processes with apical hairs.

Description. (Revised after Neboiss 1982). Head, body and wings brown, abdomen paler ventrally; wings (fig. 47, Neboiss 1982) similar to E. legula ( Fig. 3 View FIGURES 1–6 ). Forewing length about 3.1–3.3 times width: male 4.1 mm, female 3.9–4.3 mm. Forewing fork 2 relatively long, sessile, length about 1.0–1.1 times length of fork 3; fork 3 relatively long, sessile or with short footstalk, length fork greater than 10 times length footstalk, footstalk length about 0–0.7 times length cross-vein m, r-m and m not contiguous at fork 3 by about 0.5–0.8 times length cross-vein m; fork 4 shorter than fork 3; fork 5 length about 1.8 times length of fork 4. Hindwing length about 2.9 times width, fork 2 sessile or with short footstalk, fork length about 0.9–1.0 times length of fork 3.

Male. Tergum X membranous, short, bifurcate apically ( Fig. 104 View FIGURES 99–107 ). Superior appendages in lateral view, very broad in distal half, length about 1.7 times width, with a two short ventral projections armed with short spiny hairs apically ( Figs 102, 103 View FIGURES 99–107 ); in dorsal view, length about 4 times width, with short subapical projection on mesal surface ( Fig. 104 View FIGURES 99–107 ). Phallus generally tube-like, slightly bifid distally; with a single, down curved process (phallic guide) arising from near the base of the inferior appendages ( Fig. 102 View FIGURES 99–107 ). Inferior appendages in ventral view, fused in basal half, with disto-mesal split narrowly dividing pair of rounded lobes ( Fig. 103 View FIGURES 99–107 ); in lateral view, broad basally, tapered distally ( Fig. 102 View FIGURES 99–107 ).

Female. Genitalia with a single elongate and slender mesal process on sternite VIII, process very slightly dilated distally; segment IX relatively long, tapered slightly distally, segment X relatively short and segments IX and X relatively slender and with several pairs of hairs ( Fig. 180 View FIGURES 175–183 ).

Material examined: Western Australia. Holotype male (specimen PT-708 figured), Beedelup Falls near Pemberton, 8 Dec 1979, J.B. ( NMV, T- 6243). Paratypes, 4 females (specimen PT-726 figured), collected with holotype ( NMV). Other material. 2 females, Ellen Brook Falls, 10 km NW of Margaret River, 4 Dec 1979, J. Blyth; 1 female, Harvey River nr Harvey Falls , 21 Nov 1978, A.N.; 2 females, Canterbury Brook, 16 km E of Northcliffe, 29 Dec 1979, J. Blyth .

Remarks. Ecnomina mesembria is recorded from only one male and nine female specimens collected from four sites in south-western Australia (latitudinal range 32°46' - 34°25'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 Ecnomina genitalic and wing structures.