Ecnomina trifurcata Kimmins, 1953

Cartwright, David I., 2008, A review of the Australian species of Ecnomina Kimmins and Daternomina Neboiss (Trichoptera: Ecnomidae), Zootaxa 1774 (1), pp. 1-76 : 63-64

publication ID	https://doi.org/ 10.11646/zootaxa.1774.1.1
DOI	https://doi.org/10.5281/zenodo.5124233
persistent identifier	https://treatment.plazi.org/id/0749822F-FFD5-6006-6AE7-CD87CA4AA9AA
treatment provided by	Felipe
scientific name	Ecnomina trifurcata Kimmins, 1953
status

Treatment

Ecnomina trifurcata Kimmins, 1953 View in CoL

Figs 144–146 View FIGURES 144–152

Ecnomina trifurcata Kimmins View in CoL in Mosely and Kimmins, 1953: 382, fig. 263. – Neboiss 1986: 158.

Diagnosis. Ecnomina trifurcata is a distinctive species which is distinguished by the relatively slender superior appendages and the deep V-shaped split in the inferior appendages meso-distally.

Description. Head, body and wings brownish; wings (fig. 263a, Mosely and Kimmins 1953) similar to E. legula ( Fig. 3 View FIGURES 1–6 ). Forewing length about 3.2 times width: male 3.5 mm. Forewing fork 2 relatively long, sessile, length about 1.2 times length of fork 3; fork 3 relatively long, with short footstalk, fork greater than 7 times length footstalk, footstalk length about 0.8 times length cross-vein m, r-m and m nearly contiguous at footstalk fork 3, r-m and m separated by about 0.2 times length of cross-vein m; fork 4 shorter than fork 3; fork 5 long, length about 1.7 times length of fork 4. Hindwing length about 3.5 times width, fork 2 sessile, length about 1.4 times length of fork 3.

Male. (Revised after Kimmins in Mosely and Kimmins 1953). Tergum X membranous, with one pair of relatively slender dorsal processes, fused basally, and with a slightly more elongate ventral pair ( Fig. 146 View FIGURES 144–152 ). Superior appendages slender; in lateral view, narrowed slightly in distal third, length about 6.5 times width ( Fig. 144 View FIGURES 144–152 ); in dorsal view, length about 6 times width, dilated slightly distally ( Fig. 146 View FIGURES 144–152 ). Phallus simple, tubelike, slender, flanged and curved about mid length ( Fig. 144 View FIGURES 144–152 ). Inferior appendages shorter than superior appendages; in ventral view, fused basally, length about 1.4 times width, rounded laterally, with deep Vshaped split meso-distally ( Fig. 145 View FIGURES 144–152 ); in lateral view, robust, length about three times width ( Fig. 144 View FIGURES 144–152 ).

Female. Unknown.

Type material (not seen): Holotype male, New South Wales, Wentworth Park, Wentworth Falls , 24 Nov 1916, R. J. Tillyard. ( BMNH).

Remarks. No new material of this species has been seen or collected since the holotype in 1916. Ecnomina trifurcata appears to be restricted in distribution and probably is rare as only one male has been collected from the type locality (latitude 33°43'S). Kimmins’ (in Mosely and Kimmins 1953) 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.