Ecnomina concava, 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: 68

publication ID 10.11646/zootaxa.1774.1.1


persistent identifier

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scientific name

Ecnomina concava

sp. nov.

Ecnomina concava   sp. nov.

Figs 159–161 View FIGURES 153–161 , 192 View FIGURES 184–195

Diagnosis. Ecnomina concava   closely resembles other species in the group and it is distinguished by tergum X with a pair of processes which are sub triangular, reaching half the length of the superior appendages and the inferior appendages with slightly elongate meso-distal excision.

Description. Head, body and wings light brown to fawn, abdomen paler ventrally; wings similar to E. merki   ( Fig. 172 View FIGURES 168–174 ). Forewing length about 2.9–3.1 times width: male 2.6–2.8 mm, female 2.7 mm. Forewing fork 2 relatively long, with short footstalk, length footstalk about 0.2–0.8 times length cross-vein r-m, length fork about 1.3–1.7 times length of fork 3; fork 3 relatively short, with long footstalk, length fork about 1.6–2.4 times length footstalk, footstalk length about 1.9–2.2 times length cross-vein m, r-m and m nearly contiguous at footstalk fork 3, r-m and m separated by about 0–1.0 times length of cross-vein m; fork 4 slightly shorter than fork 3; fork 5 long, length about twice length of fork 4. Hindwing length about 2.9 times width, fork 2 with short footstalk, length footstalk about 0.6–0.7 times length cross-vein r-m, fork length about 1.4–1.6 times length of fork 3.

Male Tergum X membranous, with one pair of relatively long, sub triangular, robust dorsal processes, narrowly separated, slightly crenulated meso-distally ( Fig. 161 View FIGURES 153–161 ). Superior appendages in lateral view, length about 3.5 times width ( Fig. 159 View FIGURES 153–161 ); in dorsal view, length about 3 times width, dilated slightly and with several spines distally ( Fig. 161 View FIGURES 153–161 ). Phallus simple, tube-like, slender ( Fig. 159 View FIGURES 153–161 ). Inferior appendages short; in ventral view, fused in basal third, dilated and truncated distally, with elongate ovoid excision meso-distally, length about two thirds width ( Fig. 160 View FIGURES 153–161 ); in lateral view, dilated slightly distally, length about 2.5 times width ( Fig. 159 View FIGURES 153–161 ).

Female. Genitalia with a single short, broadbased, slender digitiform mesal process on sternite VIII; segment IX relatively long, tapered slightly distally, segment X relatively short and segments IX and X relatively slender ( Fig. 192 View FIGURES 184–195 ).

Holotype male: Northern Territory, SAR, Rock Hole Ck (about 13°29'S, 132°30'E), lt tr., Nov 1988, P. Dostine ( NMV, T-19865). GoogleMaps  

Paratypes: Northern Territory. 3 males (specimen CT-513 figured), collected with holotype GoogleMaps   ; 1 female (specimen CT-517 figured), ARRS Radon Springs, 12°45'S, 132°55'E, 2 V lt tr., 13–14 Apr 1989, P. Suter and A.W. ( NMV) GoogleMaps   .

Etymology. Concava - Latin word for hollow, concave (inferior appendages).

Remarks. Four males of Ecnomina concava   have been collected from the two localities in the South Alligator River Region of the Northern Territory (latitudinal range 12°45' - 13°29'S).


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