Daternomina quasitrulla 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 : 19

Daternomina quasitrulla Neboiss

Figures 28–30

Daternomina quasitrulla Neboiss, 2003: 66 , figs 16G, H.

Diagnosis. Daternomina quasitrulla can be distinguished from all other Daternomina species by having relatively short, fused inferior appendages, with a relatively shallow, wide notch apically, dividing at most the distal third and superior appendages which are rounded distally.

Description. (Revised after Neboiss 2003). Head, body and wings brown; wings similar to D. irrorata ( Fig. 1 ). Forewing length about 3.1 times width: male 5.0 mm. Forewing fork 2 relatively long, sessile, length about 1.7–1.8 times length of fork 3, nygma present; fork 3 relatively long, length about 2.1–2.2 times length footstalk, footstalk length about 1.7–1.8 times length cross-vein m; r-m and m displaced at fork 3 by about 1.9–2.0 times length cross-vein m; fork 4 length similar to fork 3; fork 5 long, length about 1.8 times length of fork 4. Hindwing length about 3 times width; fork 2 sessile, length about 1.7–1.9 times length of fork 3.

Male. Tergum X membranous with a pair of small mesal processes ( Fig. 30 ). Superior appendages strongly laterally compressed; in lateral view, broad, rounded distally, length about 2.5 times width ( Fig. 28 ); in dorsal view, relatively slender, length about 4 times width, with a group of spines on inner surface ( Fig. 30 ). Phallus generally tube-like, with a pair of small spines apically; with a single robust, curved process (phallic guide) arising from near the base of the inferior appendages ( Fig. 28 ). Inferior appendages strongly dorsoventrally compressed, small; in ventral view, fused, short, broad, with a shallow, wide V-shaped notch distally ( Fig. 29 ); in lateral view, short, slightly curved ( Fig. 28 ).

Female. Unknown.

Material examined: Holotype male, Tasmania, Fortescue Bay, 43°08'S 147°57'E, Tasman Peninsula , Malaise trap, 7–9 Feb 1989, D. Bickle ( NMV, specimen PT-1834 figured).

Remarks. A single male specimen of Daternomina quasitrulla has been collected from the type locality in south-eastern Tasmania (latitude 43°08'S). Neboiss’s (2003) 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.

Figures

FIGURES 25–30. Daternomina spp. Male genitalia in lateral, ventral and dorsal views. 25–27: Daternomina loowa sp. nov. 28–30: Daternomina quasitrulla Neboiss.

FIGURES 1–6. 1–2. Daternomina irrorata (Kimmins). 1: Forewing and hindwing. 2: Head and thorax, dorsal view. 3– 6. Ecnomina spp. 3. Ecnomina legula Neboiss, forewing and hindwing. 4–5. Ecnomina scutica sp. nov. 4: Head and thorax, dorsal view. 5: Wings, section of forewing and hindwing. 6. Ecnomina spinosa Kimmins, head and thorax, dorsal view. n., nygma; o.w, occipital wart.