Daternomina trulla (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 : 16-17

Daternomina trulla (Neboiss) comb. nov.

Figures 22–24

Ecnomina trulla Neboiss, 1982: 295 , figs 54–56. — Neboiss 1986: 156.

Diagnosis. Daternomina trulla resembles D. ulltra in possessing rounded apices on the superior appendages and inferior appendages which are short, fused basally and curved laterally, but differs in having a relatively shallow notch distally, dividing at most the distal quarter and a weakly down curved phallic guide.

Description. (Revised after Neboiss 1982). Head, body and wings brown; wings similar to D. irrorata ( Fig. 1 ). Forewing length about 3 times width: male 4.0– 4.4 mm. Forewing fork 2 relatively long, sessile, length about 1.7–2.0 times length of fork 3, nygma present; fork 3 relatively long, length about 1.8–2.7 times length footstalk, footstalk length about 1.4–2.3 times length cross-vein m; r-m and m displaced at fork 3 by about 1.7–1.8 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 with short footstalk, length footstalk 0.9–1.2 times length cross-vein r-m, fork 2 length about 1.4–1.7 times length of fork 3.

Male. Tergum X membranous ( Fig. 24 ). Superior appendages slightly laterally compressed; in lateral view, broad, length about 2.5 times width ( Fig. 22 ); in dorsal view, length about 3.5 times width, with two groups of spines on inner surface ( Fig. 24 ). Phallus generally tube-like with a pair of elongate processes dorsally; with a single relatively long and slender, curved process (phallic guide) arising from near the base of the inferior appendages ( Fig. 22 ). Inferior appendages strongly dorso-ventrally compressed; in ventral view, fused, robust, rounded sided, with a short, narrow V-shaped notch distally ( Fig. 23 ); in lateral view, relatively straight ( Fig. 22 ).

Female. Unknown.

Material examined: Western Australia. Holotype male, Napier Creek , 22 km NE of Albany, 29 Nov 1978 , A.N. ( NMV, T- 6242, specimen PT-628 figured). Other material. 1 male, Seldom Seen Brook, Jarrahdale, Stn 7, 2 Mar 1983 , S. Bunn; 1 male, same locality and collector, 6 Jan 1984 ; 1 male, same locality and collector, 8 Feb 1984 .

Remarks. Four male specimens of Daternomina trulla have been collected from two sites in southern Western Australia (latitudinal range 31°14'- 34°50'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.

Figures

FIGURES 19–24. Daternomina spp. Male genitalia in lateral, ventral and dorsal views. 19–21: Daternomina ulltra sp. nov. 22–24: Daternomina trulla (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.