Ecnomina incisura, 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 : 36-38

Ecnomina incisura sp. nov.

Figs 72–74

Diagnosis. Ecnomina incisura is most similar to E. specensis from which it can be separated by the slightly narrower, fused inferior appendages and small details in the shape of the superior appendages.

Description. Head, body and wings light brown; wings similar to E. scutica ( Fig. 5 ) and E. legula ( Fig. 3 ). Forewing length about 2.8 times width: male 4.8–5.1 mm. Forewing fork 2 relatively long, sessile or with short footstalk, length footstalk up to 0.4 times length cross-vein m, nygma present, length fork 2 about 1.1– 1.2 times length of fork 3; fork 3 relatively long, sessile, r-m and m not contiguous at fork 3 by about 2.7–3.2 times length cross-vein m; fork 4 similar length to fork 3; fork 5 long, length about 1.8 times length of fork 4. Hindwing length about 2.6 times width, fork 2 with short footstalk, length footstalk 0.4–0.6 times length cross-vein m, fork 2 length about 1.2 times length of fork 3.

Male. Tergum X membranous with a pair of triangular lobes distally, separated by a wide mesal split ( Fig. 74 ). Superior appendages with base displaced ventrally; in lateral view, narrowed basally, dilated and sub quadrate distally, with a small hooked process meso-distally ( Figs 72–74 ). Phallus generally tube-like; with a single, robust, bifid process (phallic guide) arising from near the base of the inferior appendages ( Fig. 72 ). Inferior appendages strongly dorso-ventrally compressed; in ventral view, fused, broad, sub quadrate, length about 0.5 times width, with a small central notch distally ( Fig. 73 ); in lateral view, robust, rounded distally ( Fig. 72 ).

Female. Unknown.

Holotype male: Victoria, Myrtleford (about 36°34'S, 146°44'E), 11 Jan 1955, A. Neboiss ( NMV, T- 19670) . Paratypes. Victoria. 1 male, (specimen CT-450 figured), Mitta Mitta, 4 Feb 1961, E. Matheson; 1 male, Nariel, 26 March 1963, E.M. ( NMV). Etymology. Incisura - Latin word for notch (inferior appendages). Remarks. Ecnomina incisura has been collected from three localities in north-eastern Victoria (latitudinal range 36°27' - 36°34'S) .

Figures

FIGURES 69–74. Ecnomina spp Male genitalia in lateral, ventral and dorsal views. 69–71: Ecnomina specensis sp. nov. 72–74: Ecnomina incisura sp. nov.

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.