Daternomina genoaensis, 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 : 13

Daternomina genoaensis sp. nov.

Figures 13–15

Diagnosis. Daternomina genoaensis can be distinguished from all other Daternomina species by having short, mesally divided inferior appendages which in lateral view are not upturned distally.

Description. Head, body and wings brown; wings similar to D. irrorata ( Fig. 1 ). Forewing length about 3 times width: male 4.8 mm. Forewing fork 2 relatively long, sessile, about twice length of fork 3, nygma present; fork 3 relatively long, length about twice length footstalk, footstalk fork 3 length about 2.2 times length cross-vein m; r-m and m displaced at fork 3 by about 1.5 times length cross-vein m; fork 4 length similar to fork 3; fork 5 long, about 1.8 times length of fork 4. Hindwing length about 3 times width, fork 2 sessile, length about twice length of fork 3.

Male. Tergum X membranous with a pair of triangular lobes ( Fig. 15 ). Superior appendages strongly laterally compressed; in lateral view, broad, widened slightly distally, length about 1.5 times width ( Fig. 13 ); in dorsal view, relatively slender, length about 4.5 times width, with a triangular subapical projection and a group of spine-like setae on inner surface ( Fig. 15 ). Phallus generally tube-like, laterally compressed, with a pair of small spines apically; with a pair of slender, curved processes (phallic guides) arising from near the base of the inferior appendages ( Fig. 13 ). Inferior appendages short, robust; in ventral view, paired, fused basally, separated narrowly by a mesal split ( Fig. 14 ); in lateral view not upturned distally ( Fig. 13 ).

Female. Unknown.

Holotype male: (specimen CT-525 figured), Victoria, Genoa Ck, 4 km W of Genoa (about 37°28'S, 149°34'E), UV lt, 8 Dec 2003, D. Cartwright ( NMV, T-19564).

Other material examined: Victoria. 1 male, Yarra R., Reefton Rd, 1 Dec 2005, D. Cartwright .

Etymology. Named after the Genoa Creek (type locality).

Remarks. Two male specimens of Daternomina genoaensis have been collected from widely separated localities in eastern Victoria (latitudinal range 37°28'- 37°41'S).

Figures

FIGURES 13–18. Daternomina spp. Male genitalia in lateral, ventral and dorsal views. 13–15: Daternomina genoaensis sp. nov. 16–18: Daternomina alicewellsae 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.