Daternomina hamata, 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 : 23-25

Daternomina hamata sp. nov.

Figures 43–45

Diagnosis. Daternomina hamata is separated from others in the genus by the combination of the inferior appendages which are fused and have relatively angular sides and a shallow notch distally, the superior appendages with crenulated margins, plus the distinctive hook-like processes dorsal to the phallus.

Description. Head, body and wings light brown; wings similar to D. irrorata ( Fig. 1 ) except fork 2 nygma absent. Forewing length about 3 times width: male 4.1–4.4 mm. Forewing fork 2 relatively long, sessile, about 1.3 times length of fork 3; fork 3 relatively long with short footstalk, length fork 3 greater than 10 times length footstalk, footstalk about 0.6 times length cross-vein m; r-m and m separated at fork 3 by about 1.5 times length of cross-vein m; fork 4 shorter than fork 3; fork 5 long, about 1.8 times length of fork 4. Hindwing length about 3 times width, fork 2 sessile, length about 1.6 times length of fork 3.

Male. Tergum X membranous, short ( Fig. 45 ). Superior appendages in lateral view, slightly bulbous, length about twice width, with crenulated margin ( Fig. 43 ); in dorsal view, relatively slender, length about 3.5 times width, with row of small projections, each with apical spiny setae on mesal margin ( Fig. 45 ). Phallus generally tube-like, narrowed subapically, with a pair of long processes laterally and a pair of hooked processes dorsally; with a pair of curved processes (phallic guides) arising from near the base of the inferior appendages ( Fig. 43 ). Inferior appendages dorso-ventrally flattened; in ventral view, length about same as width, fused in basal two-thirds, angular lateral margins, distal one-third separated narrowly by a mesal split ( Fig. 44 ); in lateral view, robust, length about 2.5 times width, tapered slightly distally ( Fig. 43 ).

Female. Unknown.

Holotype male: New South Wales, Nungatta Ck, Yambula State Forest (about 37°07'33''S, 149°29'16''E), 16-17 Feb 2000, J. Miller ( NMV, T-19585).

Paratypes: New South Wales. 1 male, collected with holotype ; 1 male, Trib. of Nungatta Ck, Yambula State Forest , 37°07'33''S, 149°29'16''E, 23 Feb 1998, J. Miller ; 1 male (specimen CT-521 figured), Clyde Mt nr Braidwood , 28 Dec 1975, M.S. Moulds ( NMV) .

Etymology. Hamata - Latin word meaning provided with hooks, hooked (processes dorsal to phallus).

Remarks. Only four male specimens of Daternomina hamata have been collected from three localities in south-eastern New South Wales (latitudinal range 35°33'- 37°07'S).

Figures

FIGURES 40–45. Daternomina spp. Male genitalia in lateral, ventral and dorsal views. 40–42: Daternomina warrook sp. nov. 43–45: Daternomina hamata 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.