Austrotinodes bifurcatus, DI Cartwright, 2009

Cartwright, David I., 2009, Austrotinodes Schmid, a South and Central American caddisfly genus, newly recorded in Australia, with the description of new species (Trichoptera: Ecnomidae), Zootaxa 2142 (1), pp. 1-19 : 7

Austrotinodes bifurcatus sp. nov.

Figs 8–10

Diagnosis. This species is grouped with Austrotinodes varus and A. doota , with the shared character of forked superior appendages, or with long baso-ventral process. It is distinguished by fused or joined wing-like extensions on the inferior appendages.

Description. Head, body and wings brown; wings similar to A. varus ( Fig. 4 ). Forewing length about 3.2–3.3 times width: male 5.4 mm. Forewing fork 2 long with footstalk, footstalk about 1.5 times length of cross-vein r-m, length fork about 0.9 times length fork 3; fork 3 length about 3.6 times length footstalk, footstalk length about 1.6 times length cross-vein m. Hindwing length about 3.2 times width, fork 2 with short footstalk, length about 1.1–1.3 times length cross-vein r-m, fork 2 about same length as fork 3.

Male. Tergum X membranous ( Fig. 10 ). Superior appendages in lateral view, forked, with larger apically directed fork and smaller, more slender, ventral branch and with a pair of curved, dorsally directed processes basally ( Fig. 8 ); in dorsal view, length about 3 times width, apices slightly incurved ( Fig. 10 ). Phallus generally tube-like, ventrally broadened subapically, with an embedded bifid spine; with a single sword-like process (phallic guide) arising from near the base of the inferior appendages ( Fig. 8 ). Inferior appendages with fused or joined dorso-lateral wing-like extensions, dorso-ventrally flattened; in ventral view, length about two-thirds width, broadest and rounded laterally near the middle, narrowed subapically, with rounded apex ( Fig. 9 ); in lateral view, lateral projections slightly dorsally directed, broadest near the middle ( Fig. 8 ).

Female. Unknown.

Holotype male (specimen CT-232 figured); Queensland, Bellenden Ker Range, Cable tower 3 (about 17°16'S, 145°53'E), 1054m, 25–31 Oct 1981, Earthwatch/ QM ( NMV, T- 20358).

Etymology. Bifurcatus - Latin, forked (superior appendages).

Remarks. Only one specimen of Austrotinodes bifurcatus has been recorded from the type locality in north-eastern Queensland (latitude 17°16'S).

Figures

FIGURES 8–15. Austrotinodes spp. 8–10: Austrotinodes bifurcatus sp. nov. male genitalia in lateral, ventral and dorsal views. 11–13: Austrotinodes theischingeri sp. nov. male genitalia in lateral, ventral and dorsal views. 14–15: Austrotinodes yalga sp. nov. 14: Forewing and hindwing. 15: Head and thorax, dorsal view.

FIGURES 1–7. Austrotinodes spp. 1–3: Austrotinodes doota sp. nov. male genitalia in lateral, ventral and dorsal views. 4–7: Austrotinodes varus sp. nov. 4: Wings, section of forewing and hindwing. 5–7: Male genitalia in lateral, ventral and dorsal views. i.a., inferior appendage(s); p.g., phallic guide; pha., phallus; s.a., superior appendage.