Hydrobiosella moorda, Cartwright, 2010

Cartwright, David I., 2010, Studies of Australian Hydrobiosella Tillyard: a review of the Australian species of the Hydrobiosella bispina Kimmins group (Trichoptera: Philopotamidae), Memoirs of Museum Victoria 67, pp. 1-13 : 9-11

Hydrobiosella moorda sp. nov.

Figures 26–28

Holotype. Male, New South Wales, (about 33°41'S, 150°17'E), Pulpit Hill Ck, Megalong Valley , 8 Oct 1985, A. Neboiss ( NMV, T-20938).

Paratypes. New South Wales. 2 males (specimen PT-1421 figured), collected with holotype ( NMV) .

Diagnosis. Hydrobiosella moorda can be separated from other species in the group by the combination of segment X in dorsal view with a robust, gradually tapered apex, not constricted subapically, and the ventral margin of the harpago sharply angled at about 90 degrees near middle with apex pointing posteriorly.

Description. Wings similar to those of H.arcuata (fig. 1), length of forewing: male 8.0– 8.8 mm. Forewing fork 2 long, length fork 2 about 1.5 times length of fork 1; length fork 3 about 1.5 times length footstalk; fork 4 length about 5.3 times length footstalk. Hind wing fork 1 sessile; fork 3 length about 1.3–1.4 times length of footstalk.

Male. Segment IX with a small shallow notch medially on distal margin (fig. 28). Segment X with a robust mesal lobe, with a pair of short hairs/bristles subapically, in lateral view not downturned distally (fig. 27); in dorsal view, tapered slightly distally, not narrowed subapically (fig. 26); with a pair of more pigmented lateral lobes that end in small, slightly downward and outward projecting hooks (figs 26–27). Inferior appendages in lateral view, with basal segment length about 1.9 times maximum width, broadest near middle, rounded distally; harpago more slender, ventral margin sharply angled at about 90 degrees near middle (fig. 27).

Female. Unknown.

Etymology. Moorda — Australian Aboriginal word for ‘blue mountain’ (type locality — Blue Mountains).

Remarks. Three male specimens of Hydrobiosella moorda have been collected from the type locality in central-eastern New South Wales (latitude 33°41'S).

Figures

Figures 26–34. Hydrobiosella spp. male genitalia in dorsal, lateral and part ventral views; 26–28, Hydrobiosella moorda sp. nov.; 26, dorsal; 27, lateral; 28, ventral, mesodistal margin of segment IX; 29–31, Hydrobiosella woonoongoora sp. nov.; 29, dorsal; 30, lateral; 31, ventral, mesodistal margin of segment IX; 32–34, Hydrobiosella thurawal sp. nov.; 32, dorsal; 33, lateral; 34, ventral, mesodistal margin of segment IX.