Hydrobiosella tiarka, Cartwright, 2012

Cartwright, David I., 2012, Two further species groups and new species among Australian Hydrobiosella Tillyard: new species from south-eastern Australia (Trichoptera: Philopotamidae), Memoirs of Museum Victoria 69, pp. 245-258 : 252-253

publication ID	https://doi.org/ 10.24199/j.mmv.2012.69.03
DOI	https://doi.org/10.5281/zenodo.10666166
persistent identifier	https://treatment.plazi.org/id/AF02CC77-974B-0B49-E0BD-FA5591933277
treatment provided by	Felipe
scientific name	Hydrobiosella tiarka
status	sp. nov.

Treatment

Hydrobiosella tiarka sp. nov.

Figures 5–7 View Figures 1–7 , 39 View Figures 38–43

Holotype. Male. Victoria. Cement Ck nr Warburton (about 37°43'S, 145°43'E), 8 Dec. 1970, A. Neboiss ( NMV, T-21407). GoogleMaps

Paratypes. Victoria. 7 males, collected with holotype GoogleMaps ; 4 males (specimen PT-584 figured), same loc. and coll., 27 Mar 1972; 1 male, same loc., 29 Sep 1990, B. Armitage; 1 male, Cement Ck, 5 Feb 1955, A. Neboiss; 1 male, same loc. and coll., 19 Nov 1955; 1 female (specimen CT-614 figured), Cement Ck, Mt Donna Buang , 8 Apr 1976 , Cartwright; 1 male, same loc. and coll., 1 Dec 1976 ( NMV) .

Other material examined. Victoria. 3 males, Cement Ck Mt Donna Buang-Warburton Rd , 23 Feb 2012 , D. Cartwright; 1 male, Erica, 29 Jan 1960, A. Neboiss; 1 male, 1 female, Toorongo Falls , NE Noojee, 17 Dec 1970 , A. Neboiss; 1 male, Brittania Ck, 6km S of Warburton , 27 Feb 1976 , A. Neboiss; 3 males, 1 female, Ada R. on Ada River Rd, 37°50.8'S 145°52'E, 19 Jan 1979 GoogleMaps , Latrobe C Survey ; 1 male, same loc. and coll., 10 Feb 1980 ( NMV) .

Diagnosis. Males of Hydrobiosella tiarka can be separated from those of other species in the group by the small apical spine and slightly bulbous apex on segment X.

Description. Wings similar to those of H. bandabanda ( Fig. 1 View Figures 1–7 ); length of forewing, male 6.7–9.8 mm; female 8.2–10.8 mm.

Male. Segment IX with a shallow, wide V-shaped notch medially on distal margin ( Fig. 7 View Figures 1–7 ). Segment X in dorsal view, a ‘tongue-shaped’ process, with almost parallel sides in basal half, with a pair of very small knobs meso-laterally, tapered strongly distally to a small apical, slightly bulbous knob, length about 2.9 times width, without a central dorsal ridge or groove ( Fig. 5 View Figures 1–7 ); in lateral view broad-based, narrowed at basal third, slender with almost parallel sides in distal two thirds, with short apical spine ( Fig. 6 View Figures 1–7 ). Phallus generally tube-like, robust, with a pair of slightly divergent sub-apical spines ( Figs 5, 6 View Figures 1–7 ). Inferior appendages in lateral view, slender, with basal segment sub-rectangular, length about 2.8 times maximum width; harpago shorter, length about half length basal segment, length about 2.1 times maximum width, with broad rounded apex ( Fig. 6 View Figures 1–7 ).

Female. Genitalia typical of genus, with a small projection on sternite IX meso-distally ( Fig. 39 View Figures 38–43 ).

Etymology. Tiarka – Australian Aboriginal word for toothpick or sharp (apical spine on tergum X).

Remarks. Twenty-six male and three female specimens of Hydrobiosella tiarka have been collected from six localities in eastern-central Victoria (latitudinal range 37°43'- 37°58' S).