Hydrobiosella bandabanda, 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 : 246-247

publication ID	https://doi.org/ 10.24199/j.mmv.2012.69.03
DOI	https://doi.org/10.5281/zenodo.10666164
persistent identifier	https://treatment.plazi.org/id/AF02CC77-974D-0B43-E31F-FA2896E836BA
treatment provided by	Felipe
scientific name	Hydrobiosella bandabanda
status

Treatment

Hydrobiosella bandabanda group

Diagnosis. Key characters of males in the group are phallus without parameres but with two or more embedded spines subapically and preanal appendages absent.

Description. Head and nota dorsally brown to dark brown with pale setal warts and scutellum, abdomen brownish dorsally and ventrally, paler laterally; wings light brown to brown. Medium-sized adults. Forewing length about 2.8–3.1 times maximum width, males: 5.9–9.8 mm; females: 6.1–10.8 mm; wing venation ( Fig. 1 View Figures 1–7 ), similar to the type species H. stenocerca ( Mosely and Kimmins 1953, fig. 265a), H. bispina ( Cartwright, 2010, fig. 1) and H. waddama ( Mosely and Kimmins 1953, fig. 269a), R1 simple, forks 1, 2, 3, 4 and 5 present; forks 1 and 2 sessile; fork 2 with nygma present, length about 1.3–1.4 times length fork 1; fork 3 shorter, length 0.7 times length fork 2, fork 3 length ranging from between 1.8–1.9 times length footstalk, cross-veins r-m and m contiguous at fork 3; fork 4 similar length to fork 3, fork length about 7 times length footstalk; fork 5 very long, length between 1.6–1.7 times length fork 4; discoidal cell closed, length between 3.7–3.8 times maximum width. Hind wing length about 2.4–2.5 times maximum width; forks 1, 2, 3 and 5 present; forks 1 and 2 sessile; fork 2 with nygma, length fork 2 between 1.4–1.5 times length fork 1; fork 3 shorter, length about 0.6 times length fork 2, fork 3 slightly longer than footstalk, length fork ranging between 1.3–1.4 times length footstalk; fork 5 very long, length between 1.8–1.9 times length fork 3; discoidal cell closed, length between 4.0–4.1 times maximum width; with three longer anal veins ( Fig. 1 View Figures 1–7 ).

Male. Segment IX with a shallow, wide V notch medially on distal margin ( Figs 4, 7 View Figures 1–7 , 10 View Figures 8–16 ). Preanal appendages absent. Segment X mainly sclerotised, dorso-ventrally compressed; in dorsal view, with a ‘tongue-shaped’ process, tapered distally, rows of fine hairs meso-laterally and usually a pair of small knobs baso-laterally ( Figs 2, 5 View Figures 1–7 ). Phallus generally robust, tube-like, with a pair of spines sub-apically, sometimes with one or two spines more basally ( Figs 2, 3, 5, 6 View Figures 1–7 ). Inferior appendages with two segments, in lateral view, basal segment usually more robust and longer than harpago. Harpago has a small field of dark spines meso-distally ( Figs 3, 6 View Figures 1–7 ).

Female. Genitalia typical of genus with a small projection on sternite IX mesodistally ( Figs 38-41 View Figures 38–43 ).

Larva. Confirmed larvae are known for H. bandabanda . These larvae match Hydrobiosella sp. AV2 ( Cartwright, 1997). The diagnostic features are head wide and angular laterally, and forecoxa with two sclerotised processes on anterior margin, one longer than the other ( Cartwright, 1997, fig. 1.3). Hydrobiosella sp. AV 2 larvae are recorded mainly from riffle habitats of very small to medium-sized streams between 0.4-8 m wide at moderate to high altitudes between 800-1460 m ( Suter et al. 2006).

Key to males of species of the Hydrobiosella bandabanda group from Australia

1. Segment X dorsally with a central ridge bearing pair of acute lateral processes ( Figs 2, 2a View Figures 1–7 ); EC-Vic H. bandabanda

- Segment X without a central dorsal ridge ( Figs 5 View Figures 1–7 , 8 View Figures 8–16 ) 2

2. Segment X with sub-apical spine ( Fig. 6 View Figures 1–7 ); E-Vic H. tiarka

- Segment X without apical spine ( Figs 9, 12 View Figures 8–16 ) 3

3. Segment X in lateral view with apical half slender, not dilated apically; inferior appendages with terminal segment dilated slightly in apical half ( Fig. 9 View Figures 8–16 ); NE-Vic H. tarrong

- Segment X in lateral view with apical half robust, dilated apically; inferior appendages with terminal segment not dilated in apical half ( Figs 12, 15 View Figures 8–16 ) 4

4. Segment X with a dorsal ‘bump’ subapically ( Fig. 12 View Figures 8–16 ); NE-Vic H. jibboor

- Segment X without a dorsal ‘bump’ subapically ( Fig. 15 View Figures 8–16 ); NE-Vic H. jirrima