Trigonidium (Trigonidium) australianum (Chopard, 1925)

Figs 31, 32E–F

Metioche australiana Chopard, 1925: 36 .

Trigonidomorpha sjostedti Chopard, 1925: 40 syn. nov.

Trigonidomorpha areolata Chopard, 1925: 38 syn. nov.

Metioche australiana – Chopard 1968: 334.

Metioche areolata – Chopard 1968: 334.

Trigonidium australiana – Otte & Alexander 1983: 228.

Trigonidomorpha sjostedti – Otte & Alexander 1983: 223. — Rentz & Su 2019: 316.

Trigonidium (Trigonidium) australiana – Rentz & Su 2019: 304.

Amended diagnosis

A small trig (body length 4 to 5 mm), with black body and yellow legs, very similar to Trigonidium (Trigonidium) maoricum in every aspect. Slightly smaller than the latter, it has a shorter stridulatory file with less than 20 teeth. Adult insects come in a wingless morph without hindwings or auditory tympana, and in a winged morph with hindwings and with auditory tympana. The winged morph was previously mistaken to be a different species, Trigonidomorpha sjostedti .

Etymology

The Latin adjective australianum refers to the country the insect is found in.

Material examined

AUSTRALIA • 1 ♂, 1 ♀; Queensland, Brisbane, Oxley Creek Commons; 27.53566° S, 152.99306° E; 10 m a.s.l.; 17 Nov. 2023; D. Hegg leg.; in tall grass; insect net; MPN OR0403, OR0405 • 1 ♂; same data as for preceding; GenBank: PP761115; MPN OR0402 • 1 ♀; same data as for preceding; GenBank: PP761116; MPN OR0404 .

Description

Not included in this paper since this is not a New Zealand species.

MEASUREMENTS. See Table 7.

Distribution

Australia. Northern, eastern and western coastal regions.