Carbrunneria cattana Rentz & Su, 2025

Carbrunneria cattana Rentz & Su , sp. nov.

Figs 1A–F View FIG : Table 1: Map 1

Type material. Holotype male. 1. “ 16049 ’50’S 145042 ’01E Cattana Wetlands (Smithfield) QLD Dunne Rd 12 m 28 September 2024 DCF Rentz Stop 12”. 2. “ ANIC database #9-006316” . Holotype in Australian National Insect Collection, Canberra. Paratype. A single female with the same data at the holotype.

Differential diagnosis. Size similar to related species C. maxi (Roth) and C. paramaxi (Roth) . Head with dark brown bridge between the eyes, occiput light brown ( Fig. 1A View FIG ); frons with distinctive pattern, although this can be faded on some specimens; pronotum with markings typical of congeners ( Fig. 1A View FIG ). Antennae with scape and pedicel slightly lighter than flagellum; flagellum uniformly dark brown, not annulate ( Fig. 1A View FIG ). Legs plain, light brown, coxae with a single mark at base. Tegmina with longitudinal veins slightly darker than the rest. Male. Tenth tergite with median shallow incision, internal margin slightly tipped downwards. Genitalia with bifurcate structure on right, two sclerotised structures on the right and bearing a distinctive hirsute ball-like structure at base ( Fig. 1D View FIG ). Subgenital plate with stubby style on the right with C-shaped tooth and 2 smaller teeth, right portion also with a series of minute teeth ( Figs 1B, C View FIG ). Female with tenth tergite divided ( Fig. 1E View FIG ), subgenital plate scoop-shaped with a broad brown median longitudinal stripe ( Fig. 1E View FIG )

Description. Male/female. Colour and pattern typical of most Carbrunneria and Beybienkoa species ( Fig. 1A View FIG ). Head as above. Pronotum with distinctive colour and pattern but similar to that of both C. maxi (Roth) and C. paramaxi (Roth) ( Fig. 1A View FIG ). Legs as above. Tegmina with many diagonal veins on costal margin. Male. Abdomen with tenth tergite divided, corners feebly bent downwards, no trace of “tails”; concealed genitalia with divided scissor-like structure on the left below cercus ( Fig. 1D View FIG ), right portion with several sclerotised structures and bearing an inflated ball like structure at base which is sparsely hirsute. Subgenital plate with left style long and slender, right style short with teeth, right portion also serrated ( Figs 1B, C View FIG ).

Female. Similar to male, slightly larger.Tenth tergite slightly produced, apex feebly divided ( Fig. 1E View FIG ). Subgenital plate ( Fig.1E View FIG ) broadly scoop-shaped and with a broad brown median longitudinal stripe.

Distribution. Presently known only from the type locality Map 1.

Remarks. There is little doubt that this taxon is related to both C. maxi and C. paramaxi . Both C. maxi and C. paramaxi are highly variable. We have observed variation in C. maxi in the “tails”, the projections emanating from the tenth tergite or the supra-anal plate. In some specimens one side may have the tail, the other not. With these specimens, there is no indication that the tail had been broken. Similarly, variation in the darkening of the frons can be intense or very faint and that apparently not due to age. In our C. cattana sp. nov. the hairy balloon-like structure of the male is also present in both C. maxi and C. paramaxi .

Etymology. Named in apposition after the Cattana Wetlands, Smithfield, Queensland.