Mesoscytina australis Tillyard, 1919

Lambkin, Kevin J., 2016, Revision of the Scytinopteridae (Hemiptera: Cicadomorpha: Scytinopteroidea) of the Queensland Triassic, Zootaxa 4117 (4), pp. 580-590 : 582

Mesoscytina australis Tillyard, 1919

( Figs 1–3 )

Mesoscytina australis Tillyard, 1919: 871 –872, text fig. 5.

Mesoscytina affinis Tillyard, 1919: 872 , text fig. 6. Syn. nov.

Triassoscarta subcostalis Tillyard, 1919: 874–875, text fig. 8. Syn. nov.

Material. Holotype tegmen GSQ 112a, holotype tegmen of Mesoscytina affinis GSQ 235 (labelled “Undoubtedly = M. australis B[enjamin]. D[unstan].”), holotype tegmen of Triassoscarta subcostalis GSQ 116a, all Denmark Hill. Three additional tegmina: Denmark Hill: “Tegmen G” GSQ 320a/b+; Esk: ACC: QM F58693 +,? F58694 +.

Description. Tegmen 9.3–9.5 mm long, 3.5–3.6 mm wide (holotype 9.5, 3.5), length/width 2.6–2.9; R gently curved basally, at point of curvature costal space wider than space between R and M; RA strongly inclined; no colour pattern detected.

Notes. The holotype of M. affinis is the basal half of a tegmen identical in size and venation to that of the holotype of M. australis . The Esk tegmen, QM F58693 ( Fig. 3 ), although older and from a different formation, is referred to the species on its similar size and basic venation, although CuA is more deeply forked than in the holotype. It has dSc well preserved. The other Esk tegmen is the same size but poorly preserved. Its identity therefore remains doubtful.

Figures

FIGURES 1 – 3. Mesoscytina australis Tillyard: 1 – 2, holotype GSQ 112 a; bSc, free base of Sc; cf, costal fracture; dSc, distal portion of Sc; 3, QM F 58693 (the darker areas are shadows).