Eoscartoides orthocladus (Tillyard) 1922

Lambkin, Kevin J., 2016, Revision of the Dysmorphoptilidae (Hemiptera: Cicadomorpha: Prosboloidea) of the Queensland Triassic — Part 2, Zootaxa 4092 (2), pp. 207-218 : 209

Eoscartoides orthocladus (Tillyard) 1922 , comb. nov.

( Figs 4–6 )

Mesocixiodes orthoclada Tillyard, 1922: 463, text-fig. 83.

Material. Holotype left tegmen, GSQ 318a, Denmark Hill. Three additional tegmina, Denmark Hill: GSQ 91a/b+, 193a, 324a/b+.

Description. Tegmen long and narrow, 13.6 mm long, 4.8 mm wide (measurements from holotype only), length/width 2.8, anterior margin almost straight; stem of R shorter than in M. bryani , its primary fork before clavus ½ length; stems of R and RA with 0 or 1 simple costal veinlet; stem of RA1 enters costal margin at about ⅔ tegmen length, with 3 anterior branches; RA2 with 4–5 branches; RP simple, slightly up-curved apically; M1 with a terminal fork, M3+4 simple; CuA2 only slightly shorter than CuA1; no colour pattern detected.

Notes. All four specimens are poorly preserved. Even though the venation of E. orthocladus is similar to that of E. bryani , the different wing shape and the fact that it is from the younger Blackstone Formation at Denmark Hill are considered as sufficient to justify its status as a distinct species. The specific name has been changed to masculine in accord with ICZN Article 30.1.4.4.

Figures

FIGURES 4 – 6. Eoscartoides orthocladus (Tillyard): 4 – 5, holotype GSQ 318 a, arrow shows bend at proximal corner of clavus; 6, GSQ 193 a, apex of tegmen; cc, commissural carina; pm, posterior margin.