Dysmorphoptiloides elongata Evans, 1956

Lambkin, Kevin J., 2015, Revision of the Dysmorphoptilidae with emarginate tegmina (Hemiptera: Auchenorryncha: Cicadomorpha: Prosboloidea) of the Queensland Triassic, Zootaxa 3936 (3), pp. 357-374 : 367

Dysmorphoptiloides elongata Evans, 1956

( Figs 8 , 13–17 , 20 )

Dysmorphoptiloides elongata Evans, 1956: 219 , figs 17A, 17B, 17D; Evans 1961: 18; Evans 1971: 146, fig. 2.

Material. Holotype left tegmen UQG C686, paratype tegmina UQG: C613/614+, C962/963+, C950/951+, C1434/ 1435+, all from Mount Crosby Locality A. 51 additional tegmen specimens, all from Mount Crosby: Locality A: QM: F57798 , F57799 +, F57800 +, F57801 +, F57802 , F57803 + (formerly UQE S2, S3/3A+, S7/7A+, S14/14A+, 14, 16/16A+, listed by Evans 1961). Locality B: UQG: F63997 , F64001 , F64002 , F64004 , F64007 , F64009 ; QM: F6493a/b+, F6498a/b+, F6542 ( Evans 1971), F6502a/b+, F6971a/b+, F6972a/b+, F6973, F6974a/b+, F6975, F57804 +, F57805 , F57806 , F57807 , F57808 +, F57809 , F57810 ; KLC: QM F57811 , QM F57812 +, QM F57813 +, QM F57814 – F57820 ; ACC: I.103, I.104, I.105, I.106, I.107, I.108+, I.109, I.111+, I.112+, I.113+. Locality D: KLC: QM F57821 , QM F57822 +; ACC: I.110.

Description. Tegmen 15.7–16.5 mm long (holotype 16.5), 4.9–6.2 mm wide (holotype 5.5 mm), length/width 2.6–3.1 (holotype 3.0); strongly emarginate at the apex of RA and less so at the apex of CuA; apical lobe somewhat variable in relative length and proportion, ranging from about as long as wide and occupying about 0.25 of total wing length ( Fig. 13 ), to about 1.4 times longer than wide and occupying about 0.4 of total wing length ( Fig. 16 ); apical half of costal space somewhat variable in width, the narrower the space, the less accentuated the emargination at the apex of RA (compare Figs 15 and 16 ); hind margin of clavus with up to 6 irregularly spaced small swellings ( Fig. 8 ); R with 2–4 costal veinlets which are sometimes forked; branches of RA2 and M sometimes with end-twigs ( Fig. 16 ); colour pattern apparently somewhat variable—most specimens with a fairly consistent dark patterning comprising a fascia across R, M and Cu, a central spot on RP, a blotch apically around M and CuA, and diffuse patterning in the costal space and across the apical third of the tegmen (Figs 13,15), however one specimen has black speckling all over somewhat masking the underlying more usual pattern which is still discernable ( Fig. 16 ), and a few others appear entirely steel grey ( Fig. 17 ), although the latter colour state may be preservation-related manganese staining.

Notes. Dysmorphoptiloides elongata is one of the most common fossil insects found at Mount Crosby, probably in part due to the robustness of its coarsely punctate coriaceous tegmina during sedimentary transport and deposition.

Figures

FIGURES 6 – 8. Swellings on hind margin of clavus: 6, Mesocixius parvus (Evans), QM F 57793 (mirrored); 7, Carsburgia knezouri gen. et sp. nov., QM F 57797; 8, Dysmorphoptiloides elongata Evans, ACC I. 103 (mirrored).

FIGURES 13 – 14. Dysmorphoptiloides elongata Evans, QM F 57811; str, area of strigil.

FIGURES 15 – 17. Dysmorphoptiloides elongata Evans, colour patterns: 15, ACC I. 105 (mirrored); 16, ACC I. 106 (mirrored); 17, QM F 57813.

FIGURES 20 – 22. Strigil in basal costal space: 20, Dysmorphoptiloides elongata Evans, ACC I. 104 (mirrored); 21, Tennentsia princeps sp. nov., holotype QM F 57824; 22, Tennentsia evansi sp nov., holotype QM F 57827.