Ziridava xylinaria (Walker)

Schmidt, Olga, 2023, Comparison of the structure and musculature of male terminalia in the genera Chloroclystis Hübner, Sigilliclystis Galsworthy, and Ziridava Walker (Lepidoptera: Geometridae: Larentiinae), Zootaxa 5278 (3), pp. 555-562 : 557

Ziridava xylinaria (Walker)

( Figs 5–6 )

The uncus is reduced to a short trident, separated from the tegumen. The tegumen is short, narrow, not expanded apically, with tufts of long setae laterally. The rather short muscles m1 extend from the medio-lateral part of the tegumen, with the distal end inserted deep into the slightly broadened uncus base laterally. The gnathos arms are not distinct. The thin muscles m2(10) run from the tegumen, close to the muscles m1, to the distal part of the weakly sclerotized, complex subscaphium. The valvae are long, slender, broadened, semi-circular at the basal one-third, with a small basal process of the costa valvae. The muscles m3(2) extend from the ventral part of the tegumen to the ventral margin of the basal process of the costa valvae. The transtilla is rather broad, membranous, arising from the base of the costa valvae dorsad of the labides, with the muscles m4 attached to its medial part and appearing as two inseparable bundles. The other end of the muscles m4 is attached to the ventral part of the tegumen slightly ventrad of the muscles m3(2). The long muscles m5(7) extend from the small medio-dorsal projection of the vinculum and run to the medio-basal part of the valvae, close to the place of the insertion of the labides arms. The distal half of the juxta is broad, with its upper margin sclerotised and fused with the apical part of the anellus of the aedeagus. The rather short, curved muscles m8(3) connect the relatively broad ‘neck’ of the juxta with the saccus, whereas the dorso-lateral bundles of m8(3) are slightly longer and attached closer to the muscles m7(6). The aedeagus is large, broadest at the apex, with the rather thin muscles m6(5) running from the distal part of the vinculum to the basal process of the aedeagus. The lower margin of the saccus is bent ventrally. The two bundles of powerful, correspondingly curved, and twisted muscles m7(6) run from the inner wall of the saccus (with the bundles of m7a(6a) attached to its lateral curve) to the medio-distal part of the aedeagus. The eighth abdominal segment has a pair of octavals fused basally, rather similar to Chloroclystis but more elongated.

Figures

FIGURES 5–6. Ziridava xylinaria, male genitalia and muscles: 5. Armature (parts of valvae, parts of the muscles m2(10) and of the muscles m4 on the right side not shown, tufts of long setae laterally on the tegumen not shown. 6. Aedeagus.