Eupithecia subfuscata (Haworth)

Schmidt, Olga, 2020, The structure and musculature of male terminalia in the Palaearctic and Indo- Australian species of the eupitheciine genera Eupithecia Curtis, Gymnoscelis Mabille, and Pasiphila Meyrick (Lepidoptera: Geometridae: Larentiinae), Zootaxa 4896 (2), pp. 224-238 : 225-226

Eupithecia subfuscata (Haworth) , semigraphata species-group

( Figs 1–2 )

The uncus is rather small, acute, biapical, with broadened lobes at the base. The gnathos arms are much reduced, forming a narrow medially broken ring. The proximal area of the anal tube is connected to the gnathos. The thin muscles m1 run from the medio-lateral parts of the tegumen to the broadened lobes at the uncus base. The muscles m2(10) are attached to the tegumen, close to the proximal end of the muscles m1, and run parallel to the subscaphium to the inner surface of the anal tube distally. The basal process of the costa valvae is rather large and the muscles m3(2) run to its ventral margin from the proximal part of the tegumen, slightly dorsad of the muscles m4. The labides arising from the base of the costa valvae ventrally consist of rather short bent anterior arms with narrow finger-like setose ventral papillae curved laterally towards the juxta and thin posterior arms bearing setose papillae apically. The transtilla is band-like, arising from the base of the costa valvae dorsad of the labides. The muscles m4, looking like two inseparable bundles, run from the ventral corner of the tegumen to the transtilla medially. The thin muscles m5(7) connect the inner wall of the valva (close to the base of the costa valvae) to the vinculum curve. The juxta is rather large, broadest crosswise, and the voluminous, curved muscles m8(3) extend from the medio-dorsal part of the juxta to the posterior area of the saccus. The small sacs of coremata are present at the lateral margin of vinculum. The aedeagus is rather large, broadest at the base, with several long and short cornuti of different shape in the vesica, with the muscles m6(5) running from the vinculum to the basal process of the aedeagus. The slightly twisted muscles m7(6) connect the lower margin of the saccus to the distal part of the aedeagus.

Note. The genitalia of Eupithecia tantillaria (Boisduval, 1840) from the tantillaria species-group have been studied recently ( Schmidt 2014b). The male genital musculature of E. tantillaria and E. subfuscata is similar, including the twisted muscles m6(5).

Figures

FIGURES 1–2. Eupithecia subfuscata, male genitalia and muscles: 1. Armature (left valva partly removed, muscles m1 on the left side removed, proximal part of the anal tube and of muscles m2(10) on the left side, muscles m3(2) on the left side not shown). 2. Aedeagus.