Hemistola species

Makhov, Ilya, 2023, Geometridae (Lepidoptera) of the Baikal region: identification keys and annotated catalogue with notes to DNA barcoding. Part 2. Archiearinae, Geometrinae, Sterrhinae, Zootaxa 5294 (1), pp. 1-120 : 20

Key to Hemistola species of the Baikal region

1. Forewing antemedial line (usually present) rather long, convex, more or less parallel to postmedial transverse line and termen, terminates near 1/3 of costa ( Fig. 17B ). Male genitalia: stout sclerotized spine in base of valva comparatively long; posterior projections of sternite A8 usually rounded ( Figs. 34A–34C ). In female genitalia ( Fig. 37E ) lamella postvaginalis small, without distinct semicircular furrow.................................................... H. chrysoprasaria (Esper, 1795)

- Forewing antemedial line (often almost absent: Figs. 17A , 57D ) markedly shorter than in H. chrysoprasaria , not convex, sharply curved inwards anteriorly, terminates closer to wing base, near ¼ of costa ( Figs. 16D , 57C ). Male genitalia: stout sclerotized spine in base of valva slightly shorter than in H. chrysoprasaria ; posterior projections of sternite A8 tapered ( Figs. 9A–G , 10 A–H , 34D–34F ). In female genitalia ( Figs. 37F, 37G ) lamella postvaginalis considerably larger than in H. chrysoprasaria , with distinct semicircular furrow................................................ H. zimmermanni (Hedemann, 1879)

Figures

FIGURE 9. Genital segments and sternites A8 of Siberian “Hemistola intermedia” (Krasnoyarsky Kray and Khakassia). A, C, E, G—genital segments; B, D, F—sternites A8.

FIGURE 10. Genital segments and sternites A8 of Far Eastern Hemistola zimmermanni (Zabaikalsky Kray, Khabarovsky Kray and Primorsky Kray). A, C, E, G—genital segments; B, D, F, H—sternites A8.

FIGURE 16. Adults of Siberian Geometrinae. A—Thetidia chlorophyllaria; B—T. smaragdaria; C—Comibaena amoenaria; D—Hemistola intermedia Lectotype; E—Geometra zimmermanni Lectotype.

FIGURE 17. Adults of Siberian Geometrinae. A—Hemistola zimmermanni; B—H. chrysoprasaria; C—Thalera fimbrialis; D—T. chlorosaria.

FIGURE 34. Male genitalia of Siberian Geometrinae. A–C—Hemistola chrysoprasaria; D–F—H. zimmermanni; G, H— Hemithea aestivaria; I–K—Thalera fimbrialis; L–N—T. chlorosaria. A, E, G, I, M—genital segment; B, F, H, J, N—phallos; B, F—vesica everted; K—valva, dorsal view; L—dorso-lateral view of genital segment. Scale bar—1 mm.

FIGURE 37. Female genitalia of Siberian Geometrinae. A—Geometra papilionaria; B—Thetidia chlorophyllaria; C—T. smaragdaria; D—Comibaena amoenaria; E—Hemistola chrysoprasaria; F, G—H. zimmermanni; H—Hemithea aestivaria. Scale bar—1 mm.

FIGURE 57. Adults of some Siberian Geometrinae in live. A—Thetidia chlorophyllaria (male); B–D—H. zimmermanni (B— male, C, D—females); E—Chlorissa viridata (male); F—Thalera chlorosaria (male). Photos by Marya Dementyeva (Irkutsk).