GEOMETRINAE

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 : 19

Subfamily GEOMETRINAE

Key to genera

1. Frons green, yellowish or white.......................................................................... 2

- Frons brown, often almost black......................................................................... 5

2. Tornus of forewing and apex of hindwing with small rust coloured spots ( Fig. 16C ).......................................................................................... Comibaena Hübner, 1823 ( amoenaria Oberthür, 1880 )

- Wings without rusty spots on forewing tornus and hindwing apex............................................... 3

3. Hindwing venation: М3 and Cu1 stalked ( Fig. 4A )............................................ Jodis Hübner, 1823

- Hindwing venation: М3 and Cu1 not stalked ( Fig. 4B )........................................................ 4

4. Termen of hindwing wavy ( Figs. 4B , 15D ).................... Geometra Linnaeus, 1758 ( papilionaria Linnaeus, 1758 )

- Termen of hindwing smooth ( Figs. 16A, 16B )........................................... Thetidia Boisduval, 1840

5. Hindwing distinctly lighter than forewing, whitish ( Fig. 18B )...... Dyschloropsis Warren, 1895 ( impararia Guenée, 1858 )

- Hindwing not lighter than forewing....................................................................... 6

6. Fringes chequered, termen of hindwing jagged or with acute angle at М3 ......................................... 7

- Fringes unicolorous, termen of hindwing rounded or with obtuse angle at М3 ...................................... 8

7. Palpi short, not projecting beyond frons; antenna of male shortly bipectinate; in male sternite A3 without setal patches; hindtibia of female with pair of spurs............................................................ Thalera Hübner, 1823

- Palpi longer: extending beyond frons; antenna of male filiform; in male sternite A3 with paired setal patches ( Fig. 5E ); hindtibia of female with two pairs of spurs.............................. Hemithea Duponchel, 1829 ( aestivaria Hübner, 1799 )

8. Antennae of both sexes filiform, ciliate; hindtibia of female with pair of spurs................. Chlorissa Stephens, 1831

- Antennae bipectinate in male, shortly bipectinate in female; hindtibia of female with two pairs of spurs.................................................................................................. Hemistola Warren, 1893

Figures

FIGURE 4. Wing venation. A—Jodis putata; B—Geometra papilionaria; C—Hemithea aestivaria; D—Chlorissa viridata; E—Holarctias rufinaria; F—Rhodostrophia vibicaria; G—Scopula ornata; H—Timandra rectistrigaria; I—Cyclophora albipunctata. A–D—hindwings; E, F—forewings; G–I—right pair of wings. R veins marked in red, M veins marked in blue, Cu veins marked in green, areole marked in teal.

FIGURE 5. Morphological structures of male abdomen. A—Holarctias rufinaria; B—Scopula ternata; C—S. nigropunctata; D—S. incanata; E—Chlorissa obliterata. A, B, C—genital segment; D—sternite A8; E—basal sternites of abdomen.

FIGURE 15. Adults of Siberian Archiearinae and Geometrinae. A—Archiearis parthenias; B—A. notha; C—Leucobrephos middendorfii; D—Geometra papilionaria.

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

FIGURE 18. Adults of Siberian Geometrinae. A—Hemithea aestivaria; B—Dyschloropsis impararia; C—Chlorissa viridata; D—C. obliterata.