STERRHINAE, Meyrick, 1892

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 : 20-21

Subfamily STERRHINAE

Key to the genera

1. Eyes small, diameter of eye less than width of frons ( Figs. 3C, 3F ).............................................. 2

- Eyes developed normally, diameter of eye not less than width of frons ( Fig. 3G )................................... 4

2. Forewing no longer than 6 mm, with no areoles; male antenna bipectinate ( Fig. 3E ).............................................................................................. Cleta Duponchel, 1845 ( jacutica Viidalepp, 1976 )

- Forewing longer than 8 mm, with areole ( Fig. 4E )........................................................... 3

3. Wings with inconspicuous veins, hindwing with no dark transverse lines ( Fig. 31A ); male antenna bipectinate........................................................................ Lythria Hübner, 1823 ( purpuraria Linnaeus, 1758 )

- Both wings commonly with distinct dark transverse lines and veins ( Figs. 22D , 23A ); male antenna ciliate-fasciculate ( Fig. 3D ).............................................................................. Holarctias Prout, 1913

4. Forewing with double areole ( Fig. 4F ).............................................. Rhodostrophia Hübner, 1823

- Forewing without areole or with single areole............................................................... 5

5. Hindwing venation: RS and М1 stalked ( Figs. 4H, 4I )......................................................... 6

- Hindwing venation: RS and М1 arise from discal cell separately ( Fig. 4G )...................... Scopula Schrank, 1802

6. Male antenna bipectinate; hindtibia of female with 2 pairs of spurs.............................................. 7

- Male antenna filiform; hindtibia of female with one pair of spurs.............................. Idaea Treitschke, 1825

7. Forewing venation: R1 arises from areole before branching of vein R5 ( Fig. 4H ). Hindwing termen usually with angle or projection or short tail on vein М3. Upper-side of wings pale greyish-yellow, with oblique dark line running from forewing apex to inner margin of hindwing; discal spots not ringed, or absent............................ Timandra Duponchel, 1829

- Forewing venation: R1 arises from common stalk of R2–R4, after branching of vein R5 ( Fig. 4I ). Hindwing termen rounded, with no conspicuous projection; wings with no oblique line; discal spot of both wings ringed, with white center ( Fig. 29D )........................................................ Cyclophora Hübner, 1822 ( albipunctata Hufnagel, 1767 )

Figures

FIGURE 3. Morphological structures of head.A—Archiearis notha; B—A. parthenias; C, E—Cleta jacutica; D, F—Holarctias rufinaria; G—Scopula ornata. A, B, D—antennae of males; C, F—head, frontal view; E—lateral view; G—dorsal view; f. w.—frons width; d. e.—diameter of eye.

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 22. Adults of Siberian Sterrhinae. A—Idaea aversata; B—I. straminata; C—I. descitaria; D—Holarctias rufinaria.

FIGURE 23. Adults of Siberian Sterrhinae. A—Holarctias rufinularia; B—Scopula agutsaensis; C—S. immorata; D—S. corrivalaria.

FIGURE 29. Adults of Siberian Sterrhinae. A—Scopula aequifasciata; B—S. cajanderi; C—S. albiceraria; D—Cyclophora albipunctata.

FIGURE 31. Adults of Siberian Sterrhinae. A—Lythria purpuraria; B—Rhodostrophia jacularia.