Idaea dohlmanni (Hedemann, 1881)

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 : 43-44

4. Idaea dohlmanni (Hedemann, 1881)

(adults Fig. 19D ; male gen. Figs. 40A–40C ; female gen. Fig. 49J )

? Acidalia perochraria , nec (Rösslerstamm, 1838): Herz, 1898: 259; Staudinger, 1892: 373.

? Acidalia similata , nec (Thunberg, 1791): Staudinger & Rebel, 1901: 265.

Idaea serpentata , nec (Hufnagel, 1767): Viidalepp, 1996: 50; Berlov & Berlov, 2006: 102; Mironov et al., 2008: 207; Belova, 2012: 42; 2015: 220; Mironov & Belova, 2015: 61.

? Sterra [sic!] ochrata , nec (Scopoli, 1763): Belova, 2005: 272.

Idaea dohlmanni: Berlov & Berlov, 2006: 102 ; Gordeeva & Gordeev, 2007: 122; 2020: 71; Mironov et al., 2008: 207; Beljaev & Mironov, 2019: 277.

Material examined. Krasnoyarsky Kray: ́Siberia C. Mer. Fl. Ulen, 110 km ad oc. A Minusinsk, 17.VII.1909, N. Tshetverikov», 3 ♁, 1 ♀; «Siberia C. Mer. Fl. Ijus Alb. 130 km ad oc. A Minusinsk, 20.VII.1908, N. Tshetverikov», 1 ♁; «Siberia C. Mer. Ost. Fl. Kaspar, ACCR. Fl. Ijus 120 km ad oc. A Minusinsk, 15.VII.1909, N. Tshetverikov», 5 ♁; «Siberia C. Mer. Fl. Jenisej, 40 km supra Minusinsk, 25.VII.1908, N. Tshetverikov», 1 ♁; «Siberia C. Mer. Distr. Minusinsk, loc. Korjakovo, 25. VI.1913, N. Tshetverikov», 1 ♁; «Minusinsk Distr. 17.VII.1926 », 2 ♁ [ ZIN]. Irkutskaya Oblast: Lavrentyevo, 13.VII.2011, 1 spm.; same loc., 19.VII.2020, 1 ♁ (GenBank ID: OK 073187); D. Lebedinoye, 27.VII.2012, 1 spm.; Rodnik, 9.VII.2015, 5 ♁; Magistralny, 27.VII.2012, 1 spm.; Sarma, 22.VII.2019, 2 ♁; Tazheranskaya steppe, 28.VII.2020, 1 ♀, I. Makhov; “Irkutskaya gubernia, Saga –Ugunskaya road”, 11.VII.1911, 1 ♁ (unknown collector); Tchikan, 8.VII.1910, 1 ♁, N. Kuznetsova; Uladovo, 10.VII.1913, 1 ♁; Shulun-Khurbe, 29. VI.1914, 1 ♁, 1 ♀, S. Rodionov; “Transbaikalia, Mnt. Khamar-Daban, 8–15.VII.1905 ”, 1 ♁, V. Dorogostaysky [ ZIN]; Parfenovka, 25.VII.2004, 1 spm.; Pokoyniki, 23.VII.2005, 1 spm., O. Berlov; Kotchergat, 20.VII.1993, 1 spm.; Irkutsk, 7.VIII.1973, 1 spm., E. Berlov [ EB]; Podkamennaya, 15.VII.2011, 1 spm., V. Shilenkov; Melnikovo, 22.VII.1941, 3 spms.; same loc., 27.VII.1941, 1 spm., A. Bykov [ BF]. Buryatia: Gegetuy, 11.VII.2016, 1 ♁; Enkheluk, 22.VII.2011, 3 spms.; M. Tasarkhay, 8.VII.2016, 2 ♀, I. Makhov; Ulan-Ude, 14.VII.1962, 1 ♁; same loc., 27.VII.1956, 1 ♁, V. Kolmakova [ ZIN]; Munku-Sardyk, 1500 m.a.s.l., 30. VI.2002, 1 ♁, R. & A. Dudko [ ISEA]. Republic of Sakha (Yakutia): Aldansky District, 6 km SW of Yakokit vill. (58°52’41”N 125°44’09”E), 17.VII.2021, 2 ♁ (GenBank ID: OK 314977, OK314978), I. Makhov; Megino-Kangalassky Distr., Bestyakh vill., 5.VII.1909, 3 ♁, Naumov [ ZIN].

Distribution. Siberian–Far Eastern, subboreal. Northern part of Krasnoyarsky Kray,?southern part of Krasnoyarsky Kray, Khakassia,? Altai,? Tuva, Irkutskaya Oblast, Republic of Buryatia, S Yakutia, Amurskaya Oblast, Jewish Autonomous Oblast, southern part of Khabarovsky Kray,?Primorye. Outside Russia in Mongolia.

Hostplants: unknown.

Remarks. In addition to the I. dohlmanni moths collected in the Baikal region by me and other collectors, I studied specimens (11 males and 1 female, see the section ́Material examined») that correspond to the features of this species from the Krasnoyarsk Territory, where the range of I. dohlmanni may presumably overlap with the range of the closely related I. serpentata . Genitalia of males from Krasnoyarsky Kray appeared to be intermediate between I. dohlmanni and I. serpentata ( Figs. 40D, 40E ): valva is shorter and wider than in typical I. dohlmanni , process of its ventral margin is more protruding than in typical I. dohlmanni , and cannot be unambiguously interpreted as typical for one or another species; saccus is significantly shorter than in I. dohlmanni and corresponds in length to I. serpentata . The shape of aedeagus and cornutus has also an intermediate state. The barcodes obtained from Siberian I. dohlmanni (GenBank: OK073187, OK314977, OK314978) are almost identical to the European specimens of I. serpentata . Possibly, these two closely related species are not differentiated by mitochondrial DNA, as well as by external morphology. Allopatric populations show clear differences in the genitalia of both sexes, however, individuals occurring in the zone of possible sympatry have intermediate features of genitalia. Taking into account the identity of the barcodes, I do not exclude the possible hybridization of these taxa. The further investigation is required.

Figures

FIGURE 19. Adults of Siberian Sterrhinae. A—Rhodostrophia vibicaria; B—R. jacularia; C—Cleta jacutica; D—Idaea dohlmanni.

FIGURE 40. Male genitalia of Siberian Sterrhinae.A–C—Idaea dohlmanni; D, E—possible hybrid I. dohlmanni × I.serpentata; F, G—I. serpentata; H–J—I. falckii; K–M—I. aureolaria; N–P—I. muricata. A, D, F, H, K, O—genital segment, ventral view; B, D, I, M, P—ditto, lateral view; C, E, G, J, L, N—phallos. Scale bar—1 mm.

FIGURE 49. Genitalia of Siberian Sterrhinae. A, B—Timandra recompta; C, D—T. paralias; E, F—Lythria purpuraria; G— Rhodostrophia vibicaria; H—R. jacularia; I—Idaea serpentata; J—I. dohlmanni. A, D, E—genital segment; B, C, F—phallos; G–J—bursa copulatrix of female. Scale bar—1 mm.