Orthosia ryrholmi Ronkay et al., 2010 (: ), a New Species for the Fauna of Russia Source: Entomological News, 124(4):282-286. Published By: The American Entomological Society DOI: http://dx.doi.org/10.3157/021.124.0406 URL: http://www.bioone.org/doi/full/10.3157/021.124.0406

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ORTHOSIA RYRHOLMI RONKAY ET AL., 2010 (LEPIDOPTERA: NOCTUIDAE), A NEW SPECIES FOR THE FAUNA OF RUSSIA1

Anton Volynkin2 and Vladimir Dubatolov3

ABSTRACT: Orthosia ryrholmi G. Ronkay, L. Ronkay, Gyulai & Hacker, 2010, recently described from China, is recorded in Russia for the first time. The new locality is distant from the three other known localities in China by up to 2800 km. This is a north-easternmost known locality of the species. Adults, male and female genitalia of O. ryrholmi and a sibling species O. populeti (Fabricius, 1781) are illustrated, and the diagnosis for O. ryrholmi is presented.

KEY WORDS: Lepidoptera, Noctuidae, Orthosia, Russia, China

Noctuidae is one of the most species-rich families of Lepidoptera (Nieukerken et al., 2011). The noctuid Orthosia Ochsenheimer, 1816 belongs to the tribe , subfamily Noctuinae (Zahiri et al., 2013). This Holarctic-Orien- tal genus includes more than 60 described species with most distributed in the eastern and southeastern Palaearctic and Oriental regions, and subdivided into seven described subgenera (Kononenko et al., 1998; Ronkay et al., 2001; Ronkay et al., 2010): Euchoristea Warren, 1910, Orthosia Ochsenheimer, 1816, Monima Hübner [1821], Poporthosia Beck, 1996, Cororthosia Berio, 1980, Semiophora Stephens, 1829 and Erythrotis Bryk, 1948. The subgeneric placement of some species-groups is still unclear. Poporthosia was erected by Beck (1996, 1999) for Bombyx populeti Fabricius, 1781. Ronkay et al. (2001) preliminarily treated Poporthosia as a synonym of Monima, while noting that the subgeneric position of populeti is unclear. Later, Ronkay et al. (2010) treated Poporthosia as a distinct subgenus including two described species: O. (P.) populeti and O. (P.) ryrholmi. The latter was described by them from central China (Shaanxi and Sichuan provinces). In the course of faunistic studies on Lepidoptera of the Bolshekhekhtsyrskii Nature Reserve (Russian Far East, Khabarovsk territory), a series of Poporthosia species were collected. It was reported for the region as O. populeti (Dubatolov and Dolgikh, 2009), but study of the male and female genitalia showed these specimens to belong to another species, O. ryrholmi. This is a first record of the species for the fauna of Russia (Fig. 1).

______1 Received on June 10, 2014. Accepted on September 27, 2014. 2 Altai State University, South Siberian Botanical Garden, Lenina str. 61. RF-656000. Barnaul, Rus- sian Federation; Tigirek State Natural Reserve, Nikitina str. 111, office 42. RF-656043. Barnaul, Rus sian Federation. E-mail: [email protected]. 3 Siberian Zoological Museum, Institute of Systematics and Ecology of , Siberian Branch of Russian Academy of Sciences, Frunze str., 11, Novosibirsk, 630091, Russia. E-mail: vvdubat@ mail.ru. Mailed on February 5, 2015 Volume 124, Number 4, January 2015 283

Fig. 1. Map of known localities of Orthosia ryrholmi.

METHODS The night collecting was made by using mercury and UV lights. The speci- mens were examined using modern dissection standards for preparation of male and female genitalia of Lepidoptera.

RESULTS Orthosia (Poporthosia) ryrholmi G. Ronkay, L. Ronkay, Gyulai & Hacker, 2010 Orthosia (Poporthosia) ryrholmi G. Ronkay, L. Ronkay, Gyulai & Hacker, 2010, Esperiana 15: 138, pl. 16, Figs. 7-8, gen. Fig. 23 (Type locality: China, Shaanxi, Taibaishan Mts, 1500 m). Material examined: 20 males, 12 females, vicinity of Khabarovsk, Bolshek- hek htsyrskii Nature Reserve, 48°18' N, 134°49' E, Bychikha, at light: 26.iv.– 04.v.2006, 22–28.iv.2007, 7–9.iv.2008, V. V. Dubatolov and A. M. Dolgikh leg.; 6 males, vicinity of Khabarovsk, Bolshekhekhtsyrskii Nature Reserve, 48°16' N, 134°45' E, Kazakevichevo, at light, 22–28.iv.2007, A. M. Dolgikh leg. (the spec- imens are deposited in the collection of the Siberian Zoological Museum, Insti - tute of Systematic and Ecology of the Siberian Branch of the Rus sian Academy of Sciences, SZMN, Novosibirsk, Russia). Diagnosis. O. ryrholmi (Figs. 2A, 2B) and O. populeti (Figs. 2C, 2D) are externally very similar, but O. ryrholmi has somewhat broader forewings. The correct determination of the species needs study of the genitalia. The male geni- 284 ENTOMOLOGICAL NEWS

Fig. 2. Orthosia (Poporthosia) spp., adults. A – O. ryrholmi, male, Khabarovsk terr., Bychikha (SZMN); B – O. ryrholmi, female, same locality (SZMN); C – O. populeti, male, West Siberia, Novosibirsk (SZMN); D – O. populeti, female, same locality (SZMN). talia of O. ryrholmi (Fig. 3A) differ from those of O. populeti (Fig. 3C) in the somewhat longer and more pointed cucullus, the smaller aedeagus in comparison to the genital capsule, absence of the dorso-lateral cornutus of the vesica and the shorter proximal part of the vesica. In the female genitalia, O. ryrholmi differs in the broader medial part of ductus bursae, the much shorter anterior, tubular- ribbed part of the ductus bursae and the twisted appedix bursae (Figs. 3B, 3D). Taxonomic notes. Many related taxa of the tribe Orthosiini have small dif- ferences in the genital structures (e. g., Orthosia incerta (Hufnagel, 1766) and O. nigromaculata Höne, 1917 species-groups, O. gracilis ([Denis & Schiffer - mül ler], 1755) – O. ella (Butler, 1878), O. marmorata G. Ronkay & al., 2010 – O. coniortota Filipjev, 1927 and O. paromoea (Hampson, 1905) – O. yelai G. Ron kay & al., 2010 species-pairs, Perigrapha circumducta (Lederer, 1855), P. i-cinctum ([Denis & Schiffermüller], 1755) and P. hoenei Püngeler, 1914 species-groups, etc.). Most of these species have allopatric distribution and their true taxonomic status is unclear. The interpretation of such allopatric taxa is sub- jective now (Mutanen et al., 2012). The strongly allopatric taxa O. populeti and O. ryrholmi also possess very similar genital structures, but such differences as the aedeagus size, the vesica length and the absence of cornutus in males and the ductus bursae length and the appendix bursae shape in females are the important species features in the tribe, therefore here we follow Ronkay et al. (2010) and treat populeti and ryrholmi as distinct species. Volume 124, Number 4, January 2015 285

Figure 3. Orthosia (Poporthosia) spp., male and female genitalia. A – O. ryrholmi, male genitalia, Khabarovsk terr., Bychikha; B – O. ryrholmi, female genitalia, same locality; C – O. populeti, male genitalia, West Siberia, Novosibirsk; D – O. populeti, female gen- italia, same locality. 286 ENTOMOLOGICAL NEWS

Distribution (Fig. 1). The species is known from central China (Shaanxi and Sichuan provinces) and the Russian Far East (Khabarovsk territory). The new locality is distant from the three other known localities in China by up to 2800 km.

ACKNOWLEDGEMENTS We are grateful to the staff of the Bolshekhekhtsyrskii Nature Reserve for their kind help in the field work.

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