РОССИЙСКАЯ АКАДЕМИЯ НАУК Южный Научный Центр RUSSIAN ACADEMY OF SCIENCES Southern Scientific Centre CAUCASIAN ENTOMOLOGICAL BULLETIN Том 2. Вып. 1 Vol. 2. No. 1 Ростов-на-Дону 2006 Кавказский энтомол. бюллетень 2(1): 73–78 © CAUCASIAN ENTOMOLOGICAL BULL. 2006 About composition of the genus Myatis Bates, 1879 (Coleoptera: Tenebrionidae: Platyscelidini) О составе рода Myatis Bates, 1879 (Coleoptera: Tenebrionidae: Platyscelidini) L.V. Egorov Л.В. Егоров Chuvash State Pedagogical University, K. Marx str., 38, Cheboksary 428000 Russia. E-mail: [email protected] Чувашский государственный педагогический университет, ул. К. Маркса, 38, Чебоксары 428000 Россия Key words: Tenebrionidae, Platyscelidini, Myatis, composition of the genus, morphology, synonymy. Ключевые слова: Tenebrionidae, Platyscelidini, Myatis, состав рода, морфология, синонимия. Abstract. A history of investigation of the genus Later Bogachev [1952] described the new species Myatis Myatis Bates, 1879 and its composition is discussed on the tadzhika Bogatchev, 1952 based on the material from world basis. Bioramix (Leipopleura) nagquana (Meng et Darvaz ridge. Kaszab [1960] transferred this species to Ren, 2005), comb. n. is transferred from the genus Myatis. the genus Trichoplatynoscelis Kaszab, 1940. I consider A new synonym is established: Bioramix (Leipopleura) this name as a junior synonym of Trichomyatis Schuster, micans (Reitter, 1889) = Myatis brevipilosum Meng et Ren, 1931 [Egorov, 2004a, b]. And therefore, that species was 2005, syn. n. Lectotypes of Myatis quadraticollis Bates, considered in the genus Trichomyatis [Egorov, 2006]. In 1879, Myatis variabilis Bates, 1879, Leipopleura tenuissima the reviews of the system of the tribe Platyscelidini [Egorov, Reitter, 1896 are designated. The generic position ofMyatis 2004a, b], two species, Myatis humeralis and M. schaeferi in the tribe Platyscelidini is discussed. Modern taxonomic are considered in the genus Myatis. Also, in these papers diagnosis of the genus and characteristics of Myatis M. variabilis and M. quadraticollis are placed in synonymy humeralis are discussed. to M. humeralis. Review of the genus Myatis of China Резюме. Приведена история изучения рода Myatis and the adjacent countries is recently published [Meng, Bates, 1879 и обсужден его состав в объеме мировой Ren, 2005]. In this work seven species are considered in фауны. Один вид, ранее относимый к роду, перенесен the genus, two of which, M. brevipilosum Meng. et Ren, в род Bioramix Bates, 1879: Bioramix (Leipopleura) 2005 and M. nagquana Meng. et Ren, 2005, are described nagquana (Meng et Ren, 2005), comb. n. Установлена as new. This paper contains the figures with the details of синонимия названий: Bioramix (Leipopleura) micans structure for the majority of species (except M. tadzhika) (Reitter, 1889) = Myatis brevipilosum Meng et Ren, 2005, and photographs of six species, these illustrations allowing syn. n. Обозначены лектотипы Myatis quadraticollis to clearly interpret the author’s concepts of the described Bates, 1879, Myatis variabilis Bates, 1879, Leipopleura taxa. tenuissima Reitter, 1896. Обсуждено положение рода в системе трибы. Приведены современный диагноз рода, Materials and methods подробная характеристика вида M. humeralis. The study is based on the examination of material Introduction from the following institutions: ZIN –Zoological Institute, Russian Academy of The genus Myatis Bates, 1879 belongs to the tribe Sciences, St.-Petersburg, Russia; Platyscelidini [Egorov, 1990] of the family Tenebrionidae. ZMUM – Zoological museum of Moscow State Its representatives are distributed in the Palearctic region in University (collection of A.V. Bogachev), Moscow, Russia; the high mountain systems of Central Asia (Tadzhikistan, HNHM – Hungarian Natural History Museum Northern India, Western China). (Természettudományj Múzeum), Budapest, Hungary; Bates [1879] included three species in the genus ZSM – Zoologische Staatsammlung, München, Myatis: M. humeralis Bates, 1879, M. variabilis Bates, Germany. 1879 and M. quadraticollis Bates, 1879. The type species Also, private collections of I.K. Lopatin and V.A. of this genus was later designated by Gebien [1938]. In Mikhaylov were also used. In total, more than 1400 1896 the species Leipopleura tenuissima Reitter, 1896 was exemplars were studied, including type specimens of the described. Later this name was placed in synonymy with M. four species described in the genus. humeralis Bates, 1879 [Kaszab, 1940]. The key to these three In the morphological descriptions the following described species (made by A. Schuster) were provided in measurements of the body parts were taken (by means Reinig ’s works on the fauna of Pamir-Alai [Reinig, 1931, of binocular-micrometer MBS-10): 1) length of the 1932]. New data about distribution of M. quadraticollis antennomeres without joint parts and their maximum became available after studying of the material of Italian width; 2) length of pronotum along its middle line from expedition in Karakorum [Gridelli, 1934]. Kaszab [1940] anterior margin to base; 3) maximum width of pronotum; in his review of the world fauna of Platyscelidini included 4) length of elytra along suture from base to apex; 5) four species in Myatis (with the new species M. schaeferi). maximum width of elytra; 6) maximum width of tibia on 74 L.V. Egorov 1) dense punctuation – distance between punctures less their diameter; 2) moderately dense – distance between punctures less or equal their diameter; 3) sparse punctuation – distance between punctures exceeding their diameter. Discussion As was briefly shown [Egorov, 2004] , various species, described by Bates [1879] are in fact variants of the one variable species. Thus, the respective synonymy was then proposed (for details see below). I followed Kaszab [1960] in considering M. tadzhika [Bogachev, 1952] ] in the genus Trichomyatis [Egorov, 2006]. As follows from the descriptions, the new species of Myatis described by Chinese authors are rather sharply different from M. humeralis in the structure of the anterior tarsi and tibia of males, in shape of the aedeagus, in the setation (?) of the middle tibia, and in the completely rounded prosternal process. Analysis of the description and figures of M. Fig. 8–10. Myatis humeralis, ♂, details structures. brevipilosum and M. nasquana reveals that these taxa 8 – aedeagus, ventral view; 9 – the same, lateral view; 10 belong to the subgenus Leipopleura Seidlitz, 1893 of the – the same, dorsal view. genus Bioramix Bates, 1879. Moreover, M. brevipilosum in Рис. 8–10. Myatis humeralis, ♂, детали строения. its morphological characteristics and wide distribution is 8 – эдеагус, вентральная сторона; 9 – то же, вид сбоку; 10 – то же, дорсальная сторона. identical to Bioramix (Leipopleura) micans (Reitter, 1889), the latter species in characterized in Kaszab [1940] and the apex; 7) maximum width of tarsi of male; 8) maximum Egorov [1990]. Therefore, the following new synonymy width and length of parameres (taken in dorsal view along is established: Bioramix (Leipopleura) micans (Reitter, middle rove) 9) length of phallobase (taken in lateral view) 1889) = Myatis brevipilosum Meng et Ren, 2005, syn.n. and general length of the aedeagus from apex of parameres Accordingly, the name of other species should be Bioramix to base of phallobase; 10) general length of the body (Leipopleura) nagquana (Meng et Ren, 2005), from base of mandibles to apex of elytra (taken in lateral comb.n. A status of M. schaeferi described from Eastern Tibet view). Density of punctuation characterized as follows: requires clarification. The type specimen (female) of this Fig. 11–15. Myatis humeralis, ♀, details structures. 11 – VIII sternite of abdomen and ventral spicula; 12 – ovipositor, ventral view; 13 – the same, lateral view; 14 – apex of ovipositor, dorsal view; 15 – genital tubes (Gl – gland, Sp – spermatheca, Vag – vagina). Рис. 11–15. Myatis humeralis,♀, детали строения. 11 – VIII стернит брюшка и вентральная спикула; 12 – яйцеклад, вентральная сторона; 13 – то же, вид сбоку; 14 – вершина яйцеклада дорсально; 15 – половые протоки (Gl – железа сперматеки, Sp – сперматека, Vag – вагина). About composition of the genus Myatis Bates, 1879 (Coleoptera, Tenebrionidae, Platyscelidini) 75 species, which I examined is identical to females of some Myatis humeralis Bates, 1879 Bioramix. I was unable to examine males of this species so (Рис. 1-15) far. Position of M. schaeferi in the genus Myatis requires verification too. Myatis humeralis Bates, 1879: 480; Thus, at this time only one species, M. humeralis, is Myatis quadraticollis Bates, 1879: 481; regarded in the genus Myatis. Such volume of this genus Myatis variabilis Bates, 1879: 481; corresponds to its initial concept [Bates, 1879]. Myatis quadraticollis Bates, 1890: 73; Myatis humeralis Bates, 1890: 73, Taf. 2, fig. 18; Myatis Bates, 1879 Myatis variabilis Bates, 1890: 74; Leipopleura tenuissima Reitter, 1896: 174; Myatis Bates, 1879: 480; 1890: 73; Schuster in Reinig, Myatis humeralis: Schuster in Reinig, 1931: 896; 1931: 896; Gebien, 1938: 70; Kaszab, 1940: 899; Егоров, Myatis quadraticollis: Schuster in Reinig, 1931: 896; 2004a: 603; Egorov, 2004b: 659; Meng, Ren, 2005: 104 Myatis variabilis: Schuster in Reinig, 1931: 896; (part.). Myatis quadraticollis: Gridelli, 1934: 65, Taf. 9, fig. 3; Type species: Myatis humeralis Bates, 1879, by Myatis humeralis: Gebien, 1938: 70; subsequent designation [Gebien, 1938: 70]. Myatis quadraticollis: Gebien, 1938: 70; Myatis variabilis: Gebien,