Roeseliana pylnovi ( Uvarov, 1924 )

Massa, Bruno, Tagliavia, Marcello, Buzzetti, Filippo Maria, Fontana, Paolo, Carotti, Giovanni, Bardiani, Marco, Leandri, Fausto, Scherini, Roberto & Verde, Gabriella Lo, 2023, A taxonomic revision of the Palaearctic genus Roeseliana (Orthoptera: Tettigoniidae: Tettigoniinae: Platycleidini): a case of ongoing Mediterranean speciation, Zootaxa 5270 (3), pp. 351-400 : 363

Roeseliana pylnovi ( Uvarov, 1924)

Figs. 1e, 1f , 3h , 6d , 8a , 10

Uvarov 1924. Trans. R. Entomol. Soc. London, 71(3–4): 534 ( Metrioptera pylnovi ); type locality and depository: Caucasus ( UMO, Oxford) .

Material examined. Armenia, Tavush, Dilijan 6.VII.2005, M. Kalashian (5♁, 6♀) ( BMPC) ; Georgia, Caucasus, Bakuriany 5–10.IX.1912, E. Konig (1♁, 1♀ paratypes) ( NHM) (photographed by R. Felix) ; Georgia, Lake Bazeleti 29.VI.2003, P. Fontana, F. Buzzetti & B. Massa (1♁) ; Georgia, Ananouri 20.VI.2003, P. Fontana, F. Buzzetti & B. Massa (1♁) ( BMPC).

Remarks. Described in the genus Metrioptera by Uvarov (1924), it was transferred to the genus Roeseliana by Zeuner (1941). Following Tarbinsky (1932) it is synonymous with R. fedtschenkoi , but Zeuner (1941) listed it as valid species. Ramme (1951) considered R. pylnovi and R. fedtschenkoi different taxa, with different shape of wings. Ĝtz (1969) pointed out that the subgenital plate of female is more incised than that of R. fedtschenkoi , but he did not list specimens of the latter species.

It seems that R. pylnovi is much related to R. fedtschenkoi and R. roeselii . However, titillators are different from those of R. roeselii ( Fig. 6 ). Instead, the supra-anal plate and cerci of the male are a slightly similar to those of R. roeselii ( Fig. 6d ), however, differences may be detected with the female subgenital plate, which in R. roeselii is laterally more rounded ( Figs. 8a and 8b ). See also Tables 2 and 4 .

Distribution. Caucasian region.

Figures

FIGURE 1. Ovipositor of five taxa of Roeseliana in lateral view. In 1c the method to take three measures of the depth of the ovipositor (named “ovipositor depth” in the text) is explained.

FIGURE 3. Stridulatory file under the left tegmen of some taxa of Roeseliana.

FIGURE 6. Dorsal view of the male supragenital plate and cerci of four taxa of Roeseliana.

FIGURE 8. Ventral view of the female subgenital plate of six taxa of Roeseliana.

FIGURE 10. Habitus of five taxa of the genus Roeseliana.