Zabaluev I.A. 2025. Taxonomy, biology and immature stages of the little-known weevil Pseudorchestes (Labiorchestes subgen.n.) stobieckii (Smreczyński, 1957) comb.n. (Coleoptera: Curculionidae: Rhamphini) // Russian Entomol. J. Vol.34. No.1: 82–92 [in English].
Zoological Museum of Moscow Lomonosov State University, Bol'shaya Nikitskaya 2, Moscow 125009 Russia.
Ilya Zabaluev: fatsiccor66@mail.ru ORCID https://orcid.org/0000-0002-1558-5502
doi: 10.15298/rusentj.34.1.08
ABSTRACT. For the weevil currently known as Orchestes stobieckii (Smreczyński, 1957), the host plant Nepeta nuda L. (Lamiaceae) is identified for the first time, the biology and immature stages are described, the morphological characters of the adults are illustrated in detail, including the first images of the genitals and terminalia of the male and female. It is proposed to transfer this species from the genus Orchestes to the genus Pseudorchestes, where it will be placed to a separate monotypic subgenus Labiorchestes subgen.n. since it is clearly distinguished from other Pseudorchestes by the absence of an uncus on pro- and mesotibiae, the presence of two long spines on mesofemora, an elongated the antennal scapus, a noticeably more distal position of the antennae on the rostrum, but at the same time has a similar structure of the male and female genitals, hind legs, similar dorsal pubescence of the body, as well as the structure of the immature stages and biology. In addition, this species is first recorded for the Lipetsk Region.
KEY WORDS: larvae, pupae, immature stages, Rhamphini, Pseudorchestes, Orchestes, Nepeta nuda, Lamiaceae.