Taxonomic Study of the Genus Ceutorhynchoides Colonnelli, 1979 from Japan, with Establishment of an Allied New Genus (Coleoptera: Curculionidae: Ceutorhynchinae)

Abstract

The genus Ceutorhynchoides Colonnelli (Ceutorhynchini, Ceutorhynchinae) is recorded for the first time from Japan, with descriptions of two new species: C. squamatus sp. nov. (Ryukyus) and C. styracis sp. nov. (Honshu, Shikoku, and Kyushu). In addition, Hainokisaruzo gen. nov., which is related to Ceutorhynchoides, is established for three Japanese species: H. japonicus sp. nov. (type species; Honshu and Kyushu), H. nipponensis (Hustache), comb. nov. (Honshu and Kyushu), and H. infuscatus sp. nov. (Honshu, Shikoku, Kyushu, and Ryukyus). Based on morphological reason, Ceutorhynchoides bengalensis Colonnelli, C. subcostulatus Oriental Region are transferred Colonnelli, C. notatus Colonnelli, C. topali (Hustache) , and C. sinensis Korotyaev from the to Hainokisaruzo (comb, nov.). A key to species, habitus photographs, and illustrations and SEM photographs of important charac- ters are provided for the Japanese species of both genera. The following host association records are also given in this paper: Ceutorhynchoides styracis with Styrax japonica Siebold et Zuccarini (Styracaceae) , Hainokisaruzo japonicus with Symplocos glauca (Thunberg) Koidzumi (Symplocaceae) , and H. nipponensis with Symplocos chinensis (Loureiro) Druce (Symplocaceae).