Zootaxa 4941 (4): 587–593 ISSN 1175-5326 (print edition) https://www.mapress.com/j/zt/ Correspondence ZOOTAXA Copyright © 2021 Magnolia Press ISSN 1175-5334 (online edition) https://doi.org/10.11646/zootaxa.4941.4.8 http://zoobank.org/urn:lsid:zoobank.org:pub:073AFF56-749C-49C5-84CA-2F431A0AD1B4 Studies on Ramulus ussurianus (Bey-Bienko, 1960) (Phasmida: Phasmatidae) SERGEY YU. STOROZHENKO1 & TAEWOO KIM2 1Federal Scientific Center of the East Asia Terrestrial Biodiversity, Far Eastern Branch of the Russian Academy of Sciences, Vladivo- stok, 690022, Russia. �
[email protected]; https://orcid.org/0000-0001-9269-4043 2National Institute of Biological Resources, Hwangyeong-no 42, Seo-gu, Incheon, 22689, South Korea. �
[email protected]; https://orcid.org/0000-0002-3387-6370 The phasmid genus Ramulus Saussure, 1862 belongs to the nominotypical tribe of subfamily Clitumninae of the Phas- matidae. This genus consists of 159 species distributed in India (21 species), Sri Lanka (6 species), Bhutan (1 species), Myanmar (6 species), Thailand (1 species), Vietnam (12 species), Malaysia (4 species from Peninsular part and Borneo), Indonesia (18 species from Java, Sumatra, Borneo, Sulawesi, and Key islands), the Philippines (3 species), China includ- ing Taiwan (74 species), Japan (1 species), Korea (1 species), and Russia (1 species) (Brock et al., 2021). Three phasmid species have been described in the genus Baculum Saussure, 1861 from the Russian Far East, Korea and North-East China respectively (Bey-Bienko, 1960; Kwon et al., 1992; Chen & He, 1994) and later transferred to the genus Ramulus (Otte & Brock, 2005). As a result of detailed examination of the type specimens of Ramulus ussurianus (Bey-Bienko, 1960), additional material and descriptions of these species, it became clear that specimens from Russia, Korea and North-East China are conspecific.