A taxonomic revision of Limnobaris Bedel in the strict sense (Coleoptera, Curculionidae, Baridinae), with particular emphasis on the species found in China

Abstract

The genus name Limnobaris Bedel is applied in a restricted sense to baridine weevils with a covered pygidium and non-prominent, decussate mandibles which occur on sedges in the Palaearctic Region and immediately adjacent parts of tropical Southeast Asia. Calyptopygus Marshall and Pertorcus Voss are syn. n. of Limnobaris. Some species from Africa and the Americas are maintained provisionally in Limnobaris in the widest sense but will need to be transferred to other genera in future studies. A total of eleven species is recognized in Asia, two of which are widespread and occur also in the Western Palaearctic Region. Limnobaris martensi Korotyaev sp. n. is described from Nepal. Pertorcus tibialis basalis Voss is raised to species rank, as L. basalis (stat. prom.). New or reestablished synonyms are L. dolorosa (Goeze) (= L. jucunda Reitter, = L. koltzei Reitter), L. tibialis (Voss) (= Pertorcus tibialis pilifer Voss) and L. t-album (Linnaeus) (= L. bedeli Reitter, = Baridius crocopelmus Gyllenhal, = L. sahlbergi Reitter, = L. scutellaris Reitter, = Baris t-album sculpturata Faust). Calandra uniseriata Dufour is considered a junior synonym of Sitophilus oryzae (L.) (syn. n.). A key for identification and a distribution map are provided.

<h1>An annotated checklist of supertribe Bariditae Schönherr, 1833 (Coleoptera, Curculionidae, Conoderinae) in southeastern Baltic region</h1>

“…External sexual dimorphism is inconspicuous with male rostrum comparatively shorter, thicker, and stronger curved. As stated by Prena et al (2014b), the most reliable way to distinguish L. dolorosa from L. t-album is by the shape of aedeagus, which is distinctly shorter and wider in L. dolorosa (Figure 1: C and D). Published local records.…”

“…Identification. Adults of two Western Palaearctic species, L. dolorosa and L. t-album, are characterized by the presence of dense whitish or yellowish squamiform setae on lateral parts of mesoand metathorax, and abdomen (Prena et al 2014b). The most reliable distinguishing external character for L. dolorosa is the density of punctures and vestiture on intervening spaces on elytra, which both are much denser compared to L. t-album (Arnoldi et al 1965;Smreczyński 1974) (Figure 1: A and B).…”

“…The most reliable distinguishing external character for L. dolorosa is the density of punctures and vestiture on intervening spaces on elytra, which both are much denser compared to L. t-album (Arnoldi et al 1965;Smreczyński 1974) (Figure 1: A and B). Also, L. dolorosa often has comparatively denser ventrolateral vestiture (Prena et al 2014b). The setation of dorsum and the arrangement of white ventrolateral scales are not always reliable diagnostic features due to the high grade of interspecific variation (Lohse 1983).…”

“…The examined specimens have been identified by the authors using the keys provided by , Smreczyński (1974), Lohse (1983), andPrena et al (2014b). The classification follows the catalogue of Palaearctic Curculionoidea (Alonso-Zarazaga et al 2023).…”

“…This species is widely distributed throughout the Palaearctic Region, from the British Islands to the Russian Far East (Legalov 2020;Alonso-Zarazaga et al 2023). The northern boundary of the distribution range extends northwards to 69°N in Finland (Rassi et al 2015); the southern range extent passes through Italy, Croatia, Bulgaria, Turkey, Uzbekistan, northern Mongolia, north-eastern China, and South Korea (Prena et al 2014b;Alonso-Zarazaga et al 2023). Limnobaris dolorosa is widely distributed in the north-eastern Caucasus (Izmailova et al 2007), however, not yet recorded from Transcaucasia.…”