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.
Highlights
Baridinae are hyperdiverse, oligophagous weevils with a worldwide distribution
Bedel (1885) was the first to place two Western Palaearctic species in a separate genus named Limnobaris Bedel, which differs from other European baridines by having the pygidium completely covered by the elytral apices
This simple but useful character was accepted readily by contemporary entomologists: Reitter (1888) honored Bedel for his keen observation with the patronym Limnobaris bedeli; Casey (1892) adopted the concept for Nearctic species, Hartmann (1904) for an African species and Faust (1896), Champion (1908, 1909) and Hustache (1932) for Neotropical species. This worldwide concept no longer functioned when Casey (1920, 1922) applied new generic names to North American and Brazilian species in his private collection but ignored many others not immediately available to him. In addition to these still existing but obsolete generic placements, further problems have evolved around certain East Asian species, which currently are placed in three genera
Summary
Oligophagous weevils with a worldwide distribution. Many are uniformly oblong-ovate and notoriously poor in taxonomically useful characters. Bedel (1885) was the first to place two Western Palaearctic species in a separate genus named Limnobaris Bedel, which differs from other European baridines by having the pygidium completely covered by the elytral apices This simple but useful character was accepted readily by contemporary entomologists: Reitter (1888) honored Bedel for his keen observation with the patronym Limnobaris bedeli; Casey (1892) adopted the concept for Nearctic species, Hartmann (1904) for an African species and Faust (1896), Champion (1908, 1909) and Hustache (1932) for Neotropical species. The primary objective of this study is to resolve the taxonomic conflict in the current usage of the names Limnobaris, Calyptopygus and Pertorcus, and to provide a means for the identification of the species likely to be found in China As this covers almost all known species of the genus in the restricted sense
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