The geographic range of Tragosoma depsarium (Linnaeus, 1767) (Coleoptera, Cerambycidae) in the Palaearctic

Nikolay S Anisimov,Vitaly G Bezborodov

doi:10.15560/17.3.841

Abstract

The geographic range of the rare coleopteran Tragosoma depsarium (Linnaeus, 1767) is summarized, and the Eurasian distribution is mapped for the first time. Particular attention is paid to the eastern Palaearctic part of the species&rsquo; range, where dubious data prevail. Distributional data from the Russian Far East have been published, but not confirmed, are considered, and new records of this species in Eastern Siberia are reported.&nbsp;

Highlights

Tragosoma depsarium (Linnaeus, 1767) is the sole species of the genus Tragosoma Audinet-Serville, 1832 and the tribe Meroscelisini J
Tragosoma depsarium prefers coniferous forests where the proportion of mature trees is more than 25%, lighting conditions are good and stand density is low, and there is considerable dry, windfallen pines or spruces having a large diameter and no bark
The range of Tragosoma depsarium can be conditionally subdivided into two parts: the European one, which includes the European countries and Russia stretching as far as the Ural Mountains, and the Asian one, including only Siberia, where the easternmost limits of the species’ range are insufficiently known

Summary

Introduction

Tragosoma depsarium (Linnaeus, 1767) is the sole species of the genus Tragosoma Audinet-Serville, 1832 and the tribe Meroscelisini J. Throughout its entire range, T. depsarium is rarely and sporadically found Tragosoma depsarium prefers coniferous forests where the proportion of mature trees is more than 25%, lighting conditions are good and stand density is low, and there is considerable dry, windfallen pines or spruces having a large diameter and no bark. Soil under these trees should have an optimal moisture content, which is important for symbiotic fungi (Wikars 2003, 2004). We publish for the first time data on the easternmost record of T. depsarium, which we confirmed by the study of the actual material. Data on the age of the records are graphically shown on the maps

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