Cryptarcha undata, (OLIVIER, 1790)

Alekseev, Vitaly I. & Bukejs, Andris, 2010, Contributions to the knowledge of beetles (Insecta: Coleoptera) in the Kaliningrad region. 1., Baltic Journal of Coleopterology 10 (2), pp. 157-176 : 164

22. CRYPTARCHA UNDATA (OLIVIER, 1790) Examined material: Recorded from one locality: Bagrationovsk district, near the railway station “ 1312 km ”, 54°33´10´´N 20°9´30´´E, 19.V-08.VI.2009 (1 ex., pitfall trap by the bottom of an oak of three hundred years old, leg. V. Alekseev), 02.VIII-23.VIII.2009 (1 ex., Fageto-Quercetum forest, pitfall trap by the bottom of an old lime, leg. V. Alekseev) .

Comments: This species, which is sporadically but widely distributed in the Baltic region, has been recorded from Finland, Sweden, Norway, Denmark, Latvia and Lithuania ( Silfverberg 2004). The species is considered to be rare in Lithuania ( Ferenca et al. 2006). On the territory of the northern part of the former East Prussia, it has been recorded from Georgenswalde [Otradnoe], Königsberg [Kaliningrad] and Neuhausen [Gur’evsk] ( Bercio & Folwaczny 1979). The beetle occurs and develops in yeast sap and under bark of deciduous trees (primarily oaks).