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Xylolaemus sakhnovi
''Xylolaemus sakhnovi'' is an extinct species of cylindrical bark beetle in the family Zopheridae. The species is solely known from the Middle Eocene〔 Baltic amber deposits in the Baltic Sea region of Europe. The genus ''Xylolaemus'' contains a total of six extant species distributed from western Europe through the Canary Islands and North Africa to India. The species is the first in the genus to be described from a fossil specimen.〔
==History and classification==
''Xylolaemus sakhnovi'' is known from a single fossil insect which is an inclusion in a transparent chunk of Baltic amber. The amber specimen contains the beetle imago along with a number of ''Quercus'' stellate hairs and a partial aphid. When the fossil was described it was part of a private collection, with the intent that it would be donated to the Paleontological Institute, Russian Academy of Science. The amber was recovered from fossil bearing rocks in the Kaliningrad region of Russia.〔 Estimates of the age date between 37 million years old, for the youngest sediments and 48 million years old. This age range straddles the middle Eocene, ranging from near the beginning of the Lutetian to the beginning of the Pribonian. The holotype was first studied by researchers Vitaly I. Alekseev of Kaliningrad State Technical University and Nathan P. Lord of Brigham Young University. Alekseev and Lord's 2014 type description of the species was published in the entomology journal ''Baltic Journal of Coleopterology''. The specific epithet ''sakhnovi'' was coined as a patronym in honor of Nikolay I. Sakhnov, an entomologist and animal painter from the Kaliningrad region.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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