Clethrionomys glareolus (Schreber, 1780) . Die Säugethiere, 4:680.

TYPE LOCALITY: Denmark, Lolland Island .

DISTRIBUTION: Forests of W Palaearctic from France and Scandinavia to Lake Baikal, south to N Spain, N Italy (isolated montane populations farther south), the Balkans (but not most of Greece), W Turkey, N Kazakhstan and the Altai and Sayan Mtns; also occurs on Britain and SW Ireland (see Corbet, 1978c, and Viro and Niethammer, 1982:117).

SYNONYMS: alstoni, bernisi, bosniensis, britannicus, caesarius, cantueli, curdo, devius, erica, fulvus, garganicus, gorka, hallucalis, helveticus, hercynicus, insulaebellae, intermedius, istericus, italicus, jurassicus, makedonicus, minor, nageri, norvegicus, ognevi, petrovi, pirinus, ponticus, pratensis, reinwaldti, riparia, rubidus, rufescens, ruttneri, saianicus, sibericus, skomerensis, sobrus, suecicus, tomensis, variscicus, vasconiae, vesanus, wasjuganensis.

COMMENTS: European populations reviewed by Viro and Niethammer (1982). Analysis of evolutionary relationships among British samples was reported by Steven (1953), biochemical differentiation among populations over short geographic distances was presented by Leitner and Hartl (1988). Evolutionary significance in morphology of third upper molar in extant and fossil samples analyzed by Bauchau and Chaline (1987).