. Bats of Portugal : zoogeography and systematics. Bats -- Portugal. 36 MISCELLANEOUS PUBLICATIONS mens were mist-netted at a mountain site over 1,000 meters in elevation. It is still not known whether P. auritus in Portugal is restricted to similar cold montane enclaves; its presence in the lowlands of northern Portugal is also possible. P. auritus usually spends the summer in buildings and tree cavities and winters in caves ( Kowalski and Ruprecht, 1981; Saint Girons, 1973). Morphology and Taxonomic Remarks.—P. auritus is a small bat (Table 21) averaging slightly smaller than P. austriac
. Bats of Portugal : zoogeography and systematics. Bats -- Portugal. 36 MISCELLANEOUS PUBLICATIONS mens were mist-netted at a mountain site over 1,000 meters in elevation. It is still not known whether P. auritus in Portugal is restricted to similar cold montane enclaves; its presence in the lowlands of northern Portugal is also possible. P. auritus usually spends the summer in buildings and tree cavities and winters in caves ( Kowalski and Ruprecht, 1981; Saint Girons, 1973). Morphology and Taxonomic Remarks.—P. auritus is a small bat (Table 21) averaging slightly smaller than P. austriacus (Table 22). The genus Plecotus has a very distinct morphol- ogy, but confusion between these two very simi- lar species in Europe is possible; a thorough comparison with morphological descriptions of both species should be part of any identification (see key). The upper parts oiP. auritus are gray- ish-brown, the under parts are light yellowish and partly translucent; the face is light brown. The dentition is less robust than that of P. austri- acus, but the canines of P. auritus are compara- tively less developed while the first upper premo- lars are proportionally larger than those of P. austriacus. The anular process of the mandible is blunt whereas that of P. austriacus is more pointed (Fig. 35). In the latter species a distinct "horn" is present medially on the dorsal side of the angular process; in P. auritus this is absent or reduced (Fig. 35). Various morphometric charac- ters have been used to distinguish between the two species. However, most of these are not applicable to Portuguese specimens of Plecotus. In fact the only two known P. auritus from Por- Table 21. Measurements of two Plecotus auritus from 9JP165 <?JP 166 Length of Forearm Condylobasal Length Zygomatic Breadth Mastoid Breadth Breadth of Braincase — C-M3 Length Maxillary C-C Breadth Maxillary M-M Breadth Length of
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