. Bats of Portugal : zoogeography and systematics. Bats -- Portugal. 14 MISCELLANEOUS PUBLICATIONS Genus Myotis This very large group includes about 90 spe- cies and is the most widespread of all bat genera; seven species are known in Portugal: M. myotis, M. blythii, M. bechsteinii, M. nattereri, M. emarginatus, M. daubentonii, and M. mystac- inus. M. nathalinae may also occur (see discus- sion under M. daubentonii). These species tradi- tionally have been divided into three subgenera: Myotis, Leuconoe, and Selysius (Lanza, 1959). The size range of the species in Portugal is large, but all are
. Bats of Portugal : zoogeography and systematics. Bats -- Portugal. 14 MISCELLANEOUS PUBLICATIONS Genus Myotis This very large group includes about 90 spe- cies and is the most widespread of all bat genera; seven species are known in Portugal: M. myotis, M. blythii, M. bechsteinii, M. nattereri, M. emarginatus, M. daubentonii, and M. mystac- inus. M. nathalinae may also occur (see discus- sion under M. daubentonii). These species tradi- tionally have been divided into three subgenera: Myotis, Leuconoe, and Selysius (Lanza, 1959). The size range of the species in Portugal is large, but all are lightly built. The muzzle is fairly narrow and the ears quite slender. The well- developed tragus (at least half as high as the external ear) is lanceolate and quite pointed (Fig. 15), which distinguishes this genus from other European bats. Myotis has the greatest number of teeth known in the Chiroptera, being the only European genus with three well-developed upper premolars: I 2/3, C 1/1, P 3/3, M 3/3 = 38. KEY TO THE SPECIES OF MYOTIS KNOWN FROM IBERIA Based on External Characters.— 1. Forearm longer than 50 mm 2 1'. Forearm shorter than 46 mm 3 2. Ear longer than 24 mm; tail (measured from anus) usually shorter than forearm M. myotis (p. 16) 2'. Ear shorter than 26 mm; tail (measured from anus) usually longer than forearm M. blythii (p. 17) 3. Ear longer than half the length of forearm (more than 22 mm) M. bechsteinii (p. 23) 3'. Ear shorter than half the length of forearm (less than 20 mm) 4 4. Calcar bordering about l/i of the uropatagium; foot shorter than xh the length of tibia 5 4'. Calcar bordering about 2/3 of uropatagium; foot usually about as long as Vi the length of tibia 8 5. Uropatagium bordered by a fringe of stiff hairs, about 1 mm long; no pronounced notch on the outer edge of ear M. nattereri (p. 22) 5'. No stiff hairs bordering uropatagium; clear notch on outer edge of ear 6 6. Very pronounced notch on the distal half of outer edge of ear (Fig. 17); ears
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