Sinistral Species of Vertigo
Vertigo pusilla Müller,1774
Description: Larger and wider species (2.0 x 1.1 mm.); 6 - 9 very prominent apertural teeth almost filling the aperture; sculpture smooth with irregular growth lines.
Habitat: Rather dry places: rocks, stone walls, ground litter in open woodland, hedge banks, occasionally in sand dunes.
Vertigo angustior Jeffreys, 1830
Description: Smaller and narrower species (1.8 x 0.9 mm); 5 - 6 apertural teeth NOT almost filling the aperture; the palatal tooth being long and lamella-like; sculpture fine and regular
Habitat: Very wet permanently marshy grassland; among moss in wet hollows in sand dunes.