"Eutrichodesmus armatocaudatus" sp. n., ♂ paratype from cave 4; A, habitus, lateral view; B, midbody segments, lateral view; C, posterior part of body, lateral view; D, midbody segments, ventral view; E, posterior part of body, ventral view; F, telson, ventral view. − Scale bars: A, 1.0 mm, B, C, E, 0.2 mm, D, 0.5 mm & F, 0.1 mm