Amphilepis patens A museum label B ventral view of two preserved specimens, arms with many short segments, 4-5 arm segments within disk C mouth area before SEM preparation D SEM of mouth area and disk arm segments lightly bleached, triangular oral shields, interbrachial scales, rounded ventral teeth, elongated infradental papillae, 3 scales on oral tentacle pores E SEM of mouth area with rounded ventral teeth, elongated infradental papillae F SEM of disk arm segments with small tentacle pore scales, triangular oral shield, interbrachial scales. Abbreviations: AS – adoral shields, IP – infradental papillae, IS – interbrachial scales, OS – oral shields, TS – tentacle scales, VT – ventral teeth.