Fig. 12
From: A review of the genus Muusoctopus (Cephalopoda: Octopoda) from Arctic waters
Muusoctopus johnsonianus (Allcock, Strugnell, Ruggiero & Collins, 2006) [26]. Beak and radula. BIOICE -3520–2 (late maturing female, mantle length 89 mm, off Iceland): upper (a) and lower (c) beak, and unworn section of radula (b). Scale bars: a, c = 1 mm, b = 100 µm. Abbreviations: l1, first lateral tooth; l2, second lateral tooth; m, marginal tooth; r, rachidian tooth