Fig. 17
From: A review of the genus Muusoctopus (Cephalopoda: Octopoda) from Arctic waters
Muusoctopus sibiricus (Løyning, 1930) [62]. Hectocotylus and male reproductive anatomy. a, ESS-A-19 (mature male, mantle length (ML) 39 mm, the East-Siberian Sea): hectocotylus; b–d, LS-L-3 (pre-spent male, ML 38 mm, the Laptev Sea): hectocotylus (b), spermatophoric complex (c), dissected, ventral view, and spermatophore (d). Scale bars: a, b, d = 1 mm, c = 5 mm. Abbreviations: ag, accessory gland; ca, calamus; cb, cement body, di, diverticulum; ea, ejaculatory apparatus; he, head; sd, sperm duct; sg, spermatophoric glands; sr, seminal reservoir; ss, spermatophoric sac; te, testis; th, thread; to, terminal organ