Figure 1 in Towards a phylogeny and evolution of Acochlidia (Mollusca: Gastropoda: Opisthobranchia)

Figure 1. External morphology of living specimens of limnic (A and B) and marine (C–J) Acochlidia. A, Strubellia sp. from Vanuatu (subadult, 2-cm long), with large lateral eyes and a broad foot; B, Acochlidium fijiense from Fiji (2-cm long), note the propodial tentacles and the heart bulb; C, Pseudunela sp. from Vanuatu (3.5-mm long), with long, free posterior foot; D, Asperspina rhopalotecta from Italy (2-mm long), note anterior mantle margin forming a permanent rim; E, Microhedyle glandulifera from Italy (2-mm long), with epidermal glands; F, Paraganitus sp. from Vanuatu (1.5-mm long), with convoluted digestive gland; G, Pontohedyle milaschewitchii from Croatia (3-mm long; ventral view), with head–foot completely retracted into visceral hump; H, P. milaschewitchii from Italy (3-mm long), with short and blunt free posterior foot; I, Hedylopsis spiculifera from Italy, (juvenile, 1-mm long); J, Hedylopsis ballantinei from Egypt (5.5-mm long), note the net-like arrangement of spicules. Abbreviations: dg, digestive gland (shining through the integument); eg, epidermal gland; ey, eye; f, foot; hb, heart bulb; k, kidney (shining through the integument); lt, labial tentacle; mm, anterior mantle margin; pt, propodial tentacle; rh, rhinophore; sp, spicule; vh, visceral hump. A, right view; B–F, I, dorsal view; G, H, ventral view; J, left view.