Evolution of Janthina and Recluzia (Mollusca: Gastropoda: Epitoniidae)
Tate, Grange Burn Fm, Kalimnan (Zanclean
Tate, Grange Burn Fm, Kalimnan (Zanclean, 1893)
Figure 4 (facing page 129). Living animals in aquaria. (A) Janthina janthina (Linnaeus) (centre) and J. pallida Thomson (left, and part of another float at right) together, showing different bubble sizes in floats, and J. janthina feeding on pink eggs of J. pallida beneath float; collected at Arina Beach, Heraklion, Crete. (B) Janthina janthina, collected on beach in northern New South Wales, Australia, clearly showing forked cephalic tentacles;(C–E) Janthina janthina, all data as for Fig.4A; C, showing forked cephalic tentacles, lack of eyes, and teeth and odontophore protruding from mouth at end of extended snout; D–E, showing extended head and snout, odontophore visible in mouth, and partially expanded right epipodium lying over shell (A, C–E, reproduced with permission of Dimitris Poursanidis, Heraklion, Crete; B, reproduced with permission of Denis Riek, Brunswick Heads, New South Wales). Scale bars 10 mm.
Figure 5. (See facing page 131 for caption).