Fig. 1 in Untangling the diversity and evolution of tentacles in scallops, oysters, and their relatives (Bivalvia: Pteriomorphia)

Fig. 1 Schematic representations of tentacle position on the mantle margin of pteriomorphian bivalves. Inner fold tentacles (IFT) in b and c, middle fold tentacles (MFT) in d and e. a Transverse section through the bivalve body with the mantle margin exposed, illustrating the mantle folds devoid of tentacles (inset). b Marginal IFT. c Submarginal IFT. d Marginal MFT. e Submarginal MFT. if, inner mantle fold; ma, mantle; mf, middle mantle fold; mm, mantle margin; mt, marginal tentacles; of, outer mantle fold; st, submarginal tentacles