Fig. 5. SEM micrographof planed and etched I2 in Single origin of Malagasy Carnivora from an African ancestor.

Fig. 5. SEM micrographof planed and etched I2 enamel of Plagiaulacinae gen. et sp. indet. DORCM GS 8, Purbeck Limestone Formation (from Fosse et al. 1991). There are numerous large round, barnacle−like structures varying in form and size, eachseemingly consisting of crystals converging to − ward the outer enamel surface and surrounding an often slit−like opening from which a filamentous structure may protrude. Between them are much smaller circular crystal aggregates. Scale bar 10 µm.