BASAL LAOPHONTID EVOLUTION 



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Fig. 1 Esola bulbifera (Norman, 191 1) ( 9). A, Habitus, dorsal; B, habitus, lateral [anteroventral cup-shaped pore arrowed]; C, urosome (excluding PS- 

 bearing somite), lateral; D, anal somite and caudal rami, dorsal. 



