8
2
July
199
203
ELLIOTT, G. F. 1965. The interrelationships of some Cretaceous Codiaceae (calcareous algae). Palaeontology, 8, 2, 199–203.
Graham F. Elliott The anatomy and evolution of fossil codiacean calcareous algae referred to Arabicodium and Boueina (Jurassic-Cretaceous) and Halimeda (Upper Cretaceous-Recent) are discussed. It is considered that all are referable to one botanical genus Halimeda; differentiation of the earlier species-groups (Boueina and Arabicodium) was followed by hybridization and selection in the Upper Cretaceous, leading to Halimeda s.str., a group of species of more vigorous growth and showing a combination of characters from the older species-groups. The Palaeontological Association (Free Access)