Halimeda sp. 1

Schlagintweit, Felix & Wilmsen, Markus, 2014, Calcareous Algae (Dasycladales, Udoteaceae) From The Cenomanian Altamira Formation Of Northern Cantabria, Spain, Acta Palaeontologica Romaniae 10 (1 - 2), pp. 1-2 : 21

Halimeda sp. 1

Figs. 9 a-c

Halimeda sp. 2

Fig. 9d

Remarks: Halimeda sp. 1 and sp. 2 are separated mainly on the base of their utricle structure. In Halimeda sp. 1 , the cortex consists of large subconical primary utricles bearing short bulbous higher order utricles.

The utricles are arranged more or less perpendicular to the well calcified medulla. In Halimeda sp. 2 , the utricles of the cortex are slender and bended towards the medulla. The preservation of the material is insufficient for specific assignment and biometric measurements. The medullary zone is generally well calcified in Halimeda sp. 1 and poorly calcified in the specimen of Halimeda sp. 2 . Whether this is a just an accidental observation is unknown.

Figures

Fig. 9 Udoteacean algae from the Cenomanian of Cantabria, Spain. a-c Halimeda sp. 1, associated with orbitolinids (o), trocholinids (t) and Marinella lugeoni Pfender (M) (a). d Halimeda sp. 2. Thin-sections: Co 35 (a), LR 110 (bc), S 133 (d).