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30-Apr-2019 17:47

Heydrichia; Sporolithaceae; Sporolithon; fossil coralline red algae; Brazil; Switzerland; Hauterivian; Albian; Cenomanian. Toutes les reprsentants modernes du genre Heydrichia n'ont t observs que dans l'hmisphre sud. The Order Sporolithales differs from the related Order Corallinales in producing tetrasporangia in calcified compartments rather than in conceptacles, and in having cruciate rather than zonately arranged tetraspores ( et al., 2010).

Heydrichia ; Sporolithaceae ; Sporolithon ; algues rouges corallines fossiles ; Brsil ; Suisse ; Hauterivien ; Albien ; Cnomanien. Both Orders include fossil and non-fossil genera and species.

We also have discovered additional material referable to Heydrichia in thin sections of Albian age material (c. An account of the species based on thin sections (Fig.

100.5-113 ± 1 Ma) at two localities in the Riachuelo Formation, Sergipe Basin, north-eastern Brazil. 1 ) from the three known localities is provided, and the palaeontological and biological implications are discussed, including the matter of whether apparent sporangial complexes in which involucres have not been preserved could instead be trace fossils produced by micro-borers.

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