Two new species of Electra (Bryozoa, Cheilostomata) from the Miocene of the Aquitaine Basin, France |
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Authors: | Elena Nikulina |
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Affiliation: | a Geologisch-Paläontologisches Institut, Christian Albrechts Universität zu Kiel, Olshausenstrasse 40, 24118 Kiel, Germany b Department of Palaeontology, Natural History Museum, Cromwell Road, London SW7 5BD, United Kingdom |
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Abstract: | Post-Cretaceous examples of Electridae, a primitive family of cheilostome bryozoans, are poorly represented in the fossil record, probably because of their thinly calcified zooids and preference for nearshore environments. Two new electrid species are here described from the Lower Miocene (Burdigalian) of Pontpourquey, Aquitaine, France: Electra triaurata nov. sp. and Electra aquitanica nov. sp. Both species belong to extant species groups, the E. indica and E. biscuta groups, respectively, that presently occur in the Indo-Pacific; both are the only fossil examples of these species groups. Whereas E. triaurata nov. sp. has uniserial colonies, zooids with porous gymnocysts, three flattened spines and basal windows allowing etching of the substrate to produce the trace fossil Leptichnus, E. aquitanica nov. sp. has multiserial colonies and zooids with a proximal gymnocyst bearing 2 to 5 spines. |
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Keywords: | Cheilostomata Miocene Taxonomy Morphology New species Aquitaine Basin |
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