Abstract
The cystoporate bryozoan Glyptopora michelinia (Prout, 1860) was identified from the latest Visean/earliest Serpukhovian of southern France. This species was known previously from the Mississippian of the USA and southwestern Spain. The morphology of the genus Glyptopora includes the development of bilaminate lobes. Such morphology became successful in several groups of cystoporate bryozoans and was regarded as efficient adaptation for feeding. Another explanation would be control by the type of substrate which enabled temporal success of lobate species against the encrusting ones in the Late Palaeozoic.
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