Acta Palaeontologica Polonica

Nature of graptovermids (Graptolithina)

Piotr Mierzejewski

Acta Palaeontologica Polonica 33 (3), 1988: 267-272

Graptovermlds are redefined as resting terminal portiom of unknown encrusting graptolites stolothecae. Presumably, their biological significance was an adaptation allowing to survive the periods of unfavourable or adverse conditions. SEM observations are made on Graptovermis intestinalis Kozlowski, 1949 from the lower Ordovician of Oland (Sweden).

Key words: graptolites, taxonomy, Ordovician, Sweden

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