A new graptolite, intermediate between the Tuboidea and the Camaroidea
Piotr Mierzejewski
A new tuboid graptolite, Camarotubus graptocamaraeformis gen. et sp.n., is described from a calcareous erratic boulder of middle Ordovician (Caradoc?) age from Poland. This encrusting form combines characters of both the tuboid and the camaroid graptolites, and is regarded as a purely morphological intermediate between them. This finding supports Kozłowski's (1949) concept of a close phylogenetic relationship between the orders Tuboidea and Camaroidea.
Key words: Graptolithina, Camaroidea, Tuboidea, evolution, Ordovician, erratic boulders, Poland.
Piotr Mierzejewski [mierzejewski@post.pl], Instytut Paleobiologii PAN, ul. Twarda 51/55, PL-00-818 Warszawa, Poland. Present address: ul. Filtrowa 83 m. 49, PL-02-032 Warszawa, Poland.
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