Graptolithina

Parvitubus Skevington, 1963

Selection of related publications
Skevington, D. 1963. Graptolites from the Ontikan Limestones (Ordovician) of Öland, Sweden. I: Dendroidea, Tuboidea, Camaroidea, and Stolonoidea. Bulletin of Geological Institutions of the University of Uppsala 42, 1-62.
References based on distribution