Graptolithina

Acanthograpsus Spencer, 1878

Selection of related publications
Bulman, O. M. B., Rickards, R. B. 1966. A Revision of Wiman's Dendroid and Tuboid Graptolites. Bulletin of Geological Institutions of the University of Uppsala 43, 6-8, 1-72.
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.
Obut, A., Rytzk, G. 1958. Ordovician and Silurian Dendroidea of Estonia. ENSV TA Geoloogia Instituudi uurimused III, 125-143. Eesti NSV Teaduste Akadeemia Geoloogia Instituudi Uurimused III, pp. 125-143.