Graptolithina

Diplograptina Lapworth, 1880

Selection of related publications
Goldman, D., Nõlvak, J. Maletz, J. 2015. Middle to Late Ordovician graptolite and chitinozoan biostratigraphy of the Kandava-25 drill core in western Latvia. GFF 137, 3, 197-211. DOI:10.1080/11035897.2015.1021375
Ulst, R. 1975. Graptolites from Upper Ordovician Fjäcka Member of Middle Baltic. The Fauna and Stratigraphy of Paleozoic and Mesozoic of Baltic and Byelorussia, pp. 69-84.