Graptolithina

Amplexograptus Elles et Wood, 1907

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
Suyarkova, A. A., Koren', T. N. 2009. Advances in the Ordovician graptolite biostratigraphy of the St Petersburg area, Russia. Estonian Journal of Earth Sciences 58, 1, 3-9. DOI:10.313176/earth.2009.1.01
Pålsson, C. 2001. Graptolites from the Upper Ordovician Dicranograptus clingani Zone at Järrestad, Scania, southern Sweden. GFF 123, 4, 217-224. DOI:10.1080/11035890101234217
Jaanusson, V. 1995. Confacies differentiation and upper Middle Ordovician correlation in the Baltoscandian basin. Proceedings of the Estonian Academy of Sciences. Geology 44, 2, 73-86.
Tzaj, D. T. 1976. Graptolity srednego ordovika Kazahstana.
Jaanusson, V., Skoglund, R. 1963. Graptoloids from the Viruan (Ordovician) Dalby and Skagen Limestones of Västergötland. GFF 85, 3, 341-357. DOI:10.1080/11035896309452966