Ptychopariida Swinnerton, 1915
Selection of related publications
Żylińska, A., Weidner, T., Ahlgren, J., Ahlberg, P. 2015. Exotic trilobites from the uppermost Cambrian Series 3 and lower Furongian of Sweden. Acta Geologica Polonica 65, 1, 21-67. DOI:10.1515/agp-2015-0002
Rasmussen, B. W., Nielsen, A. T., Schovsbo, N. H. 2015. Faunal succession in the upper Cambrian (Furongian) Leptoplastus Superzone at Slemmestad, southern Norway. Norwegian Journal of Geology 95, 1, 1-22. DOI:10.17850/njg95-1-01
Pärnaste, H., Bergström, J., Zhou, Z.-Y. 2013. High-resolution trilobite stratigraphy of the Lower-Middle Ordovician Öland Series of Baltoscandia. Geological Magazine 150, 3, 509–518. DOI:10.1017/S0016756812000908
Pärnaste, H., Bergström, J. 2013. The asaphid trilobite fauna: Its rise and fall in Baltica. Palaeogeography, Palaeoclimatology, Palaeoecology 389, 64-77. DOI:10.1016/j.palaeo.2013.06.007
Bird, C., Clarkson, E. 2003. Observations on the ontogeny of the upper Cambrian trilobite Peltura scarabaeoides westergaardi Henningsmoen, 1957. GFF 125, 4, 177-190. DOI:10.1080/11035890301254177
Månsson, K. 1998. Middle Ordovician olenid trilobites (Triarthrus Green and Porterfieldia Cooper) from Jämtland, central Sweden. pp. 47-62. DOI:10.1017/S0263593300002352
Melnikov, S. A. 1995. New trilobites from the Lower/Middle Ordovician boundary Deposits in Leningrad oblast. Paleontologicheski Zhurnal 4, 131-135.
Balashova, E. A., Korkutis, V. A. 1970. On the first find of the Upper Cambrian trilobite in the Tyskre suite of the Baltic area.Palaeontology and Stratigraphy of the Baltic and the Byelorussia. Number II , pp. 341-344. Mintis.
Männil, Ralf 1963. The biostratigraphic subdivision of the Ordovician strata in Western Latvia. ENSV TA Geoloogia Instituudi uurimused XIII, 41-74.
Thorslund, P. 1930. Über einige neue Trilobiten aus dem älteren Leptænakalk Dalekarliens. Bulletin of the Geological Institutions of the University of Uppsala 22, 299-303.
Eichwald, E. 1860. Lethaea Rossica ou Paléontologie de la Russie. Premier volume. Ancienne Période en deux sections. pp. XIX+1–1657. E. Schweizerbart. DOI:10.5962/bhl.title.52391