Fig. 1 in Phyletic evolution and iterative speciation in the persistent Pristiograptus dubius lineage

Fig. 1. Graptolite phylogenetic relationships between the iterative of Pristiograptus dubius group taxa species and subspecies from Poland and Lithuania and their stratigraphical ranges. For more data concerning iterative clades that branched off the stem lineage see Fig. 4. Generalized graptolites biozones (Koren' et al. 1996) correlated with biozones of Poland and Lithuania (Urbanek and Teller 1997; Radzevičius 2007). Abbreviations: B., Bohemograptus; Col., Colonograptus; Cucullo., Cucullograptus; Cyrto., Cyrtograptus; d., dubius; G., Gothograptus; I., Istrograptus; L., Lobograptus; M., Monograptus; Neocol., Neocolonograptus; Neocucul., Neocucullograptus; Neodiver., Neodiversograptus; Neolob., Neolobograptus; P., Pristiograptus; S., Saetograptus; Slov., Slovinograptus; t., transgrediens; U., Uncinatograptus.