Fig. 2 in Minute Silurian oncocerid nautiloids with unusual colour patterns

Fig. 2. Shell size of nautiloids: shell height (axis x), length of body chamber (axis x), and shell length (diameter of circle), Butovice Na břekvici Section, Ludlow, Gorstian, Colonograptus colonus Zone (A) and Lochkov Nad ubikacemi Section, Ludlow, Ludfordian, Monograptus latilobus Zone (B). Data from Barrande (1865–1877) and author's collection. Note that Pomerantsoceras in both assemblages is the smallest nautiloid. The largest present nautiloids, tarpyhcerids Uranoceras and Boionautilus are all closely related taxa, as suggested by Turek (2008).