Fig. 8. A–G in Variability of conch morphology in a cephalopod species from the Cambrian to Ordovician transition strata of Siberia ...

• Main Author: Dzik, Jerzy
• Format: Still Image
• Language: unknown
• Published: Zenodo 2020
• Subjects: Biodiversity; Taxonomy; lena river; Yakutia; Siberia
• Online Access: https://dx.doi.org/10.5281/zenodo.12195931; https://zenodo.org/doi/10.5281/zenodo.12195931

Fig. 8. A–G. Phosphatised siphuncle connecting rings of ellesmeroceratid nautiloids (interpreted below as Ruthenoceras elongatum Korde, 1949) from sample Ang-6, block No. 2, probably latest Furongian Ust-kut Formation found at Pashino on the Angara River, Siberia, Russia. ZPAL N. IV/152, 148, 147, 153, 151, 149, 150, respectively. Specimens in dorsal views, also details in higher magnification (B2 and B3; see also Dzik 2010: fig. 7f), except ventral (E1) and lateral (E2) views. ZPAL N. IV/148 and 150 (see also Dzik 2010: fig. 7b and c). H. For comparison the earliest Cambrian (Tommotian) " hyolith" Turcutheca crassaecochlia Syssoiev, 1962, ZPAL MoXX/7 from the Tommotian (Dokidocyathus lenaicus Zone) at Bydyangaia on the Lena River, central Yakutia of possible distant cephalopod affinity, probably mature specimen with displaced embryonic part preserved as a glauconitic internal mold, lateral (H1) and posterior ("ventral") (H2) views (see also Dzik 2010: fig. 7b and c). ... : Published as part of Dzik, Jerzy, 2020, Variability of conch morphology in a cephalopod species from the Cambrian to Ordovician transition strata of Siberia, pp. 149-165 in Acta Palaeontologica Polonica 65 (1) on page 158, DOI: 10.4202/app.00674.2019, http://zenodo.org/record/12195918 ...