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Swiss Journal of Palaeontology
Fig. 8 | Swiss Journal of Palaeontology

Fig. 8

From: Siphonal tube structure of the Late Devonian orthocerid Dolorthoceras from the Polar Urals (NW Russia) preserving nacre and organic fibres as well as its persistence in cephalopod evolution

Fig. 8

Dolorthoceras sp. (PIN-1894/100); River Malaya Usa, Polar Urals, NW Russia; Frasnian, Late Devonian. Median conch section. The bipartite lens-shaped structure (sectioned clutch) around the posterior part of the septal neck. Scale bar is 50 µm. ch chamber, cr connecting ring, ils inner part of lens-shaped structure, s septum, siph siphuncle, sn septal neck, ols outer part of lens shaped structure

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