By Neil H. Landman, Richard Arnold Davis, Royal H. Mapes
This booklet brings jointly overseas scientists who specialise in present-day and fossil cephalopods, ranging greatly from Paleozoic ammonoids to trendy octopods. It covers systematics and evolution; not easy- and smooth half morphology; and ecology, biogeography, and taphonomy. The ebook additionally contains new proof for the lifestyles of an ink sac in fossil ammonoids and lines the 1st list of an in-depth learn of octopus ecology in Alaska.
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Extra resources for Cephalopods Present and Past: New Insights and Fresh Perspectives
Scale bar = 200 mm. (D) Agoniatites vanuxemi (NYSM 3545, Devonian, New York State). Lateral view of ammonitella. Scale bar = 200 mm. (E, F) Fidelites fidelis (AMNH 50417, Devonian, Morocco). (E) Lateral view of ammonitella showing the flattening on the ventral side of the ammonitella. 00 mm. (F) Close-up of transverse lirae showing faint, perpendicular “wrinkle-like” creases (arrows) between them. Area of close-up is indicated by a box on 1E. Scale bar = 300 mm. 2 Patterns of Embryonic Development 17 Fig.
2 Appendix 8 Lirae spacing (in microns) on the embryonic shell of Latanarcestes sp. (AMNH 50416). 3 (continued) 48 Klofak et al. 8 50 Klofak et al. Appendix 9 Lirae spacing (in microns) on the postembryonic shell of Latanarcestes sp. (AMNH 50416). 4 Appendix 10 Lirae spacing (in microns) on the embryonic shell of Agoniatites vanuxemi (NYSM 3545).
36 Klofak et al. Other differences between these families can be seen in the pattern of the distances between the lirae on the ammonitella, especially on the initial chamber. In the Mimagoniatitidae, the changes in the spacing of the lirae follow the same pattern on both the ventral and dorsal sides of the shell. In the Anarcestidae and the Agoniatitidae, the pattern of change is different for the ventral and dorsal sides of the shell. In the Anarcestidae, where the ventral part of the shell shows an increase in the distance between lirae, the dorsal part of the shell shows no change or a slight decrease.
Cephalopods Present and Past: New Insights and Fresh Perspectives by Neil H. Landman, Richard Arnold Davis, Royal H. Mapes