The impossibility of inverted suture lines in ammonites
- 1 October 1978
- journal article
- research article
- Published by Scandinavian University Press / Universitetsforlaget AS in Lethaia
- Vol. 11 (4) , 307-313
- https://doi.org/10.1111/j.1502-3931.1978.tb01887.x
Abstract
The biological organization of ammonities does not permit a true inversion of suture lines to occur. However, the complex pattern of the ammonite phragmocone (nacreous septa, membrane coverings, siphuncle and soft body) does show weak points in growth regulation. This provides instabilities which lead to a pseudo-inversion caused by mechanical compression of the saddles.This publication has 9 references indexed in Scilit:
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- Model for origin, function and fabrication of fluted cephalopod septaPalZ, 1975
- Fabricational Noise in Adaptive MorphologySystematic Zoology, 1973
- The case of alleged inversion of septal sutures in ammonitesLethaia, 1972
- On the buoyancy of the pearly nautilusJournal of the Marine Biological Association of the United Kingdom, 1966
- Sutures and Septa in Jurassic Ammonite SystematicsGeological Magazine, 1957
- A case of inversion of suture lines in Hysteroceras varicosum (Sow.)American Journal of Science, 1941