Biology:Parietal callus

From HandWiki
Short description: Shell anatomy of some groups of snails
The shell of Semicassis pyrum has a large parietal callus, at the top in this image
The shell of Cymatium pileare has a narrow parietal callus around the surface of the aperture nearest the columella, on the left of the shell opening as it is shown here


The callus is often "glazed", to help the animal slide in and out of the shell more easily.[1]

When the callus covers of 50% of the surface area of the ventral part of the shell, it is called an "extreme parietal callus".[2]

See also

References

  1. ↑ Leal, José H. (2024-03-01). "The Fossil Conch and its Barnacles" (in en). https://www.shellmuseum.org/post/the-fossil-conch-and-its-barnacles. 
  2. ↑ San Jose State University; Pietsch, Carlie; Anderson, Brendan M.; Maistros, Lauren M.; Agelvis, Mariana; Allmon, Warren D. (2017). "Evaluating Ecological Function and Convergent Evolution of Extreme Parietal Callus in Marine Gastropods". Conference: Geological Society of America Annual Meeting. Geological Society of America Abstracts with Programs 49. doi:10.1130/abs/2017AM-307057. Bibcode: 2017GSAA...4907057P. https://gsa.confex.com/gsa/2017AM/webprogram/Paper307057.html. 



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