“Woah! It's like Spotify but for academic articles.”

Instant Access to Thousands of Journals for just $40/month

Get 2 Weeks Free

Homology and morphology of the neogastropod valve of Leiblein (Gastropoda: Caenogastropoda)

Homology and morphology of the neogastropod valve of Leiblein (Gastropoda: Caenogastropoda) The valve of Leiblein is a morphological synapomorphy defining Neogastropoda, but is also a significant adaptation in the evolution of carnivorous, predatory feeding and homologues have not been recognised amongst non-neogastropods to date. This study uses histology to examine the valve of Leiblein and associated oesophageal features of a buccinoidean ( Euplica scripta —Columbellidae) and two muricoideans ( Morula marginalba —Muricidae, and Columbarium pagodoides —Turbinellidae), and comparisons are made with the oesophagus of four non-neogastropods; the tonnoidean out-group Cabestana spengleri and three other littorinimorph caenogastropods. Several morphological details conflict with earlier descriptions of different neogastropod species, such as the presence of a diverticulum in the muricoidean valve and torsion in the buccinoidean valve. This supports recent findings that the valve of Leiblein is morphologically heterogeneous, but, unlike some other studies, does not dispute the homology of the valve in different neogastropod groups. Structure and histology support the homology of the valve of Leiblein in Muricoidea and Buccinoidea and its derivation from elements of the anterior oesophagus of higher littorinimorph caenogastropods (Tonnoidea). A thick, secretory, pseudostratified epithelium lining the ventral anterior oesophagus of C. spengleri is comparable with the tissue lining the glandular chamber of the valve of Leiblein. A modified theory regarding the evolutionary origin of the valve of Leiblein is proposed in which it is homologous to the anterior oesophagus of Tonnoidea. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Zoomorphology Springer Journals

Loading next page...
 
/lp/springer-journal/homology-and-morphology-of-the-neogastropod-valve-of-leiblein-NoIGwPJJ0F

You're reading a free preview. Subscribe to read the entire article.

And millions more from thousands of peer-reviewed journals, for just $40/month

Get 2 Weeks Free

To be the best researcher, you need access to the best research

  • With DeepDyve, you can stop worrying about how much articles cost, or if it's too much hassle to order — it's all at your fingertips. Your research is important and deserves the top content.
  • Read from thousands of the leading scholarly journals from Springer, Elsevier, Nature, IEEE, Wiley-Blackwell and more.
  • All the latest content is available, no embargo periods.

Stop missing out on the latest updates in your field

  • We’ll send you automatic email updates on the keywords and journals you tell us are most important to you.
  • There is a lot of content out there, so we help you sift through it and stay organized.