Larval Development and Metamorphosis in Sipuncula (original) (raw)

Journal Article

Department of Invertebrate Zoology, National Museum of Natural History, Smithsonian Institution

Washington, D.C. 20560

Search for other works by this author on:

Published:

01 August 2015

• PDF
• Split View
• • Article contents
  • Figures & tables
  • Video
  • Audio
  • Supplementary Data

Navbar Search Filter Mobile Enter search term Search

Abstract

In a brief review of development of the phylum Sipuncula, four patterns of development are recognized: (1) direct with no pelagic stage; (2) one larval stage, a lecithotrophic trochophore; (3) two larval stages, a lecithotrophic trochophore and a lecithotrophic pelagosphera; (4) two larval stages, a lecithotrophic trochophore and a planktotrophic pelagosphera. Larval types and their metamorphoses are described, with special attention to the development and morphology of the larval cuticle. In the majority of species studied, the egg envelope is transformed into the larval cuticle at metamorphosis of the trochophore. The cuticle of many planktotrophic pelagosphera larvae is characterized by surface papillae of diverse form and pattern. The underlying cuticle in some species is composed of layers of fibers at right angles to one another.

This content is only available as a PDF.

© 1976 by the American Society of Zoologists

Citations

Views

Altmetric

Metrics

Total Views 868

53 Pageviews

815 PDF Downloads

Since 12/1/2016

×

Email alerts

Citing articles via

• Latest

• Most Read

• Most Cited

More from Oxford Academic