1 / 3

The planula hypothesis

The planula hypothesis. Cnidaria. Hydrozoa Scyphozoa Anthozoa Cubozoa. Characteristics. Double-layer body wall Both layers have muscular bases Use gastrovascular cavity as skeleton--hydrostatic skeleton Cnematocysts--cnematoblast--stinging cells Mesoglea--non-cellular layer

fancy
Download Presentation

The planula hypothesis

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The planula hypothesis

  2. Cnidaria • Hydrozoa • Scyphozoa • Anthozoa • Cubozoa

  3. Characteristics • Double-layer body wall • Both layers have muscular bases • Use gastrovascular cavity as skeleton--hydrostatic skeleton • Cnematocysts--cnematoblast--stinging cells • Mesoglea--non-cellular layer • Either polyp or medusae shaped • Alternation of generations--hydroid to a medusoid to a hydroid individual. Exception is the anthozoa • Planula larvae

More Related