+ Main Category
Biology: 18066
Agriculture: 7684
Horticulture: 3982
Forestry: 843
Geography: 5126
Environment: 5562
Research: 2212
Society: 445
+ Tell a Friend
Fill out the information below to email a friend a brief note about 'TropHort: Biology, Agriculture and Geography'
+ Top 10
+ Directory Statistics
Links: 41700
Categories: 7193
Registered Users: 590
Mailing List Subscribers: 111
+ Pagerank Statistics
+ Join Mailing List
Joining mailing list will entitle you
to receive occasional emails informing you of news and
updates to the site and any special offers that may be
of interest to you.
Hemichordata
Top > Biology > Biota > Fauna > Hemichordata
Hemichordata is a phylum of worm-shaped marine deuterostome animals, generally considered the sister group of the echinoderms. They date back to the Lower or Middle Cambrian and include an important class of fossils called graptolites, most of which became extinct in the Carboniferous.
|
Subscribe to this category
|
Categories
Enteropneusta
(1)
Planctosphaeroidea
(0)
|
Pterobranchia
(15)
|
Popular Tags
Web Links
A brief introduction to the hemichordates from the Biological Sciences at the University of Paisley.
Details Hits: 1 Votes: 0 Ratings: 
Reviews: 
Google PR: UCMP Berkeley's introduction to the acorn worms. The site includes information on graptolites.
Details Hits: 1 Votes: 0 Ratings: Reviews: Google PR: Photograph of an acorn worm (Saccoglossus kowalevskii).
Details Hits: 1 Votes: 0 Ratings: Reviews: Google PR:
|
Subscribe to this category
|
