Skip to main content

Free Content Ecological Observations on the Recent Articulate Brachiopod Argyrotheca bermudana Dall from the Bermuda Platform

Download Article:
(PDF 4,393.9 kb)


The occurrence and life habits of the diminutive articulate brachiopod Argyrotheca bermudana have been investigated along a general NW-SE traverse across the Bermuda Platform, incorporating all seven biotopes recognized by Upchurch (1970). Sediment samples indicate that brachiopod tests comprise a consistent though minor (<1%) fraction in reefal shoal sediments, but are totally absent from lagoonal sediments.

Preliminary transects reveal that in the reef-front terrace, north reef and central and south reef biotopes, A. bermudana is cryptic in habit, occurring on the undersides of the foliaceous hermatypic corals Montastrea cavernosa (L.), M. annularis (Ellis and Solander), and Agaricia fragilis Dana. The main host coral for brachiopods on the south shore reefs and associated reef-front terrace is M. cavernosa, on the north reef-front terrace, north and central reefs it is M. annularis, while A. fragilis is more important on the lagoonal and near-shore reefs.

Brachiopod densities generally decrease shorewards from the edge of the Platform. The distribution and density of brachiopods appears to be controlled primarily by the relative abundance of the host corals and their growth form, although other limiting factors may be at work. Clumped distributions are common, probably the result of brooded larvae and intense competition for living space. Inter-island areas such as Castle Harbor and Harrington Sound are virtually devoid of brachiopods, although a relict population exists marginally in an unusual sub-boulder habitat in land-locked Walsingham Pond.

Document Type: Research Article

Publication date: April 1, 1975

More about this publication?
  • The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
  • Editorial Board
  • Information for Authors
  • Subscribe to this Title
  • Terms & Conditions
  • Ingenta Connect is not responsible for the content or availability of external websites

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Partial Open Access Content
Partial Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more