Bryozoans of Class
Gymnolaemata have zooids
which are polymorphic and usually not cylindrical, with a circular lophophore.
Order Cheilostomata has box-shaped zooids
with calcareous walls, the openings of which usually have opercula.
Embryos are usually brooded in ovicells.
Hippodiplosia insculpta has an erect (not simply
colony. Most of the frontal
region of the zooecia
is calcified and covered with large pores which are not arranged in
rough. No avicularia
present (but Carlton says the suboral depression mentioned below may
a tiny avicularium
in Hippoporina insculpta). Ovicells
are large and globular, without pores but with radiating
rim of the aperture of the zooecia
is raised into a peaked mound (umbo) which is separated from the
by a deep depression (but it has no pointed proximal tooth nor a
sinus). Young colonies may be flat but quickly extend into
projections, especially when growing under rocks. Color
yellow-brown, often growing in double sheets. May have orange
especially when ova
are present. Individual zooecia
are about 0.3 to 0.4 by 0.5 to 0.7 mm and rectangular to
The largest individuals are found at colder latitudes.
to 15 cm diameter.
Common name(s): Fluted bryozoan, fluted coral bryozoan, sculptured
|Hippodiplosia insculpta, found under
|(Photo by: Dave Cowles,
July 2009 )
Note: Part of this species has now been split off as
How to Distinguish from
The color and growth form of this colony with the large, striated ovicells
without pores and no avicularia
Range: Alaska to Gulf of
California and Costa Rica
Lower intertidal to
over 234 m
Rocks, shells, hydroids,
algae, and other bryozoans, on some polychaete worm tubes, pilings;
in areas with substantial water movement.
This species may sometimes host the entoproct Loxosomella
Predators include the topsnail Calliostoma canaliculatum.
2007 (on Hippoporina insculpta)
and Fairbanks, 1966
and Hanby, 2005
et al., 1980
et al., 1985
Wollacott, Robet M. and
Wheeler J. North, 1971. Bryozoans of California and northern
Mexico kelp beds. pp. 455-479 in North, Wheeler J. (ed.), The
Biology of Giant Kelp Beds (Macrocystis)
Beihefts zur Nova Hedwigia Heft 32. Publisher: J.
Cramer, Lehre, Germany.
General Notes and
abundances, unusual behaviors:
Authors and Editors of Page:
Dave Cowles (2009): Created original page
CSS coding for page developed by Jonathan Cowles (2007)