The attached was found by me in a bunch of dredged shells in Amuay, Paraguana
Peninsula, Venezuela last month.
I hope the size can be determined from my fingers. Thanks, Ron in Olympia.
Send thoughts and
Longhorn", phylum Bryozoa, genus Hippoporidra, species ??
For an interesting article go to one of the Jacksonville Shells Club's
Page at: http://www.jaxshells.org/jdawley.htm
That seems to be a sponge
(phylum Porifera), but i don´t know it...
Wiggers, from sunny Brazil
Those look like a species
of Hippoporidra, a bryozoan colony that builds its structure
on a small gastropod shell. The shell is often then inhabited by a
hermit crab...Tom E.
I agree with Tom. -A
congener has a somewhat different "shell" topology, and
is more familiar to Florida and other Gulf of Mexico offshore collectors.
The late June Dawley wrote a short paper on that species, the "Texas
Longhorn;" and its symbiont. The article is posted at: http://www.jaxshells.org/jdawley.htm
This was fairly common
in beach drift on Margarita Island during my Labor
Day w/e trip. Looks like Olivella minuta is a frequent foundation
Hey all;- I have seen
(collected) several Olive shells in South Carolina with just such
Bryozoan colonies attached. They can generally be removed in one piece.
I haven't found any of them inhabited by crabs. Perhaps it is because
the Olives are too heavy for their siize for the crab to move in comfortably.
I suppose the colonies would also grow on whelks---but I haven't noticed.
This is definitely a
hermitcrab-associate bryozoan. The same genus (and probably species)
occurs in NZ, and I have dredged them.
The colony starts on a shell inhabited by a crab, and overgrows the
aperture, producing a tube...Andrew G.