Key: Family Petricolidae
Phylum Mollusca
Class
Bivalvia
Subclass Heterodonta
Order Veneroida
Taken primarily from Kozloff,
1987, 1996 p. 282 (Copyright
1987, 1996, University of
Washington Press. Used in this web page by permission of University
of Washington Press)
| 1a |
Valves with prominent radial ribs, especially
in the anterior
one-third; length about 2.5 times the height, burrowing in clay and
firm
mud (introduced from the Atlantic) |
Petricola (Petricola) pholadiformis |
| 1b |
Radial sculpture barely apparent, consisting of closely
spaced fine
lines (these may be completely worn away); length less than twice the
height;
nestling in crevices and in burrows originally made by rock-boring
bivalves
(the shell is generally misshapen, conforming to the limited space in
which
the animal is living) |
Petricola
(Rupellaria) carditoides |
Taxonomic
Levels Represented
in This Key:
Petricola
(Rupellaria)
carditoides
Page created by Dave Cowles, 2006
Edited by:
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