Robert Jan "Roy" van de Hoek, President
Ballona Institute
Los Angeles, California
roy@naturespeace.org
June 17, 2014
Aspects of the Biology of Donax gouldi
And a Note on Evolution in Tellinaceae (Bivalvia)
By
Ross H. Pohlo
Department of Biology,
San Fernando Valley State College
Northridge, California 91324

(5 Text figures)

INTRODUCTION
          Donax gouldi DALL, 1921, is a small bivalve that lives in the surf zone of sandy marine beaches and ranges from Santa Barbara, California, Acapulco, Mexico.
MORI (1938, 1950), HEDGPETH (1953)....

MORPHOLOGY
Shell: As shown in Figure 1
          Animals opened in the field had very little sand in the mantle cavity.

MOVEMENT AND MAINTENANCE OF POSITION IN THE SURF ZONE
MORI (1938, 1950), HEDGPETH (1953)...
          Donax gouldi does not migrate with the rise and fall of the tide but stays in one position on the beach.

DISCUSSION and CONCLUSIONS
          An examination of the anatomy

It is possible that Donax may possess certain neotenous characteristics as well as some primitive ones. A feature that could equated with a primitive or neotenous condition is the stomach...........

ACKNOWLEDGMENT
          I wish to thank Charles R. Stasek for critically reading the manuscript and Mrs. Peter Lara, Hans Kraepelien, and Philip Bashook for their assistance in the field.

LITERATURE CITED
COE, WESLEY R.
1953. Resurgent populations of littoral marine invertebrates and their dependence on ocean currents and tidal currents. Ecology 34: 225 - 229.

HEDGPETH, JOEL W.
1953. An introduction to the zoogeography of the northwestern Gulf of Mexico with reference to the invertebrate fauna Inst. Mar. Sci. 3: 110 - 224.

1967. Veliger 9 (3): 330-337. Ross studied Donax gouldi Dall, 1921 at San Diego, LA, and Estero Beach.