Cylichnella bidentata (d’Orbigny, 1841) Two-tooth Barrel-bubble

Acteocina bidentata (d’Orbigny, 1841) Two-tooth Barrel-bubble

Cylichnella bidentata (d’Orbigny, 1841) Two-tooth Barrel-bubble Cylichnella bidentata (d’Orbigny, 1841) Two-tooth Barrel-bubble

Big Talbot Island, Duval Co., Florida (about 2 mm.)

Scanning electron micrographs (SEM) of fossil specimens

Cylichnella bidentata (d’Orbigny, 1841) Two-tooth Barrel-bubbleCylichnella bidentata (d’Orbigny, 1841) Two-tooth Barrel-bubble

   Lower Pinecrest beds, Upper Tamiami Formation, Sarasota County, Florida (left specimen 1.74 mm. and right specimen 1.95 mm. ). SEMs produced in collaboration with Dr. Ann Heatherington, Dept. of Geology, University of Florida, Gainesville, FL.