Cells are usually solitary and found attached to sand grains on sandy beaches. This particular cell probably has just divided, which would account for the extra horns in the center. Can also be found in surf diatom community. Never very abundant. (Horner)
This came from a South River sample collected by Taki Nakamura. He is participating in SERC's STAR (Student Training in Aquatic Research) program. He is a senior at Thomas Jefferson High School for Science and Technology, Fairfax, VA.