Type locality: U.S. Coast Guard Station (26°4’N 97°1’W), South Padre Island, Texas, U.S.A. Holotype: June, 1975; on submerged stones. NSW 738978. Type culture: UTEX LB 2545. UTEX Culture Collection of Algae, 1 University Station A6700, University of Texas, Austin, TX 78712-0183, U.S.A. CCMP 1944, Bigelow Laboratory for Ocean Sciences, P.O. Box 475, 180 McKown Point Road, West Boothbay Harbor, ME 04575 USA.