Modiolus americanus (American horse mussel) (San Salvador Island, Bahamas) 1 (15568036864)

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Description: Modiolus americanus (Leach, 1815) - exterior of a right valve of the American horse mussel, 3.15 cm across at its widest. Family Mytilidae (Devonian to Holocene) - the mussels are filter-feeding, epifaunal, byssal thread attachers that principally occupy shallow to deep marine and estuarine environments. Date: 6 March 2011, 18:40. Source: Modiolus americanus (American horse mussel) (San Salvador Island, Bahamas) 1. Author: James St. John.