Synthecium symmetricum Fraser, 1938a

Distribution in South America: polyp—Pacific Ocean, Colombia, at 6.78°N 77.60°W in Octavia Bay, at 5.99°N 77.36°W in Port Utria, Ecuador, at 0.56°N 80.01°W in San Francisco Bay, at 2.19°S 80.90°W in Santa Elena Bay (Fraser 1938a, 1938b, 1948).

Habitat: polyp—from 4 to 73m depth (Fraser 1938a, 1938b).