Gonium? glaucum Ehrenberg, 1838: 58, pl. III: fig. V (type locality: Wismar, Rostock District, Germany).
Merismopedia glauca (Ehrenberg) Kützing, 1845: 142.—Børgesen, 1936: 58.— S. Dixit, 1968: 11.— Islam, 1974b: 89.— Islam, 1976: 69, pl. 64: fig. 382; pl. 73: fig. 425.— N. Anand et al., 1986: 53, fig. 4.— G. Subramanian et al., 1989: 313, 315.— S. Silva, 1992a: 111, fig. 13.— S. Silva, 1992b: 102, fig. 6.— Thajuddin & G. Subramanian, 1992a: table III.
INDIAN OCEAN DISTRIBUTION: Bangladesh, India, Mozambique, Sri Lanka.
Note: Drouet & Daily (1956: 87), on the basis of the original description, assigned this species to Agmenellum quadruplicatum (Meneghini) Brébisson (1839: 35) (Trochiscia quadruplicata Meneghini, 1837: 334; type locality: Euganean thermal springs, near Padova, Italy). The latter species has not been reported from the Indian Ocean.