Gigantidas Cosel & Marshall, 2003

Saether, Kristian P., Jingeng, Sha, Little, Crispin T. S. & Campbell, Kathleen A., 2016, New records and a new species of bivalve (Mollusca: Bivalvia) from Miocene hydrocarbon seep deposits, North Island, New Zealand, Zootaxa 4154 (1), pp. 1-26 : 7

Genus Gigantidas Cosel & Marshall, 2003

Type species. Gigantidas gladius Cosel & Marshall, 2003 .

Remarks. This genus was erected by Cosel & Marshall (2003) to include only the type species, with a second species, G. horikoshii Hashimoto & Yamane, 2005 , added shortly afterwards from vent sites off Japan . A molecular analysis of bathymodioline mussels by Thubaut et al. (2013) moved the “ Bathymodiolus ” childressi clade into Gigantidas Cosel & Marshall, 2003 , substantially increasing the number of extant species ascribed to this genus. Gigantidas coseli Saether, Little, Campbell, Marshall, Collins & Alfaro, 2010 , from the Miocene of New Zealand, remains its only fossil species.