Cryptic bivalves with descriptions of new species from the Rodrigues lagoon Author Oliver, P. Graham Author Holmes, Anna text Journal of Natural History 2004 2004-12-01 38 23 3175 3227 http://dx.doi.org/10.1080/00222930410001695123 journal article 10.1080/00222930410001695123 1464-5262 10097787 Coralliophaga coralliophaga (Gmelin, 1791) ( figures 145–147 ) Material examined. Five valves from Grand Pate´ , off Port Mathurin , shell gravel, 18 mz, 19 ‡ 39.307 ’ S, 63 ‡ 24.950 ’ E, 29 September 2001 , sand in surge channel, 17 m , scuba, coll. N. L. Bruce and J. Smith , NMW .Z.2001.061.00042. Remarks. Coralliophaga coralliophaga has rarely been found on Rodrigues probably due to its inaccessible habitat (coral crevices) rather than any true rarity. Juvenile shells ( figure 145 ) lack the radial and lamellose sculpture that develops in the adult ( figure 146 ). Similar juvenile shells, from marine caves, were described by Hayami and Kase (1993) as a new species, Coralliophaga hyalina . We could not attribute any of the Rodrigues material to species other than C. coralliophaga . Genus Glossocardia Stoliczka, 1870 Type species: Cypricardia obesa Reeve, 1843 .