Cyclostrema (Daronia) subexcavatumTryon, 1888, p. 99, pl. 33, figs. 17-18 [Basis of the current name] Type Locality: Challenger sta. 24, 18°38'30"N, 65°5'30"W, off Culebra Island, West Indies, 390 fathoms Range: 18.64°N ; 65.09°W Depth: 713 m Maximum Reported Size: 2.2 mm Distribution: Puerto Rico: Culebra Island Comments: New name for C. excavatum Watson non Carpenter.
Cyclostrema excavatumWatson, 1886, p. 121, pl. 8, figs. 10a-c [Objective synonym of valid name] Type Locality: Challenger sta. 24, 18°38'30"N, 65°5'30"W, off Culebra Island, West Indies, 390 fathoms Range: 18.64°N ; 65.09°W Depth: 713 m Maximum Reported Size: 2.2 mm Distribution: Puerto Rico: Culebra Island References: Watson (1886) DdNSEWM Comments: Non Carpenter, 1856.
Partial List of References
Tryon, G. W. 1888. Monographs of the families Neritidae, Neritopsidae, Adeorbidae, Cyclostrematidae, and Liotiidae Manual of Conchology (1)10 3-160, 291-311, pls. 1-36. [Stated date: -- --- 1888; true date: 16 Mar 1888.] Watson, R. B. 1886. Report on the Scaphopoda and Gasteropoda collected by H.M.S. Challenger during the years 1873-1876 Report on the Scientific Results of the Voyage of H.M.S. Challenger, Zoology 15(2) i-v, 1-680, 692-756, 50 pls. Her Majesty's Government: London. [Stated date: -- --- 1886; true date: post Aug 9.]
