Conus gradatus thaanumi Schwengel, 1955 - Citation: CONUS BIODIVERSITY WEBSITE CATALOGUE

Schwengel, J. S., 1955. New Conus from Costa Rica. The Nautilus: A Quarterly Devoted to Malacology, 69 (1 ): 13 -15 .

New Species-Group Names:

andrangae Schwengel, 1955. p. 14. pl. 2. f. 8-11.
drangai Schwengel, 1955. p. 13. pl. 2. f. 1-7.
helenae Schwengel, 1955. p. 15. pl. 2. f. 14. 15.
thaanumi Schwengel, 1955. p. 15. pl. 2. f. 12. 13.