original description(ofBela pygmaea A. E. Verrill, 1882)Verrill, A. E. (1882). Catalogue of marine Mollusca added to the fauna of the New England region, during the past ten years. Transactions of the Connecticut Academy of Arts and Sciences. 5(2): 447-587, pls 42-44, 57-58 [May-July]., available online athttp://biodiversitylibrary.org/page/35718507[details]
original description(ofPleurotoma exigua Jeffreys, 1883)Jeffreys, J. G. (1883). On the Mollusca procured during the cruise of H. M. S. Triton, between the Hebrides and Faeroes in 1882. Proceedings of the Zoological Society of London. (1883): 389-399, pl. 44., available online athttp://biodiversitylibrary.org/page/30828055 page(s): 398; pl. 44 fig. 10 [details]
context source (Deepsea)Intergovernmental Oceanographic Commission (IOC) of UNESCO. The Ocean Biogeographic Information System (OBIS), available online athttp://www.iobis.org/[details]
basis of recordRosenberg, G. 2004. Malacolog Version 3.3.2: Western Atlantic gastropod database. The Academy of Natural Sciences, Philadelphia, PA., available online athttp://www.malacolog.org[details]