Work found, with species-group names introduced therein:
Gracia, A. and F. Boyer. 2004. Distribution of Volvarina hennequini Boyer, 2001 in the Western Caribbean Sea and description of a new bathyal Volvarina from northern Colombia. Novapex 5 79-84. [Stated date: 10 Jul 2004; true date: pre 21 July.] Volvarina bayeri