Cirsotrema

Shell thick, acuminate, chalk white, with a strong basal cord; well-developed, complicated axial and spiral sculpture, sometimes the axial elements meet producing small pits through which the underlying spiral sculpture can been seen; lacking pitted intritacalx; continuous, thickened peristome; umbilicus closed

Genotype:

Genotype, Scalaria varicosa Lamarck 1822, monotypic.

Literature cited:

Brown, L. & Neville, B.D. (2015). Catalog of the recent taxa of the families Epitoniidae and Nystiellidae (Mollusca: Gastropoda) with a bibliography of the descriptive and systematic literature. Zootaxa. 3907(1). pp: 001-188
Clench, W. J. [ed] (1959). The Genera AMAEA and EPITONIUM in the Western Atlantic. Jonsonia. 3(33-39). pp: 344
Cotton, B.C. & Godfrey, F.K. (1931). South Australian Shells Part II. The South Australian Naturalist. 13(1). pp: 5
DuShane, H. (1974). The Panamic-Galapagan Epitoniidae. The Veliger. 16 (Sup. 14). pp: 1-84
Kilburn, R.N (1985). The family Epitoniidae (Mollusca: Gastropoda) in southern Africa and Mozambique. Annals of the Natal Museum. 27(1). pp: 239-337
Kokshoorn, B., Gittenberger, J. & Gittenberger, A (2007). Epitoniid parasites (Gastropoda, Caenogastropoda, Epitoniidae) and their host sea anemones (Cnidaria,Actiniaria,Ceriantharia) in the Spermonde archipelago, Sulawesi, Indonesia. Basteria. 71(1-3). pp: 33-56
Nakayama, T. (2003). A Review of Northwest Pacific Epitoniids. Monographs of Marine Mollusca. 6. pp: 50