Tan S.K., Tan S.H. & Low M.E.Y. (2011) A reassessment of Verpa penis (Linnaeus, 1758) (Mollusca: Bivalvia: Clavagelloidea), a species presumed nationally extinct. Nature in Singapore 4: 5-8.
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Tan, S. K.; Tan, S. H.; Low, M. E. Y.
2011
A reassessment of Verpa penis (Linnaeus, 1758) (Mollusca: Bivalvia: Clavagelloidea), a species presumed nationally extinct