Cymospira decumbens

McIntosh, W.C. [M'Intosh]. (1885). Report on the Annelida Polychaeta collected by H.M.S. Challenger during the years 1873-1876. <em>Report on the Scientific Results of the Voyage of H.M.S. Challenger during the years 1873–76. Zoology.</em> 12 (part 34): i-xxxvi, 1-554, pl. 1-55, 1A-39A, & Annelida stations map.

Sowerby I, G. B. (1821-1834). <i>The genera of recent and fossil shells, for the use of students, in conchology and geology</i>. Published in 42 parts. Vol. 1, pls 1-126 [1821-1825]; vol. 2, pls 127-262 + text (unpaginated) [1825-1834]. London: G. B. Sowerby.