Cryptopora boettgeri

Bitner, M. A.; Logan, A. (2016). Recent Brachiopoda from the Mozambique-Madagascar area, western Indian Ocean. <em>Zoosystema.</em> 38(1): 5-41.

Cooper, G. A. (1973). Vema's Brachiopoda (recent). <em>Smithsonian Contributions to Paleobiology.</em> 17: 1-51, fig. 1-5, 9 pl.

Helmcke, J. G. (1940). Die Brachiopoden der deutschen Tiefsee-Expedition. <em>Wissenschaftliche Ergebnisse der deutschen Tiefsee-Expedition auf dem Dampfer “Valdivia” 1898–1899, vol. 24, no. 3. G. Fischer Verlag. 1932–1940. Jena. p. 215–316, 40 fig.</em>

Hiller, N. (1994). The environment, biogeography, and origin of the southern African recent brachiopod fauna. <em>Journal of Paleontology.</em> 68(4): 776-786.

Logan, A. (2007). Geographic distribution of extant articulated brachiopods. <em>In: Treatise on Invertebrate Paleontology, Part H, Brachiopoda (revised), vol.6, 3082–3115. Geological Society of America, Boulder, Colorado, and University of Kansas Press, Lawrence, Kansas.</em>