original description
Ihering, H. von. (1876). Versuch eines natürlichen Systemes der Mollusken. <em>Jahrbucher d. Deutschen Malakozoologischen Gesellschaft.</em> 3: 97-148. [April]., available online at https://www.biodiversitylibrary.org/page/16296367
page(s): 137; note: original rank as Class of "Phylum Amphineura" (treated as separate from Mollusca) [details]
additional source
Salvini-Plawen, L. von. (2006). The Significance of the Placophora for Molluscan Phylogeny. <em>Venus (Journal of the Malacological Society of Japan).</em> 65 (1-2): 1-17., available online at https://www.jstage.jst.go.jp/article/venus/65/1-2/65_KJ00004408533/_pdf [details] Available for editors 
[request]
additional source
Runnegar B. & Pojeta, J. 1974 Molluscan phylogeny: the paleontological viewpoint. <i>Science</i> 186 (4161): pp.311-317 [details] Available for editors [request]
additional source
Stasek C., 1972. The molluscan framework. In: Florkin, M., Scheer, B.T. (Eds.), Chemical Zoology, vol. 7, pp. 1–44. [details]
From editor or global species database
Taxonomy This name has been in usage in the second half of the XXth century. Runnegar & Pojeta (1974) ranked it as Subphylum containing only the class Polyplacophora, along with Aculifera Hatscheck 1891 containing only the class Aplacophora, and with the subphylum Conchifera Gegenbaur 1878, containing the Monoplacophora and the other classes derived from it. Currently (as of 2020) the Polyplacophora are considered part of the Aculifera. [details]
