|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Bivalvia - Protobranchia
It was reranked as the subclass Protobranchia by Purchon (1987), Salvini-Plawen and Steiner (1996), Reid (1998), Bieler and Mikkelsen (2006) and Carter et al. (2011); it was considered an invalid subgroup of Bivalvia by Giribet and Wheeler (2002); it was reranked as the unranked clade Protobranchia by Mikkelsen and Bieler (2008); it was reranked as the superorder Protobranchia by Nevesskaja (2009).
It was assigned to Eubivalvia by Carter et al. (2011); and to Bivalvia by Ridewood (1903), Pelseneer (1906), Pelseneer (1911), Purchon (1987), Salvini-Plawen and Steiner (1996), Reid (1998), Bieler and Mikkelsen (2006), Mikkelsen and Bieler (2008), Nevesskaja (2009) and Coan and Valentich-Scott (2012).
|Year||Name and author|
|1996||Protobranchia Salvini-Plawen and Steiner|
|2006||Protobranchia Bieler and Mikkelsen p. 228|
|2008||Protobranchia Mikkelsen and Bieler p. 19|
|2011||Protobranchia Carter et al. p. 5|
|2012||Protobranchia Coan and Valentich-Scott p. 32|
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