Traits taxon details
original description
(of Bulla hornii Gabb, 1864 †) Gabb, W. M. (1864). Description of the Cretaceous fossils. <em>In: Meek, F. B. and Gabb, W. M. Geological Survey of California, Palaeontology of California.</em> 1: 55-243, pls. 9-32., available online at https://biodiversitylibrary.org/page/2062749 page(s): 143, pl. 29, fig. 235 [details] 
new combination reference
Cunha, C. M. & Salvador, R. B. (2018). Type specimens of fossil “Architectibranchia” and Cephalaspidea (Mollusca, Heterobranchia) in the Academy of Natural Sciences of Philadelphia. <em>Zoosystematics and Evolution.</em> 94(2): 505-527., available online at https://doi.org/10.3897/zse.94.27401 [details]
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