Traits taxon details
original description
(of Purpuroidea dubia Gabb, 1860 †) Gabb, W. M. (1860). Descriptions of new species of Cretaceous fossils from New Jersey. <em>Proceedings of the Academy of Natural Sciences of Philadelphia.</em> 12: 93-95, pl. 2., available online at https://www.biodiversitylibrary.org/page/1801109 page(s): 94, pl. 2, fig. 11 [details]
additional source
Groves, L. T.; Squires, R. L. (2018). Annotated Catalog of the Fossil Invertebrates Described by, and Named for, William More Gabb (1839–1878). <em>Zootaxa.</em> 4534(1): 1-150., available online at https://doi.org/10.11646/zootaxa.4534.1.1 page(s): 77 [details] Available for editors 
new combination reference
Weller, Stuart. (1907). A report on the Cretaceous paleontology of New Jersey. Based upon the stratigraphic studies of George N. Knapp. <em>Geological Survey of New Jersey, Paleontology Series.</em> 4: i-ix, 1-872 [TEXT] + 873-1108 [PLATES; 111 pls.]., available online at https://www.biodiversitylibrary.org/page/19933289 page(s): 730 [details] 
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