Type specimens of fossil " Architectibranchia " and Cephalaspidea (Mollusca, Heterobranchia) in the Academy of Natural Sciences of Philadelphia Author Cunha, Carlo M. Author Salvador, Rodrigo B. text Zoosystematics and Evolution 2018 94 2 505 527 http://dx.doi.org/10.3897/zse.94.27401 journal article http://dx.doi.org/10.3897/zse.94.27401 1860-0743-2-505 09EC3F78C68C4F9CA76D008DDAE13B3E Acteon biplicatus (Gabb, 1860) Figure 1 O-P Acteonina biplicata Gabb, 1860a: 93, pl. 2, fig. 13 [non d'Orbigny ]. Type locality. -New Jersey, USA; stratum: "Lower Green Marls" (Navesink Formation); age: Cretaceous. Type material. Syntypes, ANSP IP19466 (as "type" in Richards 1968 : 107), 1 shell, ANSP 19467, 1 shell. Current taxonomic status. Acteon gabbana Whitfield, 1892 ( Whitfield 1892 , Richards and Ramsdell 1962 ).