Scaphander costatus (Gabb, 1864)

Cunha, Carlo M. & Salvador, Rodrigo B., 2018, Type specimens of fossil " Architectibranchia " and Cephalaspidea (Mollusca, Heterobranchia) in the Academy of Natural Sciences of Philadelphia, Zoosystematics and Evolution 94 (2), pp. 505-527 : 505

Scaphander costatus (Gabb, 1864) Figure 6 O–P

Cylichna costata Gabb, 1864: 143, pl. 2, fig. 107.

Type locality.

Martinez, Contra Costa County, California, USA; stratum: Tejon Formation s. l.; age: Eocene.

Type material.

Lectotype, ANSP IP4338 (designation by Stewart 1926: 437, pl. 27, fig. 3; see also Richards 1968: 118); paralectotypes, ANSP IP79477, 8 shells.

Remarks.

Type species of subgenus Mirascapha Stewart, 1927.

Current taxonomic status.

Scaphander (Mirascapha) costatus (Gabb, 1864) ( Squires 1984).

Species transferred to other gastropod groups

Here are listed the species (with type material in the ANSP collection) that were originally classified in “Architectibranchia” and Cephalaspidea , but that actually do not belong to them. Some of them have already undergone taxonomical revision and are listed concisely in Table 1, while others are reclassified below.