Genus – Elphidiella
Genus Elphidiella Cushman, 1936
Elphidiella (Cushman), 1936, p. 89, pl. 4.
Description: Test differing from Elphidium in having two rows of openings at the sutures, and with a thickened are between the rows, without definite retral processes. Type species Elphidiella arctica (Parker and Jones, 1864)
Elphidiella hannai (Cushman and Grant, 1927)
Elphidiella nitida Cushman, 1941
Elphidiella hannai (Cushman and Grant, 1927), p. 77. pl. 8, figs, 1, 2; Cushman and McCulloch, 1939, p. 177, pl. 20, fig. 11; Cushman and Todd, 1947, p. 15, pl. 2, fig. 22; Bandy, 1953, pl. 22, figs. 4a,b; Lankford and Phleger, 1973, p. 119, pl. 3, figs. 26a, b; Patterson, Burbidge and Luternauer, 1998, p. 22, pl. 26, fig. 3; McGann, 2007, p. 66, pl. 10, figs. CC1, CC2; ázquez Riveiros and Patterson, 2008, figs 15.1-15-5.
Description: Test of medium size, the diameter about twice the thickness, periphery rounded but not broad, umbilical region flattened or very slightly concave, rarely slightly convex; chambers distinct, about 15 in last-formed coil, not inflated; sutures very distinct, limbate, flush with the surface, with a line of very fine pores, sometimes irregularly doubled, continued to the center of the umbilical region, the sutures appearing as curved lines on the lighter mass of the thick but finely perforate wall; aperture consisting of a series of very fine pores along the base of the apertural face and occasionally others scattered irregularly over the apertural face.
Remarks: Lankford and Phleger (1973) synonymized E. nitida with E. hannai because of the variation in expression of spinocity of the apertural face. These authors attribute this to the degree of weathering of the shell.
Distribution: The type specimens were collected of the Farallon Islands, central California, and they are widely distributed in shallow water long the north eastern Pacific margin (Cushman and McCulloch, 1939). E. hannai is one of the most common species found in Puget Sound.
