Seraphs andersoni ( Dickerson, 1917 )

Maxwell, Stephen J., Rymer, Tasmin L. & Congdon, Bradley C., 2021, Resolving phylogenetic and classical nomenclature: A revision of Seraphsidae Jung, 1974 (Gastropoda: Neostromboidae), Zootaxa 4990 (3), pp. 401-453 : 411

Seraphs andersoni ( Dickerson, 1917)

Figure 4A

1917 Terebellum andersoni Dickerson , p. 180, pl. 31, figs. 9a, b. Jung 1974, p. 29. Effinger 1938, p. 363. = Seraphs (Seraphs) andersoni Dickerson — Jung 1974, p. 29, pl. 9, figs. 5, 6. Effinger 1938, p. 380.

Terebellum fusiforme Lamarck —de Gregorio 1890, p. 116, pl. 10, figs. 9, 10.

Type material. Holotype — CAS 434 . The holotype measures 38 mm in length, with a width of 11 mm ( Jung 1974).

Typelocality. Cowlitz River , Vader, Lewis County, Washington [Rupelian] .

Diagnosis. The shell is moderately stout and convolute. The apex is pointed, and there is no evidence of sutures between the volutions. The whorls have protocyrt growth lines. The aperture has a thin labrum and a columella that is basally recurved.

Distribution. OLIGOCENE—Rupelian— USA, east bank of the Cowlitz River, near Vader, Lewis County, Washington ( Jung 1974); Santa Barbara County, California ( Effinger 1938); Griens Ranch Fauna of Western Wash- ington ( Effinger 1938).

Remarks. Seraphs andersoni is the only member of Seraphs from the north-west American Rupelian. The shape is distinctive in having a more acute apex than other Seraphs . There are two species that proceed S. andersoni from the Priabonian, S. kaindraperi new species from the Caribbean and S. belemnitus from Florida; both species have a much stouter spire and are less biconic, being more rectangular than S. andersoni . One species of Seraphs proceeds S. andersoni in the Americas, S. hernandoensis from the Chattian and Aquitanian of south-eastern United States; this differs from S. andersoni in having a much more elongated and narrow form.

Figures

FIGURE 4. Seraphs Montfort, 1810. A. Seraphs andersoni (Dickerson, 1917), holotype, CAS Department of Geology 434, length 38 mm (Jung 1974, pl. 9, fig. 5). B. Seraphs belemnitus (Palmer, 1953), PRI 29236, length 48.2 mm (Jung 1974, pl. 6, figs. 12–14). C. Seraphs caracassense (Leymerie, 1846), BMNH G50180, length 51.3mm (Jung 1974, pl. 4, figs. 10, 11). D. Seraphs chilophorus (Cossmann, 1889), MNHN A28779, Collection de Paleontologie, Paris, length 29 mm (Caze et al. 2010, figs. 15A, B, D). E. Seraphs hernandoensis (Mansfield, 1937), holotype, USNM 495948, length 31.4 mm (Jung 1974, pl. 9, figs. 7–9). F. Seraphs kaindraperi new sp., holotype, USNM 135098, length 50.6 mm (Jung 1974, pl. 5, figs. 3, 4). G. Seraphs leukoleptus Jung, 1974, neotype, MNHN A28781, Collection de Paleontologie, Paris, length 27.6 mm (Caze et al. 2010, figs. 11F, H, I). H. Seraphs mayeri Jung, 1974, holotype, NMB H16579, length 21.4 mm (Jung 1974, pl. 8, figs. 16–18).