Paraseraphs placitus Jung, 1974

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 : 429

Paraseraphs placitus Jung, 1974

Figure 7E

1974 Paraseraphs placitus Jung , p. 38, pl. 10, figs. 13–18, tf. 28. Caze et al. 2010, p. 456 , figs. 24G–M, 28.

Terebellum fusiforme Lamarck — Morris 1843, p. 163. Jung 1974, p. 38. = Terebellum fusiforme Sowerby — Morris 1843, p. 163. Jung 1974, p. 38. Caze et al. 2010, p. 456.

Type material. Holotype — NMB H14491. The type measures 22.7 mm in length and a width of 6.3 mm ( Jung 1974).

Type locality. Chaussy , Seine et Oise, France [Lutetian] .

Diagnosis. The shell is moderately slender, with a protoconch of 11 / 2 to 13 / 4 nearly planispiral glassy whorls. The teleoconch has 21 / 4 whorls, with a sculpture of faint axial striations and spiral striations on the upper whorls. The body whorl possesses a few spiral grooves basally adjoining the labium. The labrum is adapically thickened only, and continues parallel to the apex forming a posterior canal. The base of the labrum does not continue to the base of the columella. The columella is bent backward basally.

Distribution. EOCENE—Bartonian— France Baron, Oise ( Caze et al. 2010); Caumont, Seine-et-Marne ( Caze et al. 2010); Le Guépelle, Val-d’Oise ( Caze et al. 2010). Lutetian— France Chaussy, Val d’Oise ( Jung 1974; Caze et al. 2010); Fontenay-en-Vexin, Eure ( Caze et al. 2010); Vandancort, Oise ( Caze et al. 2010); Parnes, Oise ( Jung 1974; Caze et al. 2010); Fercourt, Oise ( Caze et al. 2010); Châteaurouge, Oise ( Caze et al. 2010); Ponchon, Oise ( Caze et al. 2010); Grignon, Yvelines ( Jung 1974; Caze et al. 2010). Ypresian— France Mouchy, Paris Basin ( Jung 1974). Belgium Sables de Wemmel ( Jung 1974). The United Kingdom Barton ( Morris 1843); Bracklesham ( Morris 1843).

Remarks. This species is often confused with P. tetanus but differs from that species in being less elongate than P. tetanus ; it also has spiral striations that are lacking in that species.

Figures

FIGURE 7. Paraseraphs Jung, 1974. A. Paraseraphs ameri (Abbass, 1967), Holotype, EMC, Gastropod Section, G363, incomplete (Abbass 1967, p. 61, pl. VIII, fig. 6). B. Paraseraphs armoricensis (Cossmann, 1897), Dumas Collection, length 22.7 mm (Jung 1974, pl. 10, figs. 16–18). C. Paraseraphs cantamessae Maxwell et al., 2018a, holotype, USNM 135097A, length 56.9 mm (Maxwell et al. 2018a, fig. 1). D. Paraseraphs erraticus (Cooper, 1894)), UCMP 15820, length 26.8 mm (Jung 1974, pl. 12, figs. 8–10). E. Paraseraphs placitus Jung, 1974, holotype, NMB H14491, length 22.7 mm (Jung 1974, pl. 10, figs. 16–18). F. Paraseraphs praecedens Caze et al., 2010, holotype, MNHN A05707, Collection de Paleontologie, Paris, length 19 mm (Caze et al. 2010, figs. 29E, F). G. Paraseraphs procerus (Merian, 1844), holotype, NMB H14374, length 71.8 mm (Jung 1974, pl. 12, figs. 1, 2). H. Paraseraphs propedistortus (de Gregorio, 1880), NMB H14509, length 53.2 mm (Jung 1974, pl. 11, figs. 12–13). I. Paraseraphs tetanus Jung, 1974, holotype, NMB H15409, length 28.7 mm (Jung 1974, pl. 10, figs. 5–7). J) Paraseraphs texanopsis Garvie, 2013, Texas Natural Science Centre, UT(Austin), NPL46617, length 53.3 mm (Garvie 2013, pl. 1, figs. 10, 11).