Seraphs leukoleptus 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 : 413-414

Seraphs leukoleptus Jung, 1974

Figure 4G

1880 Terebellum (Seraphs) fusiformopse de Gregorio , p. 22, pl. 1, fig. 17. Cossmann 1889, p. 93, pl. 3, figs. 3, 4. Caze et al. 2010, p. 438.

1974 Seraphs (Seraphs) leukoleptus Jung , p. 23, pl. 6, figs. 1–3, tf. 17. = Seraphs leukoleptus Jung — Pacaud 2008, p. 727. Caze et al. 2010, p. 438, figs. 11F, H, I, and 13A–H.

Type material. Neotype — MNHN no. A28781 was selected by Caze et al. (2010) to bring taxonomic clarity, given the Jung (1974) type could not be found. The latter specimen, according to Jung, measures 27.6 mm in length, with a width of 6.2 mm.

Type locality. Chaussy , France [Lutetian] .

Diagnosis. The shell is convolute, slender, becoming broader towards the base with the widest part just above the base. The surface of the shell is smooth with a few faint basal spiral sulci. The columella is slightly bent backward near the base. The labial callus is conspicuous, reaching the apex, and is separated from the surface of the shell. The labrum is straight in profile and slightly opisthocline. The base of the labrum is only slightly above the base of the columella.

Distribution. EOCENE—Lutetian— France Chaussy ( Jung 1974; Caze et al. 2010).

Remarks. This species represents a transitional species between the two genera Seraphs and Paraseraphs based on the shape and form of the canal, which demonstrates the early stages of evolute terminal growth ( Jung 1974).

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).