Miniseraphs isabella (Deshayes, 1865)

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 : 422

Miniseraphs isabella (Bernay in Deshayes, 1865)

Figure 6C

1865 Terebellum isabella Bernay — Deshayes, p. 470, pl. 92, figs. 14–16. Jung 1974, p. 30. Caze et al. 2010, p. 450. = Terebellum (Seraphs) isabellae Bernay — Cossmann 1889, p. 94. Jung 1974, p. 30. Caze et al. 2010, p. 450. = Seraphs (Miniseraphs) isabella Deshayes — Jung 1974, p. 30, pl. 9, figs. 13–18, tfs. 20, 21. = Diameza (Miniseraphs) isabella Deshayes — Caze et al. 2010, p. 450, figs. 20K–O, 23. = Seraphs isabella Deshayes — Bandel 2007, p. 137.

1880 Terebellum pusilliusculum de Gregorio , p. 23, p. 1, fig. 33. Jung 1974, p. 31. = Seraphs (Miniseraphs) pusilliusculum de Gregorio —Quaggioto & Mellini 2008, p. 48, pl. 1, fig. 33.

1953 Terebellum (Seraphs) vertesensis Szöts , p. 175, pl. 4, figs. 43, 44. Jung 1974, p. 31.

Type material. Neotype — MNHN A28935, was selected by Caze et al. (2010) to bring taxonomic clarity, given the lectotype designated by Jung (1974) from the Bernay Collection cannot be found. The missing Jung type measured 13.4 mm in length and a width of 7 mm ( Jung 1974).

Type locality. Chaussy , France [Lutetian] .

Diagnosis. The shell has a large apical angle and an inflated body whorl. The greatest diameter of the shell is just above the middle. The labial callus is thin, and the labrum is sinuous and thickened adapically. The labrum is abapically prosocyrt and adapically opisthocyrt. The columella is bent backward at the base and reaches down nearly to the base of the labrum. The siphonal notch is moderately developed. The shell is smooth with only a few faint spiral lines near the base.

Distribution. EOCENE—Lutetian/Bartonian— France Ferme de l’Orme, Paris Basin ( Jung 1974); Grignon, Paris Basin ( Jung 1974). Italy Palermo ( Jung 1974); San Giovanni Ilarione ( de Gregorio 1880). Lutetian— France Chaussy, Val d‘Oise, ( Jung 1974; Caze et al. 2010); Latinville-Saint-Peirre, Oise ( Jung 1974; Caze et al. 2010); Cauvigny, Oise ( Caze et al. 2010); Parnes, Oise ( Jung 1974; Caze et al. 2010); Mouchy-le-Chatel, Oise ( Jung 1974; Caze et al. 2010); Fercourt, Oise ( Jung 1974; Caze et al., 2010); Vaudancourt, Oise ( Jung 1974; Caze et al. 2010); Ponchon, Oise ( Caze et al., 2010); Villiers-St-Frédéric, Yvelines ( Caze et al. 2010); Bois-Gouët, Loire-Atlantique ( Caze et al. 2010). Ypresian— Hungary ( Szöts 1953).

Remarks. The two recognised members of Miniseraphs can be readily differentiated by size and shape, with M. isabella ( Deshayes, 1865) larger and slenderer than M. eratoides Cossmann, 1889 .

Figures

FIGURE 6. Dimeza Deshayes, 1865, Miniseraphs Jung 1974 and Mauryna de Gregorio 1880. A. Diameza fragilis (Defrance, 1825), MNHN A28784, Collection de Paleontologie, Paris, length 6.9 mm (Caze et al. 2010, figs. 20A, C & E). B. Miniseraphs eratoides (Cossmann, 1889), MNHN A28785, Collection de Paleontologie, Paris, length 8.3 mm (Caze et al. 2010, figs. 20F–H). C. Miniseraphs isabella (Deshayes, 1865), MNHN A28783, Collection de Paleontologie, Paris, length 7.5 mm (Caze et al. 2010, figs. 20M–O). D. Mauryna plicata (d’Archiac & Haime, 1853), NMB H15324, length 51 mm.