Miniseraphs 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 : 421

Miniseraphs Jung, 1974 [Maxwell, this paper] nomen cladi conversum

( Seraphsinae )

Figure 6B, C

1974 Miniseraphs Jung , p. 29. Caze et al. 2010, p. 448 .

Type. Terebellum (Seraphs) eratoides Cossmann, 1889 by orginal designation ( Jung 1974).

RegNum Registration Number. 679.

Reference Phylogeny. Figure 3 .

Definition. The maximum clade consisting of Miniseraphs eratoides ( Cossmann, 1889) and all species that share a more recent common ancestor with it than with Seraphs sopitus ( Brander, 1766) , Diameza fragilis ( Defrance, 1825) or Terebellum terebellum ( Linnaeus, 1758) .

Diagnosis. The shell is stout, involute, and has maximum width above mid-height. The posterior canal is absent. The labrum is undulating, extends to the spire, and has a wide apical angle. The suture is not channelled. The shell is smooth, with faint oblique grooves near the base of the columella. The columella is bent inwards at the base.

Composition. Miniseraphs contains two species detailed herein, and belongs to the Seraphsinae , but excludes Diameza and Seraphs .

Remarks. Geologically Miniseraphs is restricted to the Middle to early Eocene of Europe ( Jung 1974; Caze et al. 2010; Table 4). Miniseraphs has a strong biogeographical affinity to both Seraphs and Diameza , and is herein considered the intermediate descendant of both these complexes ( Jung 1974).

Figures

FIGURE 3. The clade Seraphsidae Jung, 1974 derived from character analysis and contextualised with the fossil record showing the ancestral Seraphsinae and crown clade Pseudoterebellinae both new subfamilies.

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.