Diameza 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 : 420

publication ID

https://doi.org/ 10.11646/zootaxa.4990.3.1

publication LSID

lsid:zoobank.org:pub:70610FEE-4497-4804-817C-CEC2D66DDBFE

DOI

https://doi.org/10.5281/zenodo.5088434

persistent identifier

https://treatment.plazi.org/id/039B8783-8749-FFE3-FF1E-F11C117AFB09

treatment provided by

Plazi

scientific name

Diameza Deshayes, 1865
status

 

Diameza Deshayes, 1865 View in CoL [Maxwell, this paper] nomen cladi conversum

( Seraphsinae )

Figure 6A View FIGURE 6

1865 Diameza Deshayes View in CoL , p. 572. Cossmann 1889, p. 95. Jung 1974, p. 32. Bandel 2007, p. 138. Caze et al. 2010, p. 426 View Cited Treatment .

Type. Ovula fragilis Defrance, 1825, p. 132 (by monotypy).

RegNum Registration Number. 678.

Reference Phylogeny. Figure 3 View FIGURE 3 .

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

Diagnosis. The shell is involute and inflated. The maximum diameter of the shell is just above the midline of height. The parietal callus is weak. The labrum is thickened and sinuous, being protocyrt on the lower part of the shell, and opisthocyrt on the upper part. The labrum extends above the apex, and there is a rudimentary basal sinus. The shell is smooth, with a few indistinct basal oblique grooves. The columella is smooth, and mostly straight near the base.

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

Remarks. There is only one recognised member of Diameza . While closely related to Miniseraphs , the latter lacks the acute apex of Diameza . However, based on overall similarities, it is likely they both share a hitherto unknown common ancestor arising in the Thanetian, Palaeocene of Europe ( Jung 1974). While originally placed with Ovulidae Fleming , Diameza shows the rudimentary stromboidal notch and growth pattern more consistent with the Seraphsidae ( Cossmann 1904; Jung 1974). The clade Diameza Deshayes, 1865 has a restricted geological range of the Middle Eocene of Europe (Table 3).

Kingdom

Animalia

Phylum

Mollusca

Class

Gastropoda

Order

Littorinimorpha

Family

Seraphsidae

Loc

Diameza Deshayes, 1865

Maxwell, Stephen J., Rymer, Tasmin L. & Congdon, Bradley C. 2021
2021
Loc

Diameza

Caze, B. & Merle, D. & Pacaud, J. - M. & Martin, J. - P. 2010: 426
Bandel, K. 2007: 138
Jung, P. 1974: 32
Cossmann, M. 1889: 95
1889
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