Family PSEUDONERINEIDAE Pchelintsev, 1965 (Fig. 2A)

Pseudonerineidae Pchelintsev, 1965: 14 (pars).

Tubiferidae Cossmann, 1896: 12 (pars).

Eparcy (Aisne, France), MNHN.F ; I, Fibuloptyxis undans, Bathonian,Eparcy ( Aisne, France), MNHN.F.A50556 ; J, Fibuloptyxis elegans convexa Fischer, 1960, Bathonian, Eparcy (Aisne, France), holotype MNHN.F. A24494 ; K, L, Aphanoptyxis munieri (Rigaux & Sauvage,1868), Bathonian, Bucilly (Aisne, France), MNHN.F.A49001 ; M, Aphanoptyxis munieri, base of specimen figured by Fischer 1969, Bathonien, Bucilly (Ardennes, France), MNHN.F.R00255. Scale bars: 10 mm .

TYPE GENUS. — Pseudonerinea de Loriol, 1890 (1890:81) .

TYPE SPECIES. — P. blauensis de Loriol, 1890 (1890: 11) .

FAMILY CHARACTERS . — Shell narrow turriculate. Whorls flat to moderately convex. Aperture drop-shaped, basal excavation of aperture broad but shallow. Columella straight, without internal plaits.

REMARKS

The broadly excavated base of Pseudonerinea clytia (d’Orbigny, 1851) (Fig. 2A) is typical for Pseudonerineidae, whereas the Ceritellidae possess a deep basal notch. Because of these differences, which suggest different life habits, the two groups are considered as separate families in contrast to earlier taxonomic subdivisions.