Laevilagena pyriformis n. gen., n. sp. (Figs 10 J-P; 11A-D; 31B, C)

urn:lsid:zoobank.org:act: 5EF65F20-69EE-4882-9DE9-61218DCE0B89

HOLOTYPE. — Sample: Mernel S212, 5.50 m (MNHN.F.F67643).

PARATYPES. — Two paratypes: Sample: Mernel S214, 8.50 m (MNHN.F.F67644); Sample: la Groussinière S6, 13.60-14.50 m (MNHN.F.F67645).

DIAGNOSIS. — Test pear-shaped in outline; partly ornamented with acute costae; wall hyaline, perforate; aboral opening.

TYPE AGE. — Late Pliocene.

TYPE LOCALITY. — Mernel (Ille-et-Vilaine).

ETYMOLOGY. — From Latin pirum (pear) and forma (form). MATERIAL EXAMINED. — Sample: Mernel S212, 5.50 m (MNHN.F.F67742), 6 specimens.

SIZE. — Length = 0.663 mm; diameter = 0.188 mm.

OCCURENCE. — Falun from Mernel and sandy clay from la Groussinière (Ille-et-Vilaine).

DESCRIPTION

Test, pear shape in outline, elongated, partly ornamented with longitudinal acute costae(12), base weakly rounded; wall hyaline, perforate; aperture rounded with striated lip; aboral end structure.