Lanternalagena crassicarinata n. gen., n. sp. (Figs 23 A-H; 33E, F)

urn:lsid:zoobank.org:act: D3D68553-C0FE-40B9-93DB-EA2C9293B2C3

HOLOTYPE. — Sample: la Groussinière S6, 16.40-16.90 m (MNHN.F.F67703).

PARATYPE. — Sample: la Sautré, 15.00 m (MNHN.F.F67704).

DIAGNOSIS. — Test ovoid ornamented with large costae, conical reticulate neck, aboral opening.

TYPE AGE. — Early to basal Late Pliocene.

TYPE LOCALITY. — La Groussinière (Ille-et-Vilaine).

ETYMOLOGY. — From Latin crassus cărĪna (hull shape).

OTHER MATERIAL EXAMINED. — Sample: la Groussinière S6, 16.40- 16.90 m (MNHN.F.F67764), 4 specimens.

SIZE. — Length = 0.541 mm; diameter = 0.263 mm.

OCCURENCE. — Sandy marls from la Groussinière (Ille-et-Vilaine) and marls from la Sautré (Maine-et-Loire).

DESCRIPTION

Test ovoid ornamented with longitudinal large costae (9); neck conical surrounded with chamberlets closed with punctate walls and polygonal ornamentation; wall hyaline, perforate particularly adjacent to the costae; aperture rounded with striated rim; aboral end structure.