Lanternalagena novocrassicarinata, Margerel, 2023

Margerel, Jean-Pierre, 2023, The species of Lageninae Brady, 1881 (Foraminifera) from the Pliocene-Early Pleistocene of north-western France, Fécamp (Seine-Maritime, France) and St Erth (Cornwall, United Kingdom), Geodiversitas 45 (1), pp. 1-53 : 36

Lanternalagena novocrassicarinata n. gen., n. sp. ( Figs 23 I-P; 24A-C; 33I, J)

urn:lsid:zoobank.org:act:59DC43BD-3403-4950-AC6A-DB695E0BD1AE

HOLOTYPE. — Sample: la Sautré, 5.00 m (MNHN.F.F67705).

PARATYPES. —Two paratypes:Sample:Fécamp 2A (MNHN.F.F67706); sample: la Groussinière S6, 16.40-16.90 m (MNHN.F.F67707).

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

TYPE AGE. — Early Pliocene.

TYPE LOCALITY. — La Sautré (Maine-et-Loire).

ETYMOLOGY. — From Latin novus (new), crassus (thick) and cărĪna (hull shape).

OTHER MATERIAL EXAMINED. — Sample: la Sautré S6, 16.40-16.90 m ( MNHN.F.F67765), 6 specimens.

SIZE. — Length = 0.460 mm; diameter = 0.259 mm.

OCCURENCE. — Marls from la Sautré (Maine-et-Loire), sandy marls from la Groussinière and crags (faluns) from Fécamp (Seine-Maritime).

DESCRIPTION

Test ovoid ornamented with large longitudinal costae (10); neck conical surrounded with chamberlets closed with punctate wall and polygonal ornamentation; wall hyaline, perforate; aperture rounded with striated rim; aboral end structure.

Figures

FIG. 23. — A-H, Lanternalagena crassicarinata n. gen., n. sp.; A-D, la Groussinière, holotype (MNHN.F.F67703); A, lateral view; B, perforated wall; C, D, oral and basal views; E-H, la Sautré, paratype (MNHN.F.F67704): E, lateral view; F, perforated wall; G, H, oral and basal views; I-P, Lanternalagena novocrassicarinata n. gen., n. sp.: I-L, la Sautré, holotype (MNHN.F.F67705);I, lateral view; J, perforated wall; K, L, oral and basal views; M-P, Fécamp, paratype (MNHN.F.F67706); M, lateral view; N, perforated wall; O, P, oral and basal views. Scale bars: A, E, I, M, 200 µm; B, F, 20 µm; C, D, G, H, K, L, O, P, 100 µm; J, N, 50 µm.