Laevilagena guttaformis, 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 : 16

Laevilagena guttaformis n. gen., n. sp. ( Figs 10 B-I; 30O; 31A)

urn:lsid:zoobank.org:act:C8C6C524-46A0-4247-B785-7353CC6D294C

HOLOTYPE. — Sample: la Groussinière S6, 13.60-14.50 m (MNHN.F.F67641).

PARATYPE. — Sample: Mernel (MNHN.F.F67642).

DIAGNOSIS. — Test pear shape in outline, partly ornamented with costae; wall hyaline, punctate; aperture rounded with lip; aboral opening.

TYPE AGE. — Late Pliocene.

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

ETYMOLOGY. — From Latin Gutta (drop) and forma (form).

OTHER MATERIAL EXAMINED. — Sample: la Groussinière S15, 47.0- 44.50 m ( MNHN.F.F67741), 7 specimens.

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

OCCURENCE. — Sandy clay from la Groussinière (Ille-et-Vilaine) and crags from Mernel (Ille-et-Vilaine).

DESCRIPTION

Test pear shape in outline, drop-like, base slightly rounded, partly ornamented with longitudinal costae (10);wall hyaline,perforate; aperture rounded with small striated lip; aboral end structure.

Figures

FIG. 10. — A, Hyalinonetrionella sp., Brest-LRK2 (MNHN.F.F67640);B-I, Laevilagena guttaformis n. gen., n. sp.: B-E, holotype, la Groussinière (MNHN.F.F67641); B, lateral view;C, pores; D, E, oral and basal views; F-I, paratype, Mernel (MNHN.F.F67642): F, lateral view; G, pores; H, I, oral and basal views; J-P, Laevilagena pyriformis n. gen., n. sp., Mernel: J-M, holotype (MNHN.F.F67643): J, lateral view; K, pores; L, M, oral and basal views; N-P, paratype: N, lateral view; O, pores; P, oral view. Scale bars: A, C, 50 µm; B, F, J, N, 200 µm; D, E, H, I, L, M, P, 100 µm; G, K, O, 20 µm.