Lagena substriata Williamson, 1848

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 : 24-26

Lagena substriata Williamson, 1848 ( Figs 17 G-M; 32B, C)

Lagena vulgaris var. substriata Williamson, 1848: 7 , fig. 14.

LOCALITIES. — Brest-LRK2 (Finistère), la Groussinière (Ille-etVilaine).

MATERIAL EXAMINED. — Sample:LRK2, 3.30 m ( MNHN.F.F67675); sample: la Groussinière S6, 20.30-22.45 m ( MNHN.F.F67676); sample: LRK2, 3.30 m ( MNHN.F.F67754), 4 specimens; sample: LRK2, 2.40 m ( MNHN.F.F67755), 4 specimens.

AGE. — Late Pliocene.

DESCRIPTION

Test ovoid, elongated, ornamented with longitudinal fine costae (27 to 30), a few extend on the neck; wall hyaline, punctate; aperture rounded; aboral end structure.

Figures

FIG. 17. — A-F, Lagena striatareticulata n. sp., la Sautré, paratypes: A-C, MNHN.F.F67672 in lateral, oral and basal views; D-F, MNHN.F.F67673 in lateral, oral and basal views; G-M, Lagena substriata Williamson, 1848: G-J, Brest-LRK2 (MNHN.F.F67674): G, lateral view; H, perforated wall; I, J, oral and basal views; K-M, la Groussinière (MNHN.F.F67676) in lateral, oral and basal views; N-Q, Lagena sulcata (Walker & Jacob, 1798), SGB3 (MNHN.F.F67677): N, O, lateral and oral views; P, perforated wall; Q, basal view. Scale bars: A, D, G, K, N, 200 µm; B, C, E, F, I, J, L, M, O, Q, 100 µm; H, 20 µm; P, 10 µm.