Verulagena partecostata, 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 : 44

Verulagena partecostata n. gen., n. sp. ( Figs 28 G-P; 34D, G)

urn:lsid:zoobank.org:act:2C682922-51FD-429C-9849-53B3128DC706

HOLOTYPE. — Sample: SSL S3, 2.30 m (MNHN.F.F67725).

PARATYPES. — Two paratypes: sample: SSL S3, 2.30 m (MNHN.F.F67726, F67727).

DIAGNOSIS. — Test ovoid ornamented in part with costae, neck ornamented at oral end with ridges.

TYPE AGE. — Early Pliocene.

TYPE LOCALITY. — Saint-Sulpice-des-Landes (Loire-Atlantique).

ETYMOLOGY. — From Latin partim (in part) and costa (costae).

OTHER MATERIAL EXAMINED. — Sample: la Pugle, 9.00 m ( MNHN.F.F67772), 13 specimens; sample: la Chênelière, 17.00 m ( MNHN.F.F67773), 13 specimens.

SIZE. — Length = 0.550 mm; diameter = 0.230 mm.

OCCURENCE. — Marls from la Pugle and la Chênelière (Maine-etLoire) and marls from SSL (Loire-Atlantique).

DESCRIPTION

Test ovoid ornamented with costae (14) below midpoint, tapering to oral end ornamented with short ridges, flat ring at aboral end; wall hyaline, perforate particularly adjacent to costae; aperture rounded; aboral end structure.

Figures

FIG. 28. — A-F, Verulagena maximaperforata n. sp.: A, B, paratype (MNHN.F.F67723) in oral and basal views; C-F, paratype, MNHN.F.F67724: C, lateral view, D, perforated wall; E, F, oral and basal views; G-P, Verulagena partecostata n. gen., n. sp.: G-J, holotype, SSL (MNHN.F.F67725); G, lateral view; H, perforated wall; I, J, oral and basal views; K-M, paratype, SSL (MNHN.F.F67726) in lateral, oral and basal views; N-P, paratype, SSL (MNHN.F.F67727) in lateral, oral and basal views. Scale bars: A, B, E, F, I, J, L, M, O, P, 100 µm; C, G, K, N, 200 µm; D, 50 µm; H, 5 µm.