Verulagena turgida, 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 : 44-49

Verulagena turgida n. gen., n. sp.

( Figs 29 A-H; 34H-K)

urn:lsid:zoobank.org:act:1B3A98CE-8C38-4064-8EAF-05F24B204E81

HOLOTYPE. — Sample: la Sautré 15.00 m (MNHN.F.F67728).

PARATYPE. — Sample: l’Épinay 11.50 m (MNHN.F.F67729).

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

TYPE AGE. — Early Pliocene.

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

ETYMOLOGY. — From Latin turgĭdus (inflated).

OTHER MATERIAL EXAMINED. — Sample: la Sautré, 15.00 m ( MNHN.F.F67774, 4 specimens).

SIZE. — Length = 0.57 mm; diameter = 0.237 mm.

OCCURENCE. — Marls from la Sautré and l’Épinay (Maine-etLoire).

DESCRIPTION

Test ovoid ornamented with costae (17) below midpoint, tapering to oral end ornamented with short ridges, flat ring at aboral end; wall hyaline perforate; aperture rounded with radiate rim; aboral end structure.

Figures

FIG. 29. — A-H, Verulagena turgida n. gen., n. sp.: A-D, la Sautré, holotype (MNHN.F.F67728): A, lateral view; B, perforated wall; C, D, oral and basal views; E-H, l’Épinay, paratype (MNHN.F.F67729): E, lateral view; F, perforated wall;G, H, oral and basal views; I-L, Verulagena sp., la Pugle (MNHN.F.F67730):I, lateral view; J, perforated wall; K, L, oral and basal views;M, N, Deuteralagena elegans n. gen., n. sp., Auxais: M, basal internal view; N, enlargement of the aboral tube; O, P, Deuteralagena laguncula n. gen., n. sp., Auxais: O, basal internal view; P, enlargement of the aboral tube. Scale bars: A, E, I, 200 µm; B, F, J, P, 20 µm; C, D, G, H, K, L, M, O, 100 µm; N, 10 µm.