Malumella oblonga, 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 : 40

Malumella oblonga n. gen., n. sp.

( Figs 25 A-M; 33K, L)

urn:lsid:zoobank.org:act:3319974D-713F-4671-8D37-41DCCE036731

HOLOTYPE. — Sample: Mernel S212, 5.50 m (MNHN.F.F67711).

PARATYPES. — Two paratypes: Sample: Auxais T47, 12-14 m (MNHN.F.F67712); sample:Mernel S212, 5.50 m (MNHN.F.F67713).

DIAGNOSIS. — Test ovoid ornamented with numerous costae, aboral end granular; conical reticulate neck.

TYPE AGE. — Late Pliocene to Early Pleistocene.

TYPE LOCALITY. — Mernel (Ille-et-Vilaine).

ETYMOLOGY. — From Latin oblongus (oblong).

OTHER MATERIAL EXAMINED. — Sample: la Groussinière S17, 21.70- 19.20 m ( MNHN.F.F6766), 6 specimens.

SIZE. — Length = 0.545 mm; diameter = 0.225 mm.

OCCURENCE. — Falun from Mernel (Ille-et-Vilaine) and marls from Auxais (Manche).

DESCRIPTION

Test ovoid ornamented with costae (19), aboral end granular; neck conical surrounded with chamberlets closed with perforate wall and hexagonal ornamentation; wall hyaline, densely perforate; aperture rounded with a small radiate lip; aboral end structure.

Figures

FIG. 25. — A-M, Malumella oblonga n. gen., n. sp.: A-D, holotype, Mernel (MNHN.F.F67711); A, lateral view; B, perforated wall; C, D, oral and basal views; E-I, paratype, Auxais (MNHN.F.F67712); E, lateral view; F, perforated wall; G, H, oral and basal views; I, enlargement basal views; N-P, Malumella suboblonga n. gen., n. sp., la Bouillonnaie, holotype (MNHN.F.F67714): N, lateral view; O, perforated wall; P, perforated wall on the neck. Scale bars: A, E, J, L, N, 200 µm; B, F, K, M, O, 50 µm; C, D, G, H, 100 µm; I, 20 µm; P, 10 µm.