Deuteralagena laguncula, 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 : 4

Deuteralagena laguncula n. gen., n. sp. ( Figs 2 H-P; 3A-F; 29O, P; 30A, B)

urn:lsid:zoobank.org:act:691D8771-82BB-4586-8DB1-7F05D3259139

HOLOTYPE. — Sample: Auxais T47, 14-17 m (MNHN.F.F67609).

PARATYPES. — Three paratypes: Sample: Auxais T47, 14- 17 m (MNHN.F.F67610); Sample: Auxais T47, 14-17 m (MNHN.F.F67611); Sample: LRK2, 30 m (MNHN.F.F67612).

DIAGNOSIS. — Test ovoid, ornamented with costae, neck distinct, subconical with small lip, aboral opening.

TYPE AGE. — Early Pleistocene.

TYPE LOCALITY. — Auxais (Manche).

ETYMOLOGY. — From Latin lăguncŭla (small carafe).

OTHER MATERIAL EXAMINED. — Sample: Auxais T 47, 14-17 m ( MNHN.F.F67731), 2 specimens.

SIZE. — Length = 0.610 mm; diameter = 0.240 mm

OCCURENCE. — Marls from Auxais (Manche) and Brest-LRK2 (Finistère).

DESCRIPTION

Test ovoid, elongated, aboral end ornamented with longitudinal costae (8) extending up to the midheight; neck slightly conical; wall hyaline, smooth, finely perforate; aperture rounded with a small striated lip; aboral end structure.

Figures

FIG. 2. —A-G, Deuteralagena elegans n.gen.,n. sp.,Auxais:A-C, holotype in lateral,oral and basal views (MNHN.F.F67607);D-G, paratype,Auxais (MNHN.F.F67608); D, lateral view;E, pores;F, G, oral and basal views;H-P, Deuteralagena laguncula n. gen.,n. sp.:H-L, holotype,Auxais (MNHN.F.F67609);H, lateral view,I, pores; J, K, oral views; L, basal view; M-O, paratype, Auxais (MNHN.F.F67610) in lateral, oral and basal views; P, paratype, Auxais (MNHN.F.F67611), in lateral view. Scale bars: A, D, H, M, P, 200 µm; B, C, F, G, I, J, L, N, O, 100 µm; I, K, 20 µm; E, 10 µm.