Hyalinonetrionella sidebottomi, 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 : 16

Hyalinonetrionella sidebottomi n. gen., n. sp. ( Figs 9 C-M; 30M, N)

urn:lsid:zoobank.org:act:B10AA123-6C4B-4E87-89B1-F7103F94AE96

Lagena semistriata – Sidebottom 1904: 3, pl. 1, fig. 5 (non fig. 4).

Lagena laevis forma laevis – Buchner 1940: 416, pl. 3, figs 34, 35 (non fig. 36).

HOLOTYPE. — Sample: LRK2, 2.20 m (MNHN.F.F67638).

PARATYPE. — Sample: LRK2, 2.20 m (MNHN.F.F67639).

DIAGNOSIS. — Test fusiform, basal part rounded, aperture rounded with a distinct lip, aboral opening.

TYPE AGE. — Upper Pliocene.

TYPE LOCALITY. — Brest-LRK2 (Finistère).

ETYMOLOGY. — In honour of Henry Sidebottom.

OTHER MATERIAL EXAMINED. — Sample: LRK2, 2.20 m ( MNHN.F.F67740), 1 specimen.

SIZE. — Length = 0.375 mm; diameter = 0.114 mm.

OCCURENCE. — Marls from Brest-LRK2.

DESCRIPTION

Test fusiform, inflated; aboral end ornamented with spines; oral aperture with everted lip: wall hyaline, smooth, perforate; aperture rounded; aboral end structure.

Figures

FIG. 9. — A, B, Hyalinonetrion gracillimum (Seguenza, 1862), Auxais (MNHN.F.F67637), oral and basal views; C-M, Hyalinonetrionella sidebottomi n. gen., n. sp., Brest-LRK2: C-G, holotype (MNHN.F.F67638); C, lateral view; D, pores; E, enlargement base; F, G, oral and basal views; H-J, paratype (MNHN.F.F67638) in lateral,oral and basal views; K-M, paratype (MNHN.F.F67639), lateral, oral and basal views;N-P, Hyalinonetrionella sp., Brest-LRK2 (MNHN.F.F67640):N, lateral view; O, enlargement, oral end; P, oral view. Scale bars: A-C, H, K, 100 µm; F, G, I, J, L, M, P, 50 µm; D, 5 µm; E, O, 20 µm; N, 200 µm.