Lagena buchneri, 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 : 18

Lagena buchneri n. sp.

( Figs 12 A-H; 31F, G)

urn:lsid:zoobank.org:act:EF5BA659-33AF-474E-8107-9BDB4E729AF9

HOLOTYPE. — Sample: LRK2, 2.10 m (MNHN.F.F67651).

PARATYPE. — Sample: LRK2, 2.30 m (MNHN.F.F67652).

DIAGNOSIS. — Test ovoid ornamented with fine costae and distinct neck with reticulate ornamentation, apiculate base, aboral opening.

TYPE AGE. — Late Pliocene.

TYPE LOCALITY. — Brest-LRK2 (Finistère).

ETYMOLOGY. — In honour of Paul Buchner.

SIZE. — Length = 0.502 mm; diameter = 0.227 mm.

OCCURENCE. — Marls from Brest-LRK2.

DESCRIPTION

Test ovoid, ornamented with numerous longitudinal fine costae alternating with shorter (44) extend onto neck with reticulate shape; neck distinct consisting of a overlay of hexagonal-based chamberlets externally closed with punctate wall; aboral end with three apiculate rings; wall hyaline, punctate; aperture rounded; aboral end structure.

Figures

FIG. 12. — A-H, Lagena buchneri n. sp., Brest-LRK2: A-D, holotype (MNHN.F.F67651); A, lateral view; B, pores; C, D, oral and basal views; E-H, paratype (MNHN.F.F67652); E, lateral view; F, enlargement basal view; G, H, oral and basal views; I-O, Lagena digitale Heron-Allen & Earland, 1932: I-L, la Chênelière (MNHN.F.F67653); I, lateral view; J, pores; K, L, oral and basal views; M-O, l’Épinay (MNHN.F.F67654); M, lateral view; N, pores; O, oral view. Scale bars: A, E, I, M, 200 µm; B, J, 2 µm; C, D, G, H, K, L, O, 100 µm; F, 20 µm; N, 10 µm.