Original description Iakovleva 2025:

Oligokolpoma agniniae sp. nov.
Plate V, 1-21
Etymology: Named for Dr. Claudia Agnini in recognition of her achievements in marine micropaleontology (coccolithophora), University of Padova, Italy, and project leader of the Alano GSSP project.
Type locality and horizon: Sample A7321, level 73,21 m, Alano di Piave section, Italy.
Holotype: Plate V, figs. 1–5; Sample A7321, slide 2, EF = N30–2.
Paratype: Plate V, figs. 6–9; Sample A7021, slide 2, EF = F29–4.
Studied material: Alano di Piave section, Italy.
Stratigraphic horizon: Lower Priabonian.
Diagnosis: Cribroperidinioid acavate chorate cysts with a spheroidal finely shagrinate central body, bearing two types of hollow processes: 12 cylindrical, faintly striated, hollow, distally open pre- and postcingular processes, and one bell-shaped, faintly striated, distally closed, antapical process. Archeopyle apical, Type tA (free).
Description:
Shape: (sub)sphaerical.
Wall relationships: Autophragm only.
Wall features: The central body is faintly shagrinated.
Processes: Pre- and postcingular processes are of medium length, significantly vary in width, cylindrical, faintly striated, hollow, and distally open. The apical process is distally closed, bell-shaped, ornamented by almost invisible spines.
Paratabulation: Gonyaulacoidean, indicated by intratabular processes and archeopyle, one process per plate.
Archeopyle: Apical, with angular margin, Type tA (free).
Paracingulum: Characterized by the absence of processes.
Parasulcus: Expressed by one small and narrow process.
Dimensions: Holotype. 38 × 40 μm (central body), overall ∼ 55 μm; Paratype. 36 × 38 μm (central body), overall ∼ 54 μm. Total central body diameter ∼ 34–42 μm, total length/width overall ∼ 48–62 μm (10 specimens).
Comaprison: Oligokolpoma agniniae sp. nov. differs from other species of this genus by its distally closed, bell-shaped antapical process.