Syracosphaera origami (Cros and McGrane) Archontikis, Young, Cros, 2020

Species Syracosphaera origami (Cros and McGrane) Archontikis, Young, Cros comb. nov. HOL

Basionym: Anthosphaera origami Cros and McGrane 2014 J. Nannoplankton Res , vol. 34, p. 23– 25, Pl. 1, Figs. 1–4 View Fig View Fig View Plate 3 .

Synonymy: Daktylethra View in CoL aff. D. pirus (Kamptner) Bérard-Therriault et al. (1999), p. 271, Pl. 132, Fig. a.

Anthosphaera sp. type A (very ornamented; sp. nov. origami ?) Cros (2001), p. 81, Pl. 57, Figs. 1–2 View Fig View Fig .

Anthosphaera sp. type A (origami art) Cros and Fortuño (2002), p.150, Fig. 88A; Young et al. (2003) p. 90.

Anthosphaera origami sp. nov. (nomen nudum) Cros (2004), p. 26, Fig. 1. View Fig

Anthosphaera periperforata (Kleijne) Dimiza (2006), p. 82, Pl. XXVI, Fig. 5; Malinverno et al. (2008), p. 137, Fig. 110.

Anthosphaera origami sp. nov. McGrane (2007) (unpublished PhD thesis, invalid), p. 243, Pl. 25, Figs. 1 View Fig –6.

Description: Coccosphere, usually spherical, composed of c. 40–80 BCs and c. 5–10 CFCs, all ornamented. BCs elliptical with a two crystallites-width rim, which supports c. 10 robust radial struts of about three crystallites separated by large perforations. The perforate cycle supports a concave distal cover with a central triangular apical boss that is flattened parallel to the long axis of the coccolith. CFCs elliptical and their rim supports an ornamented arched process ending distally in c. 6 spine-like struts of crystallites and a central triangular apical spine. Within the arch, oblique buttress-like sets occur giving an ornamented appearance.

Dimensions: Coccosphere diameter c. 5 μm. BCs 1.0 μm–1.4 μm long x c. 0.8 μm wide. CFCs c. 1.0 μm wide with a distal process of c. 1.5 μm high.