1993 Catinaster sp. Aubry (pro parte), Pl. 3, Figs. 17-19; non-Pl. Pl. 2, Figs. 12, 16; non Pl. 3, figs. 11–15
1993 Catinaster coalitus (Martini & Bramlette, 1963). – Aubry, Pl. 3, Figs. 16, 20
2008 Catinaster sp. A - Denne, p.232, pl.2, figs. 5a-b.
2014 Catinaster virginianus Self-Trail, Pl. 1, Figs. 1-12; Pl. 1, Figs. 11-10; non Pl. 2, Figs. 1-3.
These hexagonal species have segments with very short arms, distinct proximal ridges without any knob on the bulged proximal side and sutural ridges created by the deep cavities on the distal side. The sutural ridges are raised towards the centre and capped by boomerang-shaped distal covers.
From the Latin artatus, short - refers to the short free length of the segments.
Maximum diameter: 8.25 µm, Diameter of the central area: 4.77 µm, Length of arms: 1.74 µm, maximum thickness: 4.57 µm (measurements from bright field micrograph).
Discoaster artatus is distinguished from Discoaster self-trailiae, Discoaster virginianus and its variant, Discoaster gamberi, by lacking any proximal knob. Discoaster virginianus has a hexagonal proximal knob, whereas Discoaster self-trailiae has a petaloid proximal knob.
Varol, O. & Bowman, A. R. 2024. The New Middle Miocene Genus Olladiscoaster, and Related and Associated Discoasters. Grzybowski Foundation Special Publication, 28, 103 pp.