Discoaster musicus
Set number: 3865
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10µm
In the mobile mount.
Set number: 3864
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10µm
Discoaster musicus Stradner, 1959
1985 Catinaster sp. – Perch-Nielsen, p. 479, Fig 34.4
2002 Catinaster sp. sensu Parch-Nielsen, 1985. – Svábenická,, 2002, Pl.7, Figs. 13-14
Emended description: Species have six parallel-sided arms that terminate in notches. The length of the arms is much shorter than the diameter of the central area (about half). The distal side of the relatively large central area is ornamented with prominent sutural ridges created by deep cavities and blanketed by distal covers. In contrast, the proximal ridges adorn the bulged proximal side of the central area. A slightly different orientation produces a unique look; therefore, restricting the identification in one orientation will create conflicting stratigraphic ranges.
Discoaster musicus differs from a similar-sized Discoaster sanmiguelensis by having proximal ridges, whereas ridges make a proximal platform in Discoaster sanmiguelensis. Discoaster musicus is distinguished from Discoaster vandekampiorum by having segments with non-tapering arms.
Varol, O. & Bowman, A. R. 2024. The New Middle Miocene Genus Olladiscoaster, and Related and Associated Discoasters. Grzybowski Foundation Special Publication, 28: 1-103 pp.
Holotype
Discoaster musicus
Stradner, 1959
Late Miocene
Frättingsdorf, Austria.