Gymnaster sirius
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"sirius" (Ehrenberg, 1841, p.150) Schütt, 1891, p.20. Holotype: not designated NOW Actiniscus. Originally Dictyocha subgenus Actiniscus, subsequently (and now) Actiniscus, thirdly Distephanus (name not validly published; Appendix A), fourthly Gymnaster. Dumitrică (1973, p.822) considered Dictyocha (now Actiniscus) pentasterius to be the questionable taxonomic senior synonym of this species. N.I.A. Age: Miocene.
Parent: Gymnaster