Reinterpretation of Baltic Ordovician Heckerites multistellatus Rozhnov, 1987 as a possible paracrinoid based on new material*
A reinterpretation of the solutan Plasiacystis mobilis (Echinodermata) from the Middle Ordovician of Bohemia*
Observations on Onychaster Meek & Worthen, 1868 (Ophiuroidea: Onychasteridae) (Famennian – Visean age)*