(en) R. Haude, « Mode of life of ophiocistioids (Echinozoa) according to plated and "naked" forms in the Rhenish Devonian », Echinoderms: Munchen, Proceedings of the 11th International Echinoderm Conference, , p. 409–416 (DOI10.1201/9780203970881.ch67, lire en ligne).
doi.org
dx.doi.org
(en) R. Haude, « Mode of life of ophiocistioids (Echinozoa) according to plated and "naked" forms in the Rhenish Devonian », Echinoderms: Munchen, Proceedings of the 11th International Echinoderm Conference, , p. 409–416 (DOI10.1201/9780203970881.ch67, lire en ligne).
(en) Imran A. Rahman, Jeffrey R. Thompson, Derek E. G. Briggs, David J. Siveter, Derek J. Siveter & Mark D. Sutton, « A new ophiocistioid with soft-tissue preservation from the Silurian Herefordshire Lagerstätte, and the evolution of the holothurian body plan », Proceedings of the Royal Society B, vol. 286, no 1900, (DOI10.1098/rspb.2018.2792, lire en ligne).
(en) Imran A. Rahman, Jeffrey R. Thompson, Derek E. G. Briggs, David J. Siveter, Derek J. Siveter & Mark D. Sutton, « A new ophiocistioid with soft-tissue preservation from the Silurian Herefordshire Lagerstätte, and the evolution of the holothurian body plan », Proceedings of the Royal Society B, vol. 286, no 1900, (DOI10.1098/rspb.2018.2792, lire en ligne).
uni-goettingen.de
geomuseum.uni-goettingen.de
(en) M. Reich et R. Haude, « Ophiocistioidea (fossil Echinodermata): an overview », Echinoderms: Munchen, (lire en ligne).