RT Journal Article T1 Filling the Silurian gap of solutan echinoderms with the description of new species of Dehmicystis from Spain A1 Zamora Iranzo, Samuel A1 Gutiérrez Marco, Juan Carlos AB Solutans were among the most enigmatic pre-radial and asymmetric echinoderms. A new species Dehmicystis ariasi sp. nov. is described from the upper part of the Llagarinos Formation, lower Ludlow (Silurian) of Northwest Spain. This is the first solutan formally described from Iberia and the first from the Silurian worldwide. Dehmicystis was previously known based on a small number of poorly preserved specimens from the Emsian, Lower Devonian Hunsrück Slate of Germany. New observations based on the newly studied material suggest that Dehmicystis displayed a feeding appendage facing towards the substrate, and the periproct on the opposite face of the theca. Comparisons with other solutans and new data suggest that Dehmicystis was a detritus feeder that moved over the substrate capturing organic particles from the sediment with a single feeding arm. PB Polish Academy of Sciences SN 0567-7920 YR 2023 FD 2023-05-09 LK https://hdl.handle.net/20.500.14352/87744 UL https://hdl.handle.net/20.500.14352/87744 LA eng NO Ministerio de Ciencia e Innovación NO European Regional Development Fund NO Gobierno de Aragón NO IGME-CSIC DS Docta Complutense RD 9 abr 2025