caa a22 4500 445839457 CHVBK 20180317145339.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1007/s00015-011-0059-z doi (NATIONALLICENCE)springer-10.1007/s00015-011-0059-z Life and death of Saccocoma tenella (G oldfuss ) [Elektronische Daten] [Hans Hess, Walter Etter] The morphology of the small stalkless Saccocoma tenella is unique among crinoids. It is characterized by an extremely light skeleton with dish-like lateral wings on the proximal brachials and peculiar paired vertical processes flanking the food grooves of more distal brachials. The arms are heavily branched. The lateral wings obviously were involved in vertical movement. For the vertical processes a "baffle rail” function for arm curling and "snap swimming” has been postulated, with muscles between the processes. However, there is no evidence that the processes were connected by muscles. For food collection a "pulsating funnel” model in the water column is advocated, with the processes serving to collect plankton during upward movement of the arms. The resulting mouth-up position is supported by the biostratinomy. Saccocoma tenella is considered to have been pelagic, a benthic lifestyle is rejected on ecologic and taphonomic grounds. Adorally-curled arms are considered a reaction to hostile environment before death, not a taphonomic artefact. Swiss Geological Society, 2011 Crinoidea nationallicence Saccocoma tenella nationallicence Tithonian nationallicence Biostratinomy nationallicence Functional morphology nationallicence NMB : Naturhistorisches Museum Basel nationallicence Hess Hans Naturhistorisches Museum Basel, Augustinergasse 2, 4001, Basel, Switzerland aut Etter Walter Naturhistorisches Museum Basel, Augustinergasse 2, 4001, Basel, Switzerland aut Swiss Journal of Geosciences SP Birkhäuser Verlag Basel 104(2011-12-01), 99-106 1661-8726 104<99 2011 104 15 https://doi.org/10.1007/s00015-011-0059-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00015-011-0059-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hess Hans Naturhistorisches Museum Basel, Augustinergasse 2, 4001, Basel, Switzerland aut NATIONALLICENCE 700 1- Etter Walter Naturhistorisches Museum Basel, Augustinergasse 2, 4001, Basel, Switzerland aut NATIONALLICENCE 773 0- Swiss Journal of Geosciences SP Birkhäuser Verlag Basel 104(2011-12-01), 99-106 1661-8726 104<99 2011 104 15 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer