Probable remains of jellyfish (Cnidaria, Scyphozoa) from the lower Middle Triassic (Anisian) of Winterswijk, eastern Netherlands

Abstract

During recent years, regular round structures have been collected from the top of Bed 12 of the Vossenveld Formation (Lower Muschelkalk, lower Middle Triassic, Anisian) in the Winterswijk area, eastern Netherlands. These are here illustrated and described as probable remains of jellyfish.

Ichnotaxonomy of the Cambrian Spence Shale Member of the Langston formation, Wellsville Mountains, Northern Utah, USA

“…A cnidarian body fossil and ichnofossil interpretation is the most likely as there are reports of similar circular-shaped fossils interpreted as jellyfish body fossils (e.g., Hagadorn, Dott, & Damrov, 2002;Gaillard & others, 2006;Oosterink & Winkelhorst, 2013). Hagadorn, Dott, and Damrov (2002) and Gaillard and others (2006) illustrated jellyfish specimens with some of the internal morphology (e.g., gonads) and tentacles preserved, whereas other specimens only had concentric rings or slight deformation attributed to shrinkage and/or locomotive pulsation and localized downslope sliding, respectively.…”

“…Hagadorn, Dott, and Damrov (2002) and Gaillard and others (2006) illustrated jellyfish specimens with some of the internal morphology (e.g., gonads) and tentacles preserved, whereas other specimens only had concentric rings or slight deformation attributed to shrinkage and/or locomotive pulsation and localized downslope sliding, respectively. Oosterink and Winkelhorst (2013) specimens had concentric rings attributed to shrinkage and appeared to exhibit some internal morphology. The Spence Shale specimen lacks concentric rings to indicate pulsation, no deformation to indicate downslope sliding, or any discernible internal morphology.…”

Limuloid trackways from Permian-Triassic continental successions of North China

“…For example, most studies just reported specimens as Kouphichnium, without a specific name or any further details (e.g. Pollard, 1981;Demathieu and Oosterink, 1988;Gall and Grauvogel-Stamm, 1993;Beatty et al, 2006;Mickelson et al, 2006;Mickelson, 2010;Zonneveld, 2007;Lerner et al, 2007;Lovelace and Lovelace, 2012;Żyła et al, 2013;Oosterink and Winkelhorst, 2013). A few studies identified the ichnospecies, but with simple and sometimes unclear descriptions of specimens, such as Kouphichnium lithographicum (Bi et al, 1995;Thomson et al, 2016), K. gracilis Linck, 1949 (Gall andGrauvogel-Stamm, 2005) and K. isp.…”

A tetrapod swimming traceway from the Triassic of Winterswijk, the Netherlands

“…Much descriptive work has been done in recent years on the tetrapod fossil record of the Winterswijk Triassic. From the faunal list as presented by Oosterink & Winkelhorst (2013), most candidates can be readily omitted from consideration because of their small size. Also, the most recent additions to the tetrapod faunal list, Palatodonta bleekeri Neenan et al (2013) and Pararcus diepenbroeki Klein & Scheyer (2014), can be omitted from consideration for the same reason.…”