Non-arthropod invertebrates from the Middle Triassic of Winterswijk

This article covers all macroinvertebrates not ascribed to the Arthropoda found in the Muschelkalk (Middle Triassic, Anisian) of Winterswijk. The Muschelkalk contains 18 bivalve species, two gastropod species, two brachiopod species, one ammonite species, and a putative jellyfi sh taxon. Five bivalve species not previously photographed from Winterswijk are fi gured herein. Briefl y, we present the invertebrates known from the Upper Triassic shales and Lower Jurassic clays of Winterswijk. The invertebrates from the Muschelkalk suggest deposition in a hypersaline and stressed environment