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Fig. 3 | Swiss Journal of Palaeontology

Fig. 3

From: Stereom microstructure of columnal latera: a character for assessing phylogenetic relationships in articulate crinoids

Fig. 3

Scale bar 100 μm unless indicated otherwise aEndoxocrinus parrae (Gervais). Recent. Detail of nodal columnal adjacent to cirral scar, showing minor variation in configuration of en echelon perforate stereom structure. BELUM K2010.1.2. bBalanocrinus subteroides (Quenstedt). Jurassic, Pliensbachian, Charmouth Mudstone Formation, Blockley, Gloucestershire, England. Columnal of pentacrinoid larva, with synarthrial articula, showing both labyrinthic and en echelon perforate stereom. BM E70553. Scale bar 150 μm. c Etched cleavage planes on columnal latus of Holocrinus dubius (Goldfuss). Triassic, Anisian, Jena Formation, Oberer Wellenkalk, Rittersdorf, Thuringia, Germany. Muschelkalkmuseum Ingelfingen. Scale bar 400 μm. d Etched cleavage planes on columnal latus of Holocrinus dubius (Goldfuss) showing development along them of lumina (?preservational artifacts). Triassic, Anisian, Jena Formation, Oberer Wellenkalk, Rittersdorf, Thuringia, Germany. Muschelkalkmuseum Ingelfingen. e Etched cleavage planes on columnal latus of ‘Isocrinus’ sp. Triassic, Rhaetian, Fatra Formation, Tatra Mountains, Slovakia. BELUM K2010.5.2. (from Peter Ledvák Collection). Scale bar 400 μm. f Etched cleavage planes on columnal latus of ‘Isocrinus’ sp. Triassic, Rhaetian, Fatra Formation, Tatra Mountains, Slovakia. BELUM K2010.5.2. (from Peter Ledvák Collection)

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