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You are here: Home / Library / RBINS Staff Publications 2017 / Late Devonian (Frasnian) phyllopod and phyllocarid crustaceanshields from Belgium reinterpreted as ammonoid anaptychi

Stijn Goolaerts, Julien Denayer and Bernard Mottequin (2017)

Late Devonian (Frasnian) phyllopod and phyllocarid crustaceanshields from Belgium reinterpreted as ammonoid anaptychi

The Science of Nature, 104(98):1-8.

The taxonomic affinities of fossils from theFrasnian succession of Be lgium previously described asphyllopod and phyllocarid crustacean shields are discussed.The rediscovery of the holotype of Ellipsocaris dewalquei,the type species of the genus Ellipsocaris Woodward inDewalque, 1882, allows to end the discussion on the taxo-nomic assignation of the genus Ellipsocaris. It is removedfrom the phyllopod crustaceans as interpreted originally andconsidered here as an ammonoid anaptychus. Furthermore, itis considered to be a junior synonym of the genus SidetesGiebel, 1847. Similarly, Van Straelen’s (1933) lower to middleFrasnian record Spathiocaris chagrinensis Ruedemann, 1916,is also an ammonoid anaptychus. Although ammonoids canbe relatively frequent in some Frasnian horizons of Belgium,anaptychi remain particularly scarce and the attribution to thepresent material to peculiar ammonoid species is not possible.
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