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- W4385605806 abstract "The Lower Ordovician Fezouata Shale is renowned for its exceptionally-preserved euarthropod fossils including numerous species of trilobites, some of which show remains of appendages and traces of the digestive system. Herein, we describe the early developmental stages of at least nine trilobite species from the Tremadocian strata of the Fezouata Shale, namely Platypeltoides magrebiensis, Nileus deynouxi, Symphysurus ebbestadi, Asaphellus sp., Megistaspis (Ekeraspis) hammondi, Orometopus sp., Anacheirurus adserai, Bavarilla zemmourensis, Indiligens sp., and several specimens of undetermined protaspides. This study considerably expands our knowledge of the development of early Ordovician trilobites. The preservation of appendages in the early stages of N. deynouxi and S. ebbestadi, and remains of the digestive tract in the latter species, suggests that some immature trilobites had similar morphology and anatomy as the adult individuals. Early developmental stages of Indiligens sp. might have fed and/or hidden on graptolites and demosponges. The extraordinarily large size of the early post-embryonic stages of P. magrebiensis, S. ebbestadi, Orometopus sp., Asaphellus sp., and undetermined protaspides suggests that these trilobites might have hatched from yolk-rich eggs. The presence of several trilobite species with notably large post-embryonic stages in the Fezouata Shale might be explained by seasonal or low productivity in the high-latitude margin of Gondwana." @default.
- W4385605806 created "2023-08-06" @default.
- W4385605806 creator A5060304235 @default.
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- W4385605806 creator A5072473651 @default.
- W4385605806 creator A5072713727 @default.
- W4385605806 date "2023-08-01" @default.
- W4385605806 modified "2023-10-03" @default.
- W4385605806 title "Babies from the Fezouata Biota: Early developmental trilobite stages and their adaptation to high latitudes" @default.
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