ammonites
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Pleydellia (ammonite)

Cephalopoda - Ammonitida - Hildoceratidae

PaleoDB taxon number: 15423

Invalid subtaxa: Canavaria Buckman 1902 [replaced name] (no. 257899), Canavarina Buckman 1904 (no. 257898), Cotteswoldia (no. 77149), Nadorites Elmi and Caloo-Fortier 1985 (no. 257902), Walkeria Buckman 1902 [replaced name] (no. 257901), Walkericeras Buckman 1913 (no. 257900)

Parent taxon: Grammoceratinae according to M. K. Howarth 2013

Sister taxa: Catulloceras, Dumortieria, Grammoceras, Hudlestonia, Phlyseogrammoceras, Podagrosites, Pseudogrammoceras, Pseudolillia, Shakraceras, Troitsaia, Yakounia

Subtaxa: Cotteswoldia aalensis, Cotteswoldia distans, Cotteswoldia fluitans, Cotteswoldia lotharingica, Cotteswoldia mactra, Cotteswoldia subcompta, Pleydellia (Pleydellia), Pleydellia arkelli, Pleydellia buckmani, Pleydellia costulata, Pleydellia falcifer, Pleydellia leura, Pleydellia misera, Pleydellia subcompta

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Ecology: fast-moving nektonic carnivore