ammonites
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Fontannesia (ammonite)

Cephalopoda - Ammonitida - Sonniniidae

PaleoDB taxon number: 14899

Synonyms: Darellella Buckman 1904 (no. 257999), Nannina Buckman 1927 (no. 258002), Nannoceras Buckman 1923 (no. 258001)

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

Sister taxa: Asthenoceras, Guhsania, Newmarracarroceras, Witchellia

Subtaxa: Fontannesia austroamericana, Fontannesia montillanensis

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Ecology: fast-moving nektonic carnivore