Cephalopoda - Ellesmerocerida - Phthanoncoceratidae
Alternative spelling: Phtanoncoceratidae
Full reference: D. H. Evans and A. H. King. 1990. The Affinities of Early Oncocerid Nautiloids from the Lower Ordovician of Spitsbergen and Sweden. Palaeontology 33(3):623-630
Parent taxon: Ellesmerocerida according to B. Kröger et al. 2009
See also Dzik and Kiselev 1995, Evans and King 1990 and Kröger and Mutvei 2005
Sister taxa: Acaroceratidae, Antacaroceras, Balkoceratidae, Bambusoceras, Bathmoceratidae, Cyptendocerina, Cyrtocerinina, Ellesmeroceratidae, Ellesmeroceratina, Eocyckistomiceras, Eothinoceratidae, Huaiheceratidae, Hunyuenoceras, Parapalaeoceras, Plectronoceratidae, Plectronoceratina, Protocycloceratidae, Qiushougouceras, Rioceratidae, Rudolfoceratidae, Shideleroceratidae, Theskeloceras, Vassaroceras, Xiaoshaoceras
Subtaxa: Phthanoncoceras Valhalloceras
Ecology: nektobenthic carnivore
Distribution:
• Hunderum of Sweden (1 collection)
• Arenigian of Svalbard and Jan Mayen (1)
• Ordovician of Poland (2), Sweden (1)
Total: 5 collections each including a single occurrence