Palaeos Metazoa: Mollusca: Paragastropoda: Dendrogram

The following dendrogram represnts one possible phylogeny, by no means the only one, maybe nort even the most likely. It's posted here until a proper revision can be made. MAK120617

■──○Helcionelloida ├─Helcionella subrugosa ├─Oelandia rugosa └─┬─Latouchella merino └─┬─Coreospirida └─┬─┬─Euomphalopsis involuta │ └─Macluritella? walcotti └─┬─○Paragastropoda │ ├─○Pelagiellida (= Pelagielloidea) │ │ └─○Pelagiellidae │ │ ├─Costipelagiella zazvorkai │ │ └─Pelagiella subangulata │ └─○Mimospirida (= Onychochiloidea) │ ├─○Onychochilidae │ │ ├─"Maclurites" thomsoni │ │ └─┬─Scaevogyra swezeyi │ │ └─┬─Kobayashiella circe │ │ └─○Matherella/Matherellina │ │ ├─Matherellina walcotti │ │ └─Matherella saratogensis │ ├─○Cliospiridae │ │ ├─Cliospirinae │ │ ├─Trochoclisinae │ │ └─Atracurinae │ ├?─Omphalocirridae (gastropod or paragastropod) │ ├?─Macluritidae (probably stem or possibly crown-group gastropods, possibly paragastropod) │ └─○Yangtzespiriidae └─┬─BELLEROPHONTOIDEA (torted) └─┬?─Euomphaloidea (if stem gastropod, may be crown-group, very possibly paragastropod) └─Gastropoda (crown group)

Peter Wagner [no date] Outgroups (website at http://pjw3.fmnh.org no longer current)
Paul Jeffery [no date] Suprageneric classification of Class Gastropoda (website at http://www.nhm.ac.uk/palaeontology/i&p/gastroclass/gastroclass.htm no longer current)
Linsley and Kier 1984 pp.250-1

page uploaded 25 February 2003,
last modified ATW060227; dendrogram revised MAK120617
checked ATW050720
original material by M. Alan Kazlev all other material © original authors or sources

		Conchifera └─Helcionelloida └─►
	◄─┬─Pelagiellida └─Mimospirida	Mollusca