Early evolutionary history of Monalaria (Mollusca: Gastropoda: Struthiolariidae) from the Palaeogene of New Zealand

Huang, D.-Y. &; Nel, A., December, 2008. New ‘Grylloblattida’ related to the genus Prosepididontus Handlirsch, 1920 Handlirsch, A. 1920. “Kapitel 7. Palaeontologie. C.”. In Schröder Handbuch der Entomologie, III, 117–304. G. Fischer, Jena.  Google Scholar] in the Middle Jurassic of China (Insecta: Geinitziidae). Alcheringa 32, 395–403. ISSN 0311-5518.

On the basis of well-preserved nearly complete specimens, two new genera and species Sinosepididontus chifengensis and Megasepididontus grandis, both closely related to the Early Jurassic geinitziid genus Prosepididontus, are described. The new material was collected from the Middle Jurassic Jiulongshan Formation near the Daohugou Village, Ningcheng County, Inner Mongolia, northeast China. New body and leg structures are described for these Chinese taxa. They were previously unknown in other Geinitziidae. The new data indicate that the extinct ‘Grylloblattida’ contained heterogenous groups.