Species

† Mesogryllus achelous (Westwood, 1854)

Nomenclature (4)

† Blattidium achelous Westwood, 1854: 396, fig. 26. (fossil)
Holotype; female; NHMUKI. 12302; deposited at: Natural History Museum, London (NHMUK); Durlston Bay, Dorset
Mesogryllus achelous (Westwood, 1854) in Handlirsch, 1906: 187.

Mesogryllus achelous (Westwood, 1854) in Zeuner, 1939: 187.
Mesogryllus achelous (Westwood, 1854) in Gorochov, Jarzembowski & Coram, 2006: 650.

Gorochov, A.V., Jarzembowski, E.A. & Coram, R.A. (2006) Grasshoppers and crickets (Insecta: Orthoptera) from the Lower Cretaceous of southern England. Cretaceous Research, 27, 641–662. Available at http://www.sciencedirect.com/science/article/pii/S0195667106000395
Handlirsch, A.P.J. (1906) Die fossilen Insekten und die Phylogenie der rezenten Formen. Ein Handbuch für Paläontologen und Zoologen. Engelmann, Leipzig, Vol. 1, Issues 3-4, 321–480, 481–640 pp. Available at http://www.biodiversitylibrary.org/item/26376

Westwood, J.O. (1854) Contributions to fossil entomology. The Quarterly Journal of the Geological Society of London, 10, 378–396, plates 46–48. Available at http://www.biodiversitylibrary.org/item/108853#page/518/mode/1up
Zeuner, F.E. (1939) Fossil Orthoptera, Ensifera. British Museum (Natural History), London, 321 pp.

Summary of taxonomic names by rank, showing valid extant names, fossil names, invalid names, and total counts.
Taxon	Valid names
Rank	Extant	Fossil	Invalid	Total
Species	0	1	1	2