Species

Ducetia crosskeyi Ragge, 1961

Nomenclature (4)

Ducetia crosskeyi Ragge, 1961: 192.
Holotype; male; d6d11d4c-4cb1-4895-aa74-2c9a4d66118f; deposited at: Natural History Museum, London (NHMUK); Nigeria: Niger: Niger State, Diko
Ducetia crosskeyi Ragge, 1961 in Ragge, 1968: 84.

Massa, B. (2016) On some interesting African katydids (Orthoptera Tettigoniidae). Entomologia, 4(303), 1–15. Available at http://entomologia.pagepress.org/index.php/entomologia/article/view/303
Ragge, D.R. (1961) A revision of the genus Ducetia Stål (Orthoptera: Tettigoniidae). Bulletin of the British Museum (Natural History) Entomology, 10(5), 171–208. Available at http://www.biodiversitylibrary.org/page/2242458

Ragge, D.R. (1968) An index-catalogue of African Phaneropterinae (Orthoptera: Tettigoniidae). Bulletin of the British Museum (Natural History) Entomology, 22(3), 75–108. Available at http://www.archive.org/details/bulletinofbritis22entolond
Ragge, D.R. (1980) A review of the African Phaneropterinae with open tympana (Orthoptera: Tettigoniidae). Bulletin of the British Museum (Natural History) Entomology, 40(2), 67–192. Available at http://www.archive.org/details/bulletinofbritis40entolond

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	1	0	0	1