In this paper we describe Cotylaspis nigeriensis sp. n., parasite of the African mud turtle, Pelusios castaneus Schweiger, 1812 and Pelusios sp. from Ondo State, South-Western Nigeria. The new species is distinguished from the eight previously described species by the body size, number of alveoli in the adhesive disc, size of the testis, among other features. It is distinguished from C. lenoiri Poirier, 1886 its African counterpart by host differences; C. lenoiri parasitizes the Senegal soft shell turtle Cyclanorbis senegalensis Duméril and Bibron, 1835 in Senegal and the African soft shell turtle Trionyx triunguis Forskål, 1775 in Egypt. Cotylaspis nigeriensis sp. n. like the type species C. insignis Leidy, 1857, C. malayensis Rohde, 1963 and C. parasinensis Belous, 1963 has 29 alveoli in the adhesive disc (20 peripheral and 9 median) as against C. cokeri Barker and Parsons, 1914 which has 32, C. coreensis Cheo et Seo, 1977 and C. sinensis Faust and Tang, 1936 which have 27, C. lenoiri Poirier, 1886 with 25, and C. stunkardi Rumbold, 1928 with 50 alveoli. Cotylapsis nigeriensis sp. n. is the second species from Africa and the ninth globally.

在本文中，我们描述了Cotylaspis nigeriensis sp。n.，非洲泥龟的寄生虫，Pelusios castaneus Schweiger，1812 和Pelusios sp。来自尼日利亚西南部翁多州。新物种与之前描述的八个物种的区别在于身体大小、粘性盘中的肺泡数量、睾丸的大小以及其他特征。它与C. lenoiri Poirier，1886 年非洲对应物的宿主差异不同；C. lenoiri寄生于塞内加尔软壳龟Cyclanorbis senegalensis Duméril 和 Bibron，1835 年在塞内加尔和非洲软壳龟Trionyx triunguis Forskål，1775 年在埃及。Cotylaspis nigeriensis sp. n. 喜欢的类型物种C.荚雷迪，1857年，C. malayensis罗德，1963年和Ç。parasinensis Belous, 1963 与C . cokeri Barker 和 Parsons，1914 年有 32 个，C. coreensis Cheo et Seo，1977 年和C. sinensis Faust 和 Tang，1936 年有 27 个，C. lenoiri Poirier，1886 年有 25 个，C . stunkardi Rumbold，1928 年，有 50 个肺泡。Cotylapsis nigeriensis sp. n. 是来自非洲的第二个物种，也是全球第九个物种。