Further new and little known species of ptyctimous mites (Acari, Oribatida) from Cameroon

Nineteen species of ptyctimous mites were found in 20 samples collected in Cameroon: 15 samples from the Southwest region, near the ocean, and 5 samples from the Northwest region, inland. Two new species: Euphthiracarus (Pocsia) inaequatus sp. n. and Steganacarus (Rhacaplacarus) alius sp. n. are described and figured. Six species are new to Cameroon. The so far unknown instars of Mesoplophora (Mesoplophora) invisitata Niedbała, 1983: larva, proto-, deuto-, and tritonymph are described. The deutonymph and tritonymph of M. (M.) invisitata are compared with the corresponding stages of the related species.