Several species of Mortierella described until 1930 are today unknown since living cultures are unavailable. The diagnoses of most of these species have been reproduced by Linnemann (in Zycha & Siepmann, 1970). but it is difficult to assess the justification of their retention. Recently Kuhlman & Hodges (1972) rediscovered M. rostafinskii Bref. and M. strangulata Tiegh., two similar but distinct species. This contribution concerns the rediscovery of another so far problematic species. During the study of the fungal flora of the Heseper Moor near Meppen, Niedersachsen, F. R. G., Mortierella turficola Ling Yong (1930) was found to be the predominating Mortierella species. A stand of Sphagnum recurvum P. Beauv. with some Eriophorum vaginatum L. (pH c. 4.8) was sampled on 28 June 1976 during a very hot period. Warcup’s soil plates were poured from various zones of decaying Sphagnum plants. Mortierella turficola appeared on 75% of the plates from the yellow zone at the foot of the living plants, on 85-100% of the plates from the underlaying brown zone and on 0-25% of the plates from the next, yellow zone at 8-10 cm below the surface of the living plants. Mortierella exigua Linnem. was once found in addition to M. turficola.