Altitudinal distribution range of species of Sphaeriidae: P. amnicum (Kuiper 1972, Hubenov 2007); P. casertanum (Mouthon 1983); M. lacustre (Piechocki 1989); P. personatum (Kuiper et al. 1989); P. subtruncatum (Clewing et al. 2013) (the crossmarks and the horizontal bars on the boxes refer to the mean and median, respectively).

  
  Part of: Rassam H, Ghamizi M, Benaissa H, Clewing C, Albrecht C (2021) The fingernail clams (Bivalvia: Veneroida: Sphaeriidae) of Morocco: Diversity, distribution and conservation status. Biodiversity Data Journal 9: e73346. https://doi.org/10.3897/BDJ.9.e73346