title: Neelipleona and Symphypleona (Collembola) from a Sampling in the Mesovoid Shallow Substratum of the Sierra de Guadarrama National Park (Madrid and Segovia, Spain): Taxonomy and Biogeography
abstract: <i>Megalothorax minimus</i> (Neelidae) and <i>Sphaeridia pumilis</i> (Sminthurididae) had already been identified in surface sampling from Sierra de Guadarrama. In Europe, <i>Sminthurinus gisini</i> (Katiannidae) seems to be associated with environments at specific altitudes, and has little representation in this sampling. <i>Pygmarrhopalites custodum</i> Baquero and Jordana sp. nov. (Arrhopalitidae) coexists with two previously identified surface occurring species of the same family (<i>P. eleg
journal: Insects