Distinctive Collembola Communities in the Mesovoid Shallow Substratum: Entomobryomorpha of the Sierra de Guadarrama National Park (Central Spain) Author Baquero, Enrique University of Navarra, Faculty of Sciences, Department of Environmental Biology, University Campus, 31080, Pamplona (Spain) ebaquero@unav.es Author Jordana, Rafael University of Navarra, Faculty of Sciences, Department of Environmental Biology, University Campus, 31080, Pamplona (Spain) rjordana@unav.es Author Ortuño, Vicente M. Grupo de Investigación de Biología del Suelo y de los Ecosistemas Subterráneos, Departamento de Ciencias de la Vida, Facultad de Ciencias, Universidad de Alcalá, E- 28871, Alcalá de Henares, Madrid (Spain) vicente. ortuno @ uah. es vicente.ortuno@uah.es text Zoosystema 2021 2021-01-26 43 3 37 78 journal article 8557 10.5252/zoosystema2021v43a3 cd89b152-32bd-42cc-be33-a74a856fb5e4 1638-9387 4487162 urn:lsid:zoobank.org:pub:EA621D7C-F9AE-460B-8EBF-9E932862D4FE Folsomia trisetata Jordana & Ardanaz, 1981 ( Fig. 5 ) Folsomia sexoculata trisetata Jordana & Ardanaz, 1981: 41 . MATERIAL EXAMINED. — Spain • 4 ♀ , 1 ♂ , on slide; SSD-14, slides 07, 08 and 13; Ortuño et al. leg; MZNA . REMARKS Until now, the distribution of this species was limited to the Pyrenean and pre-Pyrenean area ( Potapov 2001 ), although it has been found in the Cantabrian Mountains ( Santamaría et al. 2012 ). This new record adds a new biotope for the species, also in the mountains, but in the center of the Iberian Peninsula. The diagnostic characteristics are totally coincident with the original: antenna ( Fig. 5A ), head ( Fig. 5B ) and general chaetotaxy ( Fig. 5 C-E). Confirmation of the identity of the specimens found in the Sierra de Guadarrama was performed by comparing them with the type series specimens, and based on the presence of the three special long sensilla of the Abd V, which, in this case, are blunt ( Fig. 5C, F ), and the sensory chaetotaxy given by Potapov (2001) , which is identical ( Fig. 5F ). Since Potapov (2001) pointed out that this could be a synonym of F. trisetata due to the coincidence of the manubrial chaetotaxy (13 chaetae on F. sexoculata var. iberica Steiner, 1958 and 11- 12 F. trisetata), it would be necessary to study Steiner’s material (because at least seven Folsomia species have 13 chaetae in the manubrium ventral side).