Two new American species of Paraxenylla (Collembola: Hypogastruridae) and ecological notes Author Palacios-Vargas, José G. Author Janssens, Frans text Zootaxa 2006 1312 37 47 journal article 10.5281/zenodo.173898 61eaa0c9-4192-455a-bb40-ac6a5bddc5c0 1175­5326 173898 Key for the separation of the species of Paraxenylla 1 Ventral tube (v.t.) with 1 + 1 setae ................................................................................ 4 ­ v.t. with more than 1 + 1 setae....................................................................................... 2 2 v. t. with 2 + 2 setae.......................................................................................... P. mangle ­ v.t. with more than 2 + 2 setae....................................................................................... 3 3 v. t. with 3 + 3 setae ........................................................................................ P. arenosa ­ v.t. with 4 + 4 setae ....................................................................................... P. oceanica 4 Tenaculum with 3 teeth on each ramus; tibiotarsi with tenent hairs ............................. 5 ­ Tenaculum with 2 teeth on each ramus; tibiotarsi without tenent hairs .......................... ............................................................................................................ P. cubana sp. nov. 5 With 1 + 1 ventral setae on abdominal segment II....................................................... 6 ­ With more than 1 + 1 ventral setae on abdominal segment II....................................... 7 6 Very small species, less than 0.5 mm ; two antennal sensilla bigger than others ............ ........................................................................................................................... P.piloua ­ About 1 mm long; only one sensillum smaller than others ........................... P. lapazana 7 With a total of 7 tenent hairs; unguis with one teeth; 1 + 1 ventral setae on abdominal segment II; about 0.9 mm long ......... P. affiniformis ( sensu Gama & Deharveng, 1984 ) With only 4 tenent hairs; unguis with no teeth; 3 + 3 ventral setae on abdominal seg­ ment II; about 1.5 mm long........................................................... P. peruensis sp. nov.