Paraxenylla

Palacios-Vargas, José G. & Janssens, Frans, 2006, Two new American species of Paraxenylla (Collembola: Hypogastruridae) and ecological notes, Zootaxa 1312, pp. 37-47 : 44-45

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.