Paracerella

Shrubovych, Julia & Smykla, Jerzy, 2012, Review of Paracerella Imadaté (Protura: Acerentomidae, Nipponentominae) with identification key and description of a new species, Zootaxa 3509, pp. 69-76 : 75-76

Key to Paracerella species

1. Tergites I–VI with seta P1a, sternite I with 4 posterior setae.................................................... 2

– Tergites I–VI without seta P1a, sternite I with 2 posterior setae.............................................................................................. P. monterey Shrubovych sp. nov. ( Monterey County, California, USA)

2. Tergite VII with 8 A -setae and without seta P1a, tergite VIII with 6 A -setae......................................................................................... P. americana Imadaté, 1980 (San Mateo County, California, USA)

– Tergite VII with 6 A -setae and with P1a seta, tergite VIII with 4 A -setae...... P. s h i r a t k i ( Imadaté, 1964) (Hokkaido, Japan).