Ameronothridae, Vitzthum, 1943

Ermilov, Sergey G., Stary, Josef & Block, William, 2012, Morphology of juvenile instars of Ameronothridae (Acari: Oribatida), Zootaxa 3224 (1), pp. 1-40 : 38

Key to genera of known nymphal Ameronothridae

1. Gastronotic surface with sclerites and folds................................................................ 2

- Gastronotic surface only with folds...................................................................... 4

2. Eighteen or more gastronotic sclerites present; all gastronotic setae short or only setae h 1 – h 3 longer than others.......... 3

- Fewer than 16 gastronotic sclerites present; often gastronotic seta h 2 longer than h 1 and h 3 (exceptions: many gastronotic setae long or all setae short).............................................................. Halozetes -species group 1 ( H. capensis Coetzee & Marshall ; H. intermedius Wallwork ; H. littoralis Wallwork ; H. macquariensis (Dalenius) ; H. marinus marinus (Lohmann) ; H. marinus devilliersi Engelbrecht ; H. marinus minor Wallwork ; H. plumosus Wallwork ; H. necrophagus Wallwork )

3. Interlamellar seta approximately three times longer than rostral seta; interlamellar seta clearly longer than their mutual distance.............................. Alaskozetes ( A. antarcticus antarcticus (Michael) , A. antarcticus intermedius Wallwork )

- Interlamellar seta approximately twice the length of rostral seta; interlamellar seta as long as their mutual distance or shorter.......................................... Podacarus ( P. auberi auberti Grandjean ; P. auberi occidentalis Wallwork )