Entomobrya, symbols used for chaeta types and pseudopore.

Entomobrya arenaria sp. nov. Habitus A adult specimen, dorsolateral view B same adult specimen ventral view C subadult specimen, dorsolateral view D same subadult specimen, dorsoventral view. Scale bars: 1 mm.

Entomobrya arenaria sp. nov. A head chaetotaxy B apex of Ant IV C Ant III sensillar organ D labrum with labral papillae, maxillary palp and sublobal plate E labial papilla E with lateral process (l.p.) F labial triangle, arrow indicates M₂ chaeta present or absent. Abbreviations: Ant = antennal segment. Scale bars: 0.05 mm (A); 0.02 mm (B, D); 0.03 mm (C, F); 0.01 mm (E).

Entomobrya arenaria sp. nov. A trochanteral organ B unguis and unguiculus of leg III C ventral tube anterior view (right side) and posterior view (left side), circles indicate ciliated chaetae D ventral tube lateral flap E manubrial plate F mucro. Scale bars: 0.05 mm (A, C); 0.03 mm (B, D, E–F).

Entomobrya arenaria sp. nov. A Th II dorsal macrochaetotaxy B Abd II dorsal macrochaetotaxy C Abd III dorsal macrochaetotaxy D Abd IV dorsal macrochaetotaxy. Abbreviations: Abd = abdominal tergite; Th = thoracic tergite. Scale bar: 0.05 mm.

Entomobrya arenaria sp. nov. Type locality in Pannonic sand steppe grassland (Fülöpháza, Hungary).

Entomobrya nigriventris. Habitus A adult specimen, dorsal view B same adult specimen, ventral view C adult specimen, dorsolateral view D juvenile specimen, dorsal view. Scale bars: 0.5 mm.

Entomobrya nigriventris A head chaetotaxy B labral papillae C trochanteral organ D unguis and unguiculus of leg III E Ventral tube anterior view (left side) and posterior view (right side), circles-ciliated chaetae F Manubrial plate G Th II dorsal macrochaetotaxy H Abd II dorsal macrochaetotaxy I Abd III dorsal macrochaetotaxy J Abd IV dorsal macrochaetotaxy. Abbreviations: Abd = abdominal tergite; Th = thoracic tergite. Scale bars: 0.03 mm (A, D–F); 0.02 mm (B); 0.05 mm (C, G–J).

Entomobrya nigriventris. Type locality (Simontornya, Hungary).

Entomobrya handschini. Habitus A dorsolateral view B ventral view (same specimen). Scale bars: 1 mm.

Entomobrya handschini A head chaetotaxy B trochanteral organ C unguis and unguiculus of leg III D manubrial plate E Th II dorsal macrochaetotaxy F Abd II dorsal macrochaetotaxy G Abd III dorsal macrochaetotaxy H Abd IV dorsal macrochaetotaxy. Abbreviations: Abd = abdominal tergite; Th = thoracic tergite. Scale bars: 0.03 mm (A, B, D); 0.02 mm (C); 0.05 mm (E–H).

Entomobrya cf. quinquelineata. Habitus A dorsolateral view B ventral view (same specimen). Scale bar: 0.5 mm.

Entomobrya cf. quinquelineata A head chaetotaxy B labral papillae C trochanteral organ D unguis and unguiculus of leg III E Th II dorsal macrochaetotaxy F Abd II dorsal macrochaetotaxy G Abd III dorsal macrochaetotaxy H Abd IV dorsal macrochaetotaxy. Abbreviations: Abd = abdominal tergite; Th = thoracic tergite. Scale bars: 0.03 mm (A–C); 0.02 mm (D); 0.05 mm (E–H).

Entomobrya unostrigata. Habitus A typical colour pattern (dorsal view) B intermediate semi-dark colour form (dorsolateral view) C intermediate semi-dark colour form (ventrolateral view – same specimen as Fig. 13B) D dark colour form (ventrolateral view). Scale bars: 0.5 mm.

Entomobrya unostrigata A head chaetotaxy B labral papillae C claw III (unguiculus with two different morphologies: outer edge smooth or serrate) D mucro E Th II dorsal macrochaetotaxy F Abd II dorsal macrochaetotaxy G Abd III dorsal macrochaetotaxy H Abd IV dorsal macrochaetotaxy. Abbreviations: Abd = abdominal tergite; Th = thoracic tergite. Scale bars: 0.03 mm (A, C); 0.02 mm (B, D); 0.05 mm (E–H).