Steatonyssus Kolenati 1858
Creators: name: Orlova, Maria V.
name: Anisimov, Nikolay V.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Mesostigmata
Macronyssidae
Steatonyssus

description: Key to species of the genus Steatonyssus of Russia and adjacent countries (males)   
1. Ventral sclerotization undivided................................................................................................... 3  
– Ventral sclerotization divided....................................................................................................... 2  
 2. Setae St4 situated on unsclerotized cuticle, idiosoma with 10-15 dorsal and eight ventral pairs of setae........................................................................................... S. pseudoheteroventralis sp. nov.   
 – St4 situated on sternogenitoventral shield, idiosoma with 25 dorsal and 13 ventral pairs of setae............................................................................................................................... S. heteroventralis   
 3. Two dorsal plates.......................................................................................................... S. superans   
– Single dorsal plate......................................................................................................................... 4  
 4. Setae Z5 long................................................................................................................................. 5   
 – Setae Z5 short................................................................................................................................ 6   
 5. Dorsal plate with 23–24 pairs of setae; holoventral plate slightly widens posteriorly to coxae IV; anterior seta on coxae III resembles a fish tail.............................................................. S. spinosus   
 – Dorsal plate with 25 pairs of setae; holoventral plate narrow, without widening posteriorly to coxae IV; anterior seta on coxae III usual................................................................................ S. noctulus   
6. Peritremes reaching middle of coxae III....................................................................................... 7  
– Peritremes reaching anterior margins of coxae III or posterior margins of coxae II.................... 8  
 7. Dorsal plate with 18 pairs of setae; anterior seta on coxa III usual............................. S. desertorus   
– Dorsal plate with 19 pairs of setae; anterior seta on coxae III variable........................................ 6  
 8. Anterior seta on coxa is III spur-like, with ridge-like thickening.................. S. occidentalis evansi   
– Anterior seta on coxa III usual...................................................................................................... 9  
 9. Dorsal plate clearly divided into podosomal and opisthosomal parts, these parts closely connected by a transverse furrow................................................................................................ S. mongolicus   
– Dorsal plate undivided................................................................................................................ 10  
 10. Dorsal plate with 16 pairs of setae; anterior seta on coxae III usual …………………..…. S. cavus   
 – Dorsal plate with 19–20 pairs of setae; anterior seta on coxae III looks like a fish tail.............................................................................................................................................. S. periblepharus
description: Published as part of Orlova, Maria V. & Anisimov, Nikolay V., 2023, Three new species of bat-parasitic gamasid mites of the genera Spinturnix, Macronyssus and Steatonyssus (Acari: Mesostigmata: Spinturnicidae, Macronyssidae) from Siberia and Mongolia, with keys to species of Russia and adjacent countries, pp. 211-239 in Persian Journal of Acarology 12 (2) on pages 231-232, DOI: 10.22073/pja.v12i2.76740, http://zenodo.org/record/8113590