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 (females)   
 1. Setae Z5 on opisthosomal plate long.............................................................................................. 2   
 – Setae Z5 short................................................................................................................................ 3   
 2. Setae Z5 1.5 – 2.0 times shorter than J1–3........................................... S. spinosus Willmann, 1936   
 – Setae Z5 and J1–3 equal............................................................................. S. noctulus Rybin, 1992   
3. Peritremes long, reaching posterior margin or middle of coxa II................................................. 4  
– Peritremes short, not reaching posterior margin of coxa II........................................................... 5  
 4. Setae St1–3 subequal; posterior end of opisthonotal plate with three pairs of short, subequal setae S4, S5, Z5; J5 microsetae.............................................................................................................. 6   
 – Setae St 1 2 times shorter than St 3; posterior end of opisthonotal plate with setae S5 approximately 3 times longer than S4 and Z5; J5 short.......................................... S. mongolicus Dusbabek, 1966   
 5. Peritremes reaching middle of coxae III; sternal plate with a well sclerotized posterior margin.................................................................................................... S. occidentalis evansi (Ewing, 1933)   
 – Peritremes nearly reaching anterior margin of coxa III; sternal plate with a weakly sclerotized band................................................................................................................. S. desertorus Rybin, 1992   
 6. Setae St1 very short, nearly three times shorter than St3............... S. periblepharus Kolenati, 1858   
 – Setae St1 slightly shorter then St3.................................................................................................. 7   
 7. Posterior end of body with 10 – 12 pairs of thick, knife-shaped setae.......................................................................................................................................................... S. superans Zemskaya, 1951   
– Thick, knife-shaped setae absent.................................................................................................... 8  
 8. Peritremes reaching middle of coxae II; anterodorsal spur on coxa II with five denticles (sometimes difficult to observe); setae S 4–5 and Z5 subequal.......................... S. aglaiae Stanjukovich, 1991   
– Peritremes reaching posterior margin of coxae II......................................................................... 9  
 9. Setae j3 short, 1/2 of length of j1.................................................................. S. cavus Rybin, 1992   
 – Setae j3 longer............................................................................................................................. 10   
 10. Dorsal unsclerotized cuticle with more than 50 pairs of setae.............................................................................................................................................. S. heteroventralis Ah & Radovsky, 1967   
 – Dorsal unsclerotized cuticle with about 30 pairs of setae................................................................................................................................................................ S. pseudoheteroventralis sp. nov.
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 page 231, DOI: 10.22073/pja.v12i2.76740, http://zenodo.org/record/8113590