Euseius ucrainicus (Kolodochka, 1979)

Kolodochka, L. A., 2023, The Predatory Mites (Phytoseiidae, Parasitiformes) In The Fauna Of Ukraine: Genera Paragigagnatus, Carinoseius, Kampimodromus, Eharius, Typhlodromips, And Euseius, Zoodiversity 57 (6), pp. 477-506 : 503-504

Euseius ucrainicus (Kolodochka, 1979) ( fig. 10 )

Amblyseius (Euseius) ucrainicus Kolodochka, 1979 b: 33 .

Euseius ucrainicus : Chant & McMurtry, 2005 a: 187; Chant & McMurtry, 2007: 123; Hajizadeh et al., 2002: 374.

Material. Type. Holotype}, allotype {: #2273, Ukraine, Lviv Region, Busskiy District, surroundings of the vil. Olesko , Quercus sp. , 24.08 1976 (Kolodochka) ( SIZK).

Non-type. 214 specimens (180}, 34 {) — Transcarpathian, Lviv, Sumy, and Chernihiv Regions .

R e d e s c r i p t i o n. F e m a l e. Dorsal shield ( fig. 10 , 1 ) weakly sclerotised, smooth, oval, with small lateral emarginations; bears 6 pairs of round, distinct solenostomes (it, iv, isc, il, is, ic; pair id missing). Setae PM 4 longer than others, thickened and slightly serrated; the rest are short and smooth. Peritremes short, barely projecting beyond the level of seta AS ( fig. 10 , 1 ). Ventrianal shield with shallow lateral emarginations, preanal setae elongated; anal pores rounded, distinct, not contiguous ( fig. 10 , 2 ). There is one pair of metapodal scutes (the scutes of the anterior pair are reduced) ( fig. 10 , 3 ). The posterior end of the peritremal shield has a round pore and consists of three narrow, undivided parts of varying degrees of sclerotization ( fig. 10 , 4 ). There are 5 teeth on Df and 1 on Dm ( fig. 10 , 5 ). Spermatheca ( fig. 10 , 6 ) with a smoothly curved tubular funnel, sharply expanding towards the sac in the last third. On the border of the beginning of the expansion there is a well-marked annular sclerotised collar directed towards the sac; sitting atrium. Leg IV with 3 macrochaetes, longest on basitarsus ( fig. 10 , 7 ).

M e a s u r e m e n t s. Lds 350; Wds 205, Lvas106, Wvas max 76, Lian 30, LtarIV 131; setae length: AD 1 31, AD 2 19; AD 3 19; AD 4 19; PD 1 20, PD 4 6, AM 1 33; AM 2 18; AL 1 27; AL 3 29; AL 4 36; PL 1 24; PL 2 24; PL 3 24; PM 1 19; PM 3 23; PM 4 52; AS 19; PS 19; PV 38; MCh IV: gen 33, tib 35, tar 62.

Male. Preanal setae 3 pairs; anal pores large, rounded, well visible ( fig. 10 , 8 ). Spermatodactyl curved, sharply thinning distally after bending, with small process directed downwards ( fig. 10 , 9 ). Lds 270.

Diagnosis. Euseius ucrainicus can be easily differentiated from E. finlandicus , in the structure of the spermatheca with a long tubular funnel and a developed collar on it, almost twice as long preanal setae, and less teeth on Df.

D i s t r i b u t i o n, h a b i t a t, o c c u r r e n c e. Europe ( Ukraine). In Ukraine: Transcarpathia, Polissia; trees and shrubs; frequent.

Note. Description, illustrations and morphometry are based on type specimens.

Key to genera and species of Ukrainian fauna

1. Dorsal shield of adult female strongly sclerotised, tuberculate in middle part, its margins bent ventrally in posterior half ( fig. 1, 1 ). Peritremes long, almost reaching to setae AD1. All dorsal setae short, approximately equal in length. Ventrianal shield without anal pores ........ Paragigagnathus Amitai and Grinberg One species in Ukraine — Paragigagnathus insuetus (Livschitz & Kuznetzov)

— Different combination of characters ................................................................................................................ 2

2. Dorsal pores crater-like, very large ( fig. 2 , 1 ). Ventrianal shield with 1 pair of preanal setae, anal pores absent .............................................................................................................................. Carinoseius Wainstein One species in Ukraine, C. improvisus Kolodochka, Bondarev & Gwiazdowicz

— Dorsal pores of normal size for most species of the family. Ventrianal shield with 3 pairs of preanal setae, anal pores present ............................................................................................................................................... 3

3. Dorsal shield without PL2 setae ........................................................................................................................ 4

— Pair PL2 on the dorsal shield ............................................................................................................................ 8

4. Setae on dorsal shield are in marginal rows (AD1, AM1, AL1, AL3, AL4, PL1, PM3, PM4, as well as AS and PS) and serrated. Sternal shield square Kampimodromus Nesbitt ..........................................................5

— All setae of dorsal shield thin, flexible, smooth except for PM4, which have 1–2 notches. Sternal shield longitudinally elongated Eharius Tuttle & Muma ...........................................................................................7

5. Dorsal shield bears 4 pairs of small solenostomes (it, iv, il, ic) ............................ K. aberrans (Oudemans)

— Dorsal shield bearing 5 pairs of conspicuous solenostomes (it, iv, il, is, ic) ............................................... 6

6. Length of dorsal seta PM3 approximately equal to distance from its theca to solenostome ic ................... ....................................................................................................................................... K. corylosus Kolodochka.

— Length of dorsal seta PM3 exceeds distance from its theca to solenostome ic and almost reaches the theca of seta PM4 .............................................................................................. K. karadaghensis Kolodochka

7. Gnatosoma with gnathobrachium, elongated gnathobase and chelicerae. Opistoventral setae MV1 and MV2 absent. Peritremes short, not reaching level of seta AS.......................................... Eharius (Eharius) One species in Ukraine, E. (E.) kostini (Kolodochka)

— Gnathobase with normal proportions for the family. Opistoventral setae MV1 absent, seta MV2 present. Perithremes extend beyond bases of setae AS. ........................................................................................... ................................................................................................................................................... Eharius (Zavicus) One species in Ukraine, E. (Z.) kuznetzovi (Kolodochka, 1979)

8. Setae of the ventrianal shield have a triangular pattern. The posterior margin of sternal shield is almost even, without a lobe. Peritremes long, reach level of setae AD1 .......................... Typhlodromips De Leon One species in Ukraine, T. mistassini (Chant & Hansell)

— Setae of ventrianal shield placed in transvers row ( fig. 9 , 1 ). The posterior edge of sterna shield is provid- ed with a median lobe. Peritremes shortened, projecting beyond the thecae of setae Euseius Wainstein. .................................................................................................................................................................................9

9. Preanal setae short, do not extend beyond anal pores ...................................... E. finlandicus (Oudemans)

— Preanal setae long, extending half their length beyond the level of the anal pores ...................................... ................................................................................................................................... E. ucrainicus (Коlоdосhkа)

Acknowledgements

This study was funded as a part of the I. I. Schmalhauzen Institute of Zoology project 0116U003015, No II-51-21 by the National Academy of Sciences of Ukraine. The author is deeply indebted to V. Korneyev for his advices during the preparation of the manuscript for publication, which helped to improve its quality.

Figures

Fig. 10. Euseius ucrainicus (Ко1оdосhkа, 1979)} (1–8), {(9, 10): 1 — dorsal shield; 2 — ventral body surface; 3 — metapodal plate; 4 — posterior part of peritremal shield; 5 —chelicera; 6 — spermatheca; 7 — fragment of leg IV; 8 — ventrianal shield; 9 — chelicerae with spermatodactil.

Fig. 1. Paragigagnathus insuetus (Livschitz & Kuznetzov, 1972)} (1–7), {(8, 9): 1 — dorsal shield; 2 — ventral body surface; 3 — metapodal plates; 4 — posterior part of peritremal shield; 5 — chelicera; 6 — spermatheca; 7 — fragment of leg IV; 8 — ventrianal shield; 9 — chelicerae with spermatodactil; 10 — seta PM4; 11 — seta PD4; 12 — гнатосома (seta no shown), Gb — gnathobrachium.

Fig. 2. Carinoseius improvisus (Kolodochka, Bondarev, & Gwiazdowicz, 2015), comb. n.} (1–11): 1 — dorsal shield; 2 — ventral body surface; 3 — metapodal plates; 4 — posterior part of peritremal schield; 5 — chelicera; 6 — spermatheca; 7 — seta AS and peritreme; 8 — solenostome iv; 9 — solenostome il; 10 — solenostome is; 11 — solenostome ic.

Fig. 3. Kampimodromus aberrans (Oudemans, 1930 a)} (1–7), {(8, 9): 1 — dorsal shield; 2 — ventral body surface; 3 — metapodal plates; 4 — posterior part of peritremal shield; 5 — chelicera; 6 — spermatheca; 7 — fragment of leg IV; 8 — ventrianal shield; 9 — chelicerae with spermatodactil.

Fig. 4. Kampimodromus corylosus Kolodochka 2003} (1–7), {(8, 9): 1 — dorsal shield; 2 — ventral body surface; 3 — metapodal plates; 4 — posterior part of peritremal shield; 5 — chelicera; 6 — spermatheca; 7 — fragment of leg IV; 8 — ventrianal shield; 9 — chelicerae with spermatodactil.

Fig. 5. Kampimodromus karadaghensis Kolodochka 2005} (1–7, 11), {(8, 9): 1 — dorsal shield; 2 — ventral body surface; 3 — metapodal plates; 4 — posterior part of peritremal shield; 5 — chelicera; 6 — spermatheca; 7 — fragment of leg IV; 8 — ventrianal shield; 9 — chelicerae with spermatodactil; 10 — macroseta on tarsus of leg IV.

Fig. 6. Eharius (Eharius) kostini (Коlоdосhka)} (1–7, 11), {(8, 9): 1 — dorsal shield; 2 — ventral body surface; 3 — metapodal plates; 4 — seta AS, peritreme with peritremal shield; 5 — chelicera; 6 — spermatheca; 7 — fragment of leg IV; 8 — ventrianal shield; 9 — chelicerae with spermatodactil; 10 — solenostome iv; 11–13 — samples of aberrations in the placement of preanal setae.

Fig. 7.Eharius (Zavicus) kuznetzovi (Коlоdосhka)} (1–7), {(8, 9): 1 — dorsal shield; 2 — ventral body surface; 3 — metapodal plates; 4 — seta AS, peritreme with peritremal shield;5 — chelicera;6 — spermatheca;7 — fragment of leg IV; 8 — ventrianal shield; 9 — chelicerae with spermatodactil; 10 — seta PM4; 11 — samples of aberrations in the placement of preanal setae.

Fig. 8. Typhlodromips mistassini (Chant & Hansell)} (1–8), {(8, 9): 1 — dorsal shield; 2 — ventral body surface; 3 — metapodal plates;4 — caudal part of peritremal shield;5 — chelicera; 6 — spermatheca;7 — fragment of leg IV; 8 — ventrianal shield; 9 — Dm of chelicerae with spermatodactil.

Fig. 9. Euseius finlandicus (Oudemans, 1915)} (1–8), {(9, 10): 1 — dorsal shield; 2 — ventral body surface; 3 — metapodal plate; 4 — posterior part of peritremal shield; 5 — chelicera; 6 — spermatheca; 7 — fragment of leg IV (only macrosetae shown); 8 — ventrianal shield; 9 — chelicerae with spermatodactil.