Amblyseius krantzi
Creators: name: Kolodochka, L. O.
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Mesostigmata
Phytoseiidae
Amblyseius
Amblyseius krantzi

description: Amblyseius krantzi (Chant, 1959) (fig. 5)
Typhlodromus (Amblyseius) berlesei Chant, 1957:292.
Typhlodromus (Amblyseius) krantzi Chant, 1959: 83, a replacement name for Typhlodromus berlesei Chant, 1957. Amblyseius (Amblyseius) krantzi: Muma, 1961: 287.
Amblyseius krantzi: Chant & Hansell, 1971: 708; Beglyarov, 1981: 31.
Material. Type. Holotype}, Canada, British Columbia, Nakusp, on Ranunculus sp., (collection date unknown), specimen #292 (not located).
Non-type. 38 specimens (29}, 9 {) — Lviv, Transcarpathian, Zhytomyr Regions.
R e d e s c r i p t i o n. F e m a l e. Dorsal shield (fig. 5, 1) weakly or moderately sclerotised, oval, without lateral notches, smooth; small solenostomes 6 pairs (it, id, isc, il, is, ic; pair iv missing). Dorsal setae contrast in length. Setae AL4, PM3, PM4 much longer than the others, AD1 and AM1 have medium length, the rest are very short. Dorsal setae sharp, smooth, thin, with the exception of serrated and thickened PM3 and PM4. Seta AM1 longer then distance from its theca to theca of seta AL1. Peritremes extend beyond the level of the bases of setae AD1. Ventrianal shield (fig. 5, 2) narrower than the genital shield, elongated with a convex anterior edge and lateral notches, smooth; anal pores large, crescent-shaped, spaced close to the thecae of PrA2 setae. Seta MV1 missing on the membrane surrounding the ventrianal shield. Metapodal scute elongated, anterior one smaller and narrower than posterior one (fig. 5, 3). The posterior part of the peritremal shield slightly curved, beak-shaped (fig. 5, 4). Eigth teeth on Df, on Dm — 3 (fig. 5, 5). The funnel of the spermatheca cup-shaped, atrium large, on a short neck (fig. 5, 6). Leg IV has 3 pointed macrochaetes: longer on the basitarsus and genu, shorter on the tibia (fig. 5, 7). Genu and tibia III, genu II and I each have a short macrochaete.
Measurements: Lds 405; Wds 260; Lvas 117; Wvas 81; Lian 372; Ltar 130; setae length: AD1 27; AD2 5; AD3 6; AD4 6; PD2 8; PD4 8; AM1 41; AM2 6; AL1 8; AL2 9; AL4 70; PL1 10; PL2 9; PL3 6; PM1 8; PM3 83; PM4 104; AS 19; PS 8; PV 39; MCh IV: ge 69, ti 51, ta 72; MCh III: ge 37, ti 30; MCh II: ge 36; MCh I: ge 37.
Male. Preanal setae 3 pairs; anal pores large, oval (fig. 5, 8). Spermatodactylus Lshaped (fig. 5, 9). Lds – 310.
D i f f e r e n t i a l d i a g n o s i s. The absence of paired ventral setae MV1 near the ventrianal shield in A. krantzi is a unique character among species of the Amblyseius genus known in Ukraine. This character clearly separates the A. krantzi species from other near species, for example, A. rademacheri, A. andersoni and A. wainsteini. In addition to this rare feature, A. krantzi has 6, rather than 7, pairs of dorsal solenostomes and relatively larger anal pores.
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 (Poland, Ukraine), Kazakhstan, North America, on trees, bushes, grasses. In Ukraine: Polissia, on trees; common.
Note. Description, morphometry and illustrations are based on non-type specimens from the Lviv Region after comparing them with figures in publications of various authors.
description: Published as part of Kolodochka, L. O., 2024, Predatory Mites (Parasitiformes, Phytoseiidae) Of The Fauna Of Ukraine: Review Of The Genus Amblyseius With A Key To Species, pp. 461-496 in Zoodiversity 58 (6) on pages 471-473, DOI: 10.15407/zoo2024.06.461, http://zenodo.org/record/14704320