Archidispus ukrainicus Khaustov

Khaustov, Alexander A., 2004, Two new species of mite genus Archidispus (Acari: Heterostigmata, Scutacaridae) from Ukraine, Zootaxa 455, pp. 1-8 : 5-8

Archidispus ukrainicus Khaustov spec. nov. ( Figures. 7–12 )

Phoretic female. Length of idiosoma 191(175–193), maximum width 151(145–152).

Gnathosoma (figs. 7–8). Dorsally with 3 pairs of setae, of these, ch1>ch2, pp tiny and hardly visible, insert anterolaterally of setae ch2. Ventral surface with 1 pair of setae. Each palp with 2 dorsal setae; ventrally with mushroom­like process and solenidion.

Idiosomal dorsum (fig. 7). Free margin of tergite C with weak stripes. Cupules ih large, oval, ia not evident. Tergite H with posteromedian tongue­like elongation. Setae c2 inserted on the free margin of tergite C and bearing a highly sclerotic alveolar canal. All dorsal setae sharply pointed and distinctly barbed, except smooth f. Length of dorsal setae: c1 39(36–39), c2 40(36–40), d 42(40–42), e 47(43–47), f 33 (29–33), h1 60(55–60), h2 49(47–49). Distances between dorsal setae: c1–c1 44(44–45), c1–c2 33(31–36), d–d 92(90–98), e–f 41(34–41), f–f 53(53–59), h1–h1 29(28–31), h1–h2 37(34–38). Trichobothrium with thin stem, distally round, with fine barbs, setae v1 longer and thicker than v2.

Idiosomal venter (fig. 8). Setae 1a beak­like. Setae 2a, 3b, 4a, 4b with thickened base and smooth. Setae 2b, 3a, ps2 thin and smooth. Setae 1b, 3c, 4c, ps1, ps3 barbed. Apodemata IV highly sclerotized, extend to insertion of setae 3b. Apodemata V completely reduced. Length of ventral setae: 1a 21(20–21), 1b 29(29–32), 2a 29(27–29), 2b 31(28– 33), 3a 29(28–29), 3b 29(27–29), 3c 34(34–37), 4a 22(20–22), 4b 34(34–37), 4c 47(45– 47), ps1 34(28–34), ps2 12(10–13), ps3 27(26–27).

Legs (figs. 9–12). Leg chaetotaxy as in A. kurosai sp.n. Leg I (fig. 9): Tibiotarsus thickened, with a massive claw. Solenidia 2 17(16–17)> 2 12(12–14)> 1 11(11–12)> 1 10(10–11); 2 and 2 uniformly thin, 1 and 1 thickened distally. Setae dFe broadened, leafΠlike. Leg II (fig. 10): tarsus with slightly asymmetrical claws. Solenidion

10(10–11) broadened in middle portion, solenidion 10(10) uniformly thin. Leg III (fig. 11): claws as on tarsus II. Solenidion 11(10–11) of same shape as on leg II. Leg IV (fig. 12): tarsus with pretarsus and two small claws, empodium extended, distally widened. Solenidion 15(14–15) uniformly thin.

Male, nonphoretic female and larva. Unknown.

Diagnosis. By the presence of beak­like setae 1a, widened at the base setae 2a, 3b, 4a, 4b the new species is similar to three species: A. triangularis ( Kurosa, 1974) , A. foliatus Kurosa, 1978 , A. sugiyamai Kurosa, 1991 , described from Japan. Among them the new species is most similar to A. triangularis , but differs from the latter by the non­triangular shape of tergite C, by thinner dorsal setae, and by longer and not curved setae 3b.

Type material. Holotype (female): slide No. 155, Crimea, Simferopol reg., the bank of Simferopol’s reservoir pond, on Stenolophus persicus Mnnh. , 2.IV.1986 (leg. Eidelberg), paratypes: 40 females with same data as holotype.

Etymology. The species is named " ukrainicus ", referring to its geographical distribution.

Figures

FIGURES 7 – 8. Archidispus ukrainicus Khaustov spec. nov. (phoretic female): 7 – 8 dorsal and ventral view of body, respectively.

FIGURES 9 – 12. Archidispus ukrainicus Khaustov spec. nov. (phoretic female): 9 – 12 — legs I – IV, respectively.