Neotydeus ardisanneae Baker, 1950

Khaustov, Alexander A., 2017, Review of the Paratydeidae (Acari: Prostigmata), with description of three new species, Zootaxa 4303 (2), pp. 151-212 : 181-186

Neotydeus ardisanneae Baker, 1950

( Figs. 29–32 )

Redescription. FEMALE ( Figs. 29–32 ). Length of idiosoma 340, width 130. Gnathosoma ( Fig. 30 A, B). Palptarsus with three eupathidia (ul’ eupathidion-like). Subcapitular setae n subequal to m and distinctly longer than subequal or 1-2. Idiosomal dorsum ( Fig. 29 A). Hysterosoma with transverse furrows between setal rows d-e, e-f and h-ps, respectively. Setae ve and sci pointed and smooth, other dorsal idiosomal setae blunt-ended and weakly barbed. Cupules im situated laterally to setae e, cupules ip situated posterolaterally to setae f 1 and anteromedially to setae f 2. Idiosomal venter ( Fig. 29 B). Setae ps 2 and ad 2 blunt-ended, weakly barbed; other ventral setae pointed. Genital area with 4–5 pairs of simple aggenital setae and 3–4 pairs of genital setae ( Fig. 30 C). Cupules ia situated anterolaterally to setae 3 a near lateral margin of body; cupules ih situated anterolaterally to setae ps 3. Lengths of idiosomal setae: ve 13, sci 47, sce 9, c 1 8, c 2 12, d 9, e 9, f 1 11, f 2 11, h 1 12, h 2 12, ps 1 12, ps 2 12, ps 3 19, ad 1 12, ad 2 10, ad 3 16, 1 a 24, 1 b 17, 1 c 13, 1 d 13, 2 a 22, 2 b 23, 2 c 8, 3 a 21, 3 b 20, 3 c 13, 4 a 17, 4 b 11, ag 1 10, ag 2 13, ag 3 12, ag 4 14, g 1 9, g 2 9, g 3 10, g 4 9. Legs ( Figs. 31 , 32 ). Lengths of legs: leg I 130, leg II 87, leg III 93, leg IV 105. Leg I ( Fig. 31 A). Leg setation: Tr 0, Fe 4/5 (d, l’, l”, v’, v”, d 1, l’ 1, l” 1, bv”), Ge 7(1) (d, l’, l”, v’, v”, l’ 1, l” 1, σ), Ti 8(1) (d, l’ξ, l”ξ, v’, v”, k, l’ 1, l” 1, φ), Ta 14(2) (p’ξ, p”ξ, tc’ξ, tc”ξ, ft’ξ, ft”ξ, a’, a”, u’, u”, s, pl”, pv’, pv”, ω 1, ω 2). Leg II ( Fig. 31 B). Leg setation: Tr 1 (v’), Fe 3 (d, l’, bv”), Ge 4(1) (d, l’, l”, v’, σ), Ti 4(1) (d, l’, v’, v”, φ), Ta 7(1) (p’ξ, p”, tc ’, tc”, u’, u”, ε, ω). Setae (tc) blunt-ended. Empodium about three times shorter than tarsal claws. Leg III ( Fig. 32 A). Leg setation: Tr 1 (v’), Fe 3 (d, v’, ev’), Ge 2 (l’, v’), Ti 3(1) (d, v’, v”, φ), Ta 6 (tc ’, tc”, p’, p”, u’, u”). Claws and empodium of same shape as on tarsus II. All leg setae pointed. Leg IV ( Fig. 32 B). Leg setation: Tr 0, Fe 1/2 (d, v’, ev’), Ge 3 (d, l’, v’), Ti 3 (d, v’, v”), Ta 5 (p’, p”, tc, u’, u”). Seta tc blunt-ended.

Material examined. Six female paratypes, USA, leaf trash, Sanburn, Johnson County, 111, 20 September 1949, Coll. P.W. Smith and L.J. Stannard.

Remarks. Most of the studied paratypes are in bad condition and this redescription is based on a less damaged specimen.

Delfinado and Baker (1974) synonymized the genus Neotydeus to Scolotydaeus but it was later revived by Seeman and Walter (1999), pending more comprehensive study. In my opinion Neotydeus considerably differs from Scolotydaeus by the absence of eyes, presence of only two pairs of genital acetabulae and non-bifurcate unguinal setae on tarsi II–IV.

Figures

FIGURE 29. Neotydeus ardisanneae Baker, 1950, female: A—body in dorsal view, B—body in ventral view.

FIGURE 30. Neotydeus ardisanneae Baker, 1950, female: A—gnathosoma in dorsal view, B—subcapitulum, C—genital area.

FIGURE 31. Neotydeus ardisanneae Baker, 1950, female: A—leg I in dorsal view, B—leg II in dorsal view.

FIGURE 32. Neotydeus ardisanneae Baker, 1950, female: A—leg III in dorsal view, B—leg IV in dorsal view.