Tanytydeus simplex (Delfinado and Baker, 1974) Khaustov, 2017

Khaustov, Alexander A., 2017, Review of the Paratydeidae (Acari: Prostigmata), with description of three new species, Zootaxa 4303 (2), pp. 151-212 : 186-191

Tanytydeus simplex (Delfinado and Baker, 1974) comb. nov.

( Figs. 33–36 )

Scolotydaeus simplex Delfinado and Baker, 1974 , p. 207, figs. 17–22.

Description. FEMALE ( Figs. 33–36 ). Length of idiosoma 475, width 165. Gnathosoma . Palptarsus with three eupathidia (ul’ eupathidion-like). Subcapitular setae n distinctly longer than subequal m and or 1-2. Idiosomal dorsum ( Fig. 33 A). Dorsal idiosomal setae smooth. Dorsal idiosomal setae c 1, d, e, f 1, h 1, ps 1, ad 1 blunt-ended; other dorsal setae pointed. Hysterosoma with transverse furrows between setal rows d-e, e-f and h-ps, respectively. Cupules im situated anterolaterally to setae e, cupules ip situated laterally to setae f 1 and anteromedially to setae f 2. Idiosomal venter ( Fig. 33 B). Setae 3 c, ps 2 and ad 2 blunt-ended, smooth; other ventral setae pointed. Genital area with four pairs of simple aggenital setae and 5–6 pairs of genital setae ( Fig. 34 ). Genital opening with three pairs of genital acetabulae. Third pair of genital acetabulae smaller than first and second pairs. Cupules ia situated anterolaterally to setae 3 a near lateral margin of the body; cupules ih situated laterally to setae ag 4 near lateral margin of body. Lengths of idiosomal setae: ve 12, sci 48, sce 23, c 1 13, c 2 49, d 14, e 14, f 1 15, f 2 40, h 1 23, h 2 45, ps 1 26, ps 2 24, ps 3 38, ad 1 22, ad 2 19, ad 3 20, 1 a 29, 1 b 18, 1 c 11, 1 d 11, 2 a 27, 2 b 17, 2 c 10, 3 a 39, 3 b 23, 3 c 15, 4 a 18, 4 b 14, ag 1-4 17–20, g 1 16, g 2 11, g 3-4, g 6 13, g 5 17. Legs ( Figs. 35 , 36 ). Lengths of legs: leg I 145, leg II 97, leg III 100, leg IV 125. Leg I ( Fig. 35 A) Leg setation: Tr 0, Fe 3/5 (d, l’, l”, v’, v”, d 1, l’ 1, bv”), Ge 6(1) (d, l’, l”, v’, v”, l’ 1, σ), Ti 8(1) (d, l’ξ, l”, 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). Sensory pits of tarsus oval; ω 1 situated in the space between setae tc”, and (ft); ω 2 situated posteriorly to seta ft’. Leg II ( Fig. 35 B). Leg setation: Tr 1 (v’), Fe 2 (d, bv”), Ge 2(1) (l’, l”, 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 very small, about four times shorter than tarsal claws.

Leg III ( Fig. 36 A). Leg setation: Tr 1 (v’), Fe 3 (d, v’, ev’), Ge 2 (l’, v’), Ti 3(1) (d, v’, v”, φ), Ta 5 (tc ’, tc”, p”, u’, u”). Claws and empodium of same shape as on tarsus II. Seta (u) with one distinct barb; setae (tc) and p” bluntended. Leg IV ( Fig. 36 B). Leg setation: Tr 0, Fe 1/2 (d, v’, ev’), Ge 1 (v’), Ti 3 (d, v’, v”), Ta 5 (p’, p”, tc, u’, u”). Setae (u) with one distinct barb each; seta tc blunt-ended.

MALE not available for this study. Described by Delfinado and Baker (1974).

LARVA, PROTONYMPH, DEUTONYMPH and TRITONYMPH unknown.

Material examined. One female, USA, New York, Schuyler Co., Connecticut Hill, rotten stump, 12 September 1975, coll. and det. B.M. OConnor.

Remarks. The original description of Scolotydaeus simplex lacks illustrations of the female and Delfinado and Baker (1974) only stated that the female has a longer genital opening. Here, I show that this species is better placed in Tanytydeus because of the absence of eyes and leg and palpal solenidia forming sensory pits.

Figures

FIGURE 33. Tanytydeus simplex (Delfinado and Baker, 1974) comb. nov., female: A—body in dorsal view, B—body in ventral view.

FIGURE 34. Tanytydeus simplex (Delfinado and Baker, 1974) comb. nov., female: genital area.

FIGURE 35. Tanytydeus simplex (Delfinado and Baker, 1974) comb. nov., female: A—leg I in dorsal view, B—leg II in dorsal view.

FIGURE 36. Tanytydeus simplex (Delfinado and Baker, 1974) comb. nov., female: A—leg III in dorsal view, B—leg IV in dorsal view.