Tydeus caryae, Khanjani, M. & Ueckermann, E. A., 2003

Khanjani, M. & Ueckermann, E. A., 2003, Four new tydeid species from Iran (Acari: Prostigmata), Zootaxa 182, pp. 1-11 : 4-6

Tydeus caryae n. sp. ( Figs. 10­17 )

DIAGNOSIS: Dorsal setae long and serrated with trichobothrium sci smooth and subequal in length to vi, ve, c 1 and d but clearly shorter than rest of dorsal setae, striae U­shaped between setae d, ft’ on tarsus I much shorter than ft" and empodial claws absent.

FEMALE (5 specimens)

Length of idiosoma including gnathosoma 356 (315­372) and width 227 (217­236).

Dorsum ( Fig. 10 ) ­ Striae U­shaped between d. Dorsal setae long and serrated becoming progressively longer towards posterior. Trichobothrium, sci, smooth and subequal in length to prodorsal setae vi and ve and opisthosomal setae c 1 and d but clearly shorter than rest. Length of setae: vi 35 (38­44), ve 38 (38­41), sci 38 (38­41), sce 44 (44­50), c 1 38 (35­ 41), c 2 50 (50­54), d 41 (38­41), e 50 (50­54), f 1 50 (50­57), f 2 50 (54­57), h 1 50 (44­50), h 2 50 (41­50). Slit­like lyrifissures ia between setae c 1 and d and im between d and e.

Venter ( Fig. 11 ) ­ Striae longitudinal between ventral setae. Epimeral formula and anogenital setae similar to those of T. kabutarahangiensis .

Gnathosoma ( Figs. 12­13 ) ­ Partly covered by prodorsum. Setal formula of palp (tarsus­genu), 6(1)­2­2, tarsus with p ' short, stout and blunt distally, ba very short ( Fig. 13 ). Movable cheliceral digit (19) subequal in length to palptarsus (22) ( Fig. 12 ). Length of palp 60 (63).

Legs ( Figs. 14­17 ) ­ Length of legs I­IV: I 239 (233­252), II 211 (211­233), III 230 (224­236), IV 243 (239­265).

Empodial claws absent. Solenidion I shorter than width of segment, II very short, difficult to find. Tarsus I with tc and ft setae similar to those of T. kabutarahangensis . Setae ft' much shorter than ft ". Seta k on tibia I very short and forked ( Fig.14 ). Most leg setae serrated.

Leg setal formulae as follows: tarsi 8 (1)­6(1)­5­5; tibiae 3+ k ­2­2­2; genua 3­2­1­1; femora 3­2­1­1; trochanters 1­0­1­0; coxae 2­1­3­1.

TRITONYMPH (4 specimens)

Dimensions: Length (including gnathosoma) 321­324, width 198­202, leg I 139­161, leg II 126­139, Leg III 135­151, Leg IV 145­161, palp 44, vi 19­22, ve 22­25, sci 32, sce 25­28, c 1 19, c 2 28­32, d 20­22, e 25, f 1 25­28, f 2 25­32, h 1 22­28, h 2 22­25.

Tritonymph differs from female in that anogenital area has four pairs of genital and four pairs of aggenital setae and two pairs of anal setae, genital slit replaced by two pores. Leg chaetotaxy similar to that of female. Setae h 1­2 and ps 1 may be slightly spatulate distally.

REMARKS: This species is similar to T. longisetosus (El­Bagoury and Momen, 1988) (junior homonym of T. longisetosus Kuznetzov and Zapletina, 1972 ). It only differs from the Egyptian species in that the trichobothrium, sci, is subequal to some but shorter than most dorsal body setae, opposed to longer than all dorsal setae in T. longisetosus . It further differs in that opisthosomal striae are longitudinal between d instead of transverse as in T. longisetosus . Orthotydeus longisetosus El­Bagoury & Momen is a junior homonym of Tydeus longisetosus Livshitz et al. (1972) . Therefore we wish to suggest the following name for the species of El­Bagoury & Momen (1988), viz. T. momeni nom. nov.

ETYMOLOGY. The species name is derived from the Greek name for Walnut "Karyon".

TYPE MATERIAL: Holotype female and one paratype female from Juglans regia L., College of Agriculture, Hamadan, 23 Aug. 2001, M. Khanjani; three paratype females and four paratype tritonymphs from Juglans regia, Tuiserkan , 23­28 Nov.1998, T. Husseini.

Figures

FIGURES 10 ­ 17. Tydeus caryae n. sp. (Female). 10. Dorsal view; 11. Anogenital area; 12. Cheliceral stylet; 13. Palp; 14. Leg I; 15. Leg II; 16. Leg III; 17. Leg IV.