Cheylostigmaeus salinus Evans

Dönel, Güldem & Doğan, Salih, 2011, The stigmaeid mites (Acari: Stigmaeidae) of Kelkit Valley (Turkey), Zootaxa 2942, pp. 1-56 : 8-12

Cheylostigmaeus salinus Evans

Cheylostigmaeus salinus Evans, 1954: 803 .

Female ( Figure 5 ) Length of body 433 (410–460), width 259 (230–295).

Dorsum. Idiosoma oval. Prodorsal shield with four pairs of setae and a pair of eyes. Hysterosomal shield with six pairs of setae and suranal shield with two pairs of setae. Dorsal shields with punctations. Dorsal setae with minute spinules and a hyaline sheath distally. Dimensions of setae as follows: vi 90 (80–95); ve 132 (123–140); sci 80 (70–90); sce 110 (100–120); c 1 93 (87–100); c 2 90 (85–95); d 1 90 (85–95); d 2 91 (83–100); e 1 81 (75–90); e 2 93 (90–95); f 1 140 (133–155); h 1 85 (70–90); h 2 55 (50–60). Distances between setae: vi-vi 44 (37–55); ve-ve 102 (93– 110); vi-ve 55 (50–60); sci-sci 160 (153–168); ve-sci 55 (40–60); sce-sce 205 (195–215); sci-sce 35 (30–40); c 1 -c 1 90 (83–97); c 1 -d 1 55 (80–90); d 1 -d 1 105 (100–115); c 1 -d 2 43 (35–50); d 2 -d 2 210 (200–215); d 1 -d 2 72 (63–80); e 2 -e 2 175 (170–180); e 1 -e 1 109 (103–115); e 1 -e 2 53 (48–60); f 1 -f 1 87 (83–93); e 1 -f 1 60 (55–67); e 2 -f 1 100 (90–105); h 1 -h 1 45 (40–50); h 2 -h 2 100 (90–105); h 1 -h 2 35 (30–40).

Venter. Humeral shields bearing setae c 2, similar to other dorsal setae. Coxisternal shields divided, bearing three pairs of setae. Aggenital and anogenital shields each bearing three pairs of setae. Dimensions of setae as follows: ag 1= ag 2 30 (28–35); ag 3 25 (20–27); ps 1 35 (33–40); ps 2 30 (28–33) and ps 3 20 (18–25). ps 1 is thicker than others. All ventral shields reticulated and faintly punctated.

Legs. Leg I 330 (315–350), leg II 260 (243–285), leg III 260 (243–285), leg IV 240 (228–255). Chaetotaxy of leg segments as follows: coxae 2–2–2–2, trochanters 1–1–2–1, femora 6–5–3–2, genua 4(κ)–4(κ)–1–1, tibiae 7(ϕ,ϕρ)–6(ϕρ)–6(ϕρ)–6(ϕρ), tarsi 14(ω)–10(ω)–8(ω)–8(ω). Genua I and II with solenidion κ. All tarsi with solenidion ω.

Gnathosoma . Length of gnathosoma 125 (115–130). Chelicera 172 (163–180), palp 190 (180–195). Counts of setae from palp femur to palp tarsus: 3–2–2+1 claw+ 1 accessory claw–5+1ω+ 1 tridentate eupathidium. Subcapitulum with two pairs of adoral setae distally and two pairs of subcapitular setae proximally. Dimension of setae: m 53 (50–55); n 40 (38–43); distances between setae: m-m 37 (35–40); m-n 35 (33–37); n-n 40 (38–45).

Deutonymph Female ( Figure 6 ) Length of body 387 (375–398), width 211 (200–222).

Dorsum. Propodosomal shield with three pairs of setae (vi, ve and sci). Eyes located between setae ve and sci. Setae sce located on auxiliary shields. Hysterosoma with eight shields (excluding humerals). Central shield with two pairs of setae (c 1 and d 1). Seta e 1 placed on median zonal shields. Setae d 2 located on marginal shields and setae e 2 located on lateral zonal shields. Intercalary shield divided, with setae f 1. Suranal shield entire, with two pairs of setae (h 1 and h 2). Dorsal body setae as in female. Dimensions of setae as follows: vi 33 (30–35); ve 54 (53–56); sci 17 (18–20); sce 46 (43–48); c 1 47 (43–50); c 2 56 (55–58); d 1 47 (45–50); d 2 57 (55–60); e 1 56 (53–58); e 2 53 (50– 56); f 1 75 (73–76); h 1 52 (50–54); h 2 32 (30–33); Distances between setae: vi-vi 33 (30–35); ve-ve 90 (87–93); vi-ve 49 (47–50); sci-sci 146 (145–148); ve-sci 39 (37–40); c 1 -c 1 73 (70–76); c 1 -d 1 60 (57–63); d 1 -d 1 73 (70–76); e 1 -e 1 90 (87–93); h 1 -h 1 33 (30–35); h 2 -h 2 77 (73–81); h 1 -h 2 23 (20–25).

Venter. Humeral shields placed laterally. Setae c 2 similar to others. Coxisternal shields completely separated, bearing three pairs of setae. Aggenital and anogenital shields each bearing three pairs of setae.

Legs. Leg I 330 (315–350), leg II 260 (243–285), leg III 240 (228–255), leg IV 296 (276–330). Chaetotaxy of leg segments as follows: coxae 2–2–2–2, trochanters 1–1–2–0, femora 6–4–3–2, genua 4(κ)–3–0–0, tibiae 7(ϕ,ϕρ)–6(ϕρ)–6(ϕρ)–6(ϕρ), tarsi 14(ω)–10(ω)–8(ω)–8(ω).

Gnathosoma . Chelicera 141 (135–148) and palp 158 (150–165). Numbers of infracapitular setae and counts of setae on palp segments as in female.

Male (Figure 7) Length of body 325 (320–330), width 238 (200–260).

Dorsum. Dorsum covered by three smooth shields: prodorsal, opisthosomal and suranal. Dorsal setae with minute spinules and a hyaline sheath distally except for setae h 1, without hyaline sheath. Dimensions of setae as follows: vi 33 (30–35); ve 53 (50–55); sci 33 (30–35); sce 44 (43–45); c 1 33 (30–35); c 2 40 (38–40); d 1 35 (33–37); d 2 53 (50–55); e 1 49 (47–50); e 2 51 (50–53); f 1 91 (90–93); h 1 27 (25–30); h 2 55 (53–57). ve is longer than other prodorsal setae, sci is shorter than sce. Distances between setae: vi-vi 47 (45–53); ve-ve 87 (85–90); vi-ve 41 (40–43); sci-sci 135 (133–138); ve-sci 33 (30–35); sce-sce 151 (150–153); sci-sce 25 (23–28); c 1 -c 1 73 (70–75); c 1 -d 1 63 (60–65); d 1 -d 1 83 (80–87); d 2 -d 2 163 (160–167); d 1 -d 2 53 (50–55); e 2 -e 2 153 (150–155); d 1 -e 1 53 (50–55); e 1 -e 1 83 (80–85); f 1 -f 1 73 (70–75); e 1 -f 1 33 (30–35); e 2 -f 1 84 (83–85); h 1 -h 1 33 (30–35); h 2 -h 2 61 (60–63); h 1 -h 2 22 (20–25).

FIGURE 7. Cheylostigmaeus salinus male—A, dorsal view of idiosoma; B, leg I; C, leg II; D, leg III; E, leg IV; F, ventral view of idiosoma; G, seta h 1; H, seta ps 1; I, aedeagus; J, subcapitulum; K, palp.

Venter. Humeral shield triangular, situated laterally between coxae II–III, bearing setae c 2. Coxisternal shields divided, bearing three pairs of setae. Aggenital shield with three pairs of setae. Dimensions of aggenital setae as follows: ag 1 28 (25–30), ag 2 25 (20–27), ag 3 27 (25–30). Anogenital covers bearing three pairs of setae. Setae ps 3 is simple, ps 1 and ps 2 peg-like and set on tubercle. Aedeagus 85 (75–100), calyx cup-shaped, bulb not evident. Two pairs of accessory copulatory appendages, unciform appendages long and divergent posteriorly, forcipiform appendages short, flank aedeagus, ending blunt to slightly pointed.

Legs. Leg I 250 (245–255), leg II 185 (183–190), leg III 165 (160–170), leg IV 199 (195–205). Chaetotaxy of leg segments as follows: coxae 2–2–2–2, trochanters 1–1–2–1, femora 6–5–3–2, genua 4(κ)–4(κ)–1–1, tibiae 7(ϕ,ϕρ)–6(ϕρ)–6(ϕρ)–6(ϕρ), tarsi 15(ω,ω3)–11(ω,ω3)–9(ω,ω3)–9(ω,ω3).

Gnathosoma . Chelicera 136 (130–138), palp 150 (147–153). Palp setal formula (from trochanter to tarsi): 0–3– 2–2+1 claw+ 1 accessory claw–5+1ω+ 1 tridentate eupathidium. Palp femur without apophyses. Tip of the gnathosoma extends to the level of anterior border of the palp femur. Subcapitulum with two pairs of adoral setae distally and two pairs of subcapitular setae proximally. Setae m located on one pair of monocuspidate lamella. Dimension of setae: m 30 (25–30), n 28 (25–30); distances between setae: m-m 33 (30–35), m-n 25 (20–27), n-n 28 (25–30).

Materials Examined. 1 Ƥ, 1 deutonymph Ƥ, 1 3 from moss, near the brook, 40°17'27'' N, 39°35'31'' E, 1861 m, Köse Mountain, 23 VII 2007; 3 ƤƤ, 1 3 from soil under Salix sp., 40°17'29'' N, 37°46'08'' E, 621 m, between Koyulhisar-Reşadiye, 24 VII 2007; 2 ƤƤ, 1 deutonymph Ƥ, 1 3 from grassy soil, 40°16'48'' N, 39°38'09'' E, 1802 m, Köse Mountain, 21 IX 2007; 2 ƤƤ, 1 deutonymph Ƥ from soil under Trifolium sp., 40°17'18'' N, 37°46'46'' E, 631 m, Koyulhisar, 27 X 2007; 2 ƤƤ from soil under Nicotina sp., 40°37'37'' N, 36°45'44'' E, 394 m, Niksar, 28 X 2007; ZMAU.

Distribution. England ( Evans 1954) and Turkey (this paper).

Remarks. Cheylostigmaeus salinus was originally collected from a salt marsh by R. Howells ( Evans 1954) and previously was known only in England. The Turkish specimens are collected from moss, grassy soil and soil under Nicotina sp., Salix sp. and Trifolium sp. The general feature of the Turkish specimen is similar to the type specimen given by Evans (1954) but the body sizes of Turkish specimens are larger (325/238 for male and 433/259 for female) than those of the type specimen (250/150 for male and 275/154 for female (Evans 1954)); setae sci is about four fifths the size sce in the Turkish specimens but sci and sce are subequal in the original illustration of C. salinus ; leg I solenidion omega is one third of omega 3 in the Turkish specimens but about two thirds of omega 3 in the original illustration of C. salinus . We consider these differences to be minor and therefore consider the English and Turkish specimens conspecific.

Cheylostigmaeus salinus is a newly recorded species for the Turkish fauna. Description of deutonymph female of this species is given for the first time in this study.

Figures

FIGURE 5. Cheylostigmaeus salinus female. A, dorsal view of idiosoma; B, ventral view of idiosoma; C, leg I; D, leg II; E, leg III; F, leg IV.

FIGURE 6. Cheylostigmaeus salinus deutonymph female—A, dorsal view of idiosoma; B, trochanter, femur and genu of leg III; C, trochanter, femur and genu of leg IV; D, ventral view of idiosoma.