Eustigmaeus fani, Sali & Doğan, 2005

Sali & Doğan, H, 2005, Eustigmaeus mites from Turkey (Acari: Stigmaeidae), Journal of Natural History 39 (11), pp. 835-861 : 854-858

Eustigmaeus fani n. sp.

( Figures 12–14 )

Type materials

Eleven females from moss on soil, Yukarı Parmaksız, Hınıs , Erzurum, 19 May 2000 ; six females and two males from soil and litter under Pinus sylυestris, Deve Mountain , I ˙˙spir, Erzurum, 4 August 2001 .

Female

Holotype: length of body (excluding gnathosoma) 423, width 277.

Dorsum

Dorsal shields slightly sclerotized, bearing fine punctations and round dimples, uniform in size. Dorsal dimples faint or shallow, only those on marginal area of dorsal shields discernible. No visible fossettes on dorsal shields. Propodosomal shield with four pairs of setae and one pair of eyes. Hysterosomal shield with six pairs of setae, suranal shield with two pairs of setae. Dorsal body setae slightly spinulated, with acute tips, hyaline sheath and very slender axial core, difficult to identify in some specimens. Setae h 1 and h 2 similar to other dorsals, but with more obvious spinules. Dimensions of setae as follows: υi 50, υe 55, sci 5 sce 47, c 1 50, c 2 25, d 1 47, d 2 43, e 15 f 1 60, e 2 50, h 1 43, h 2 33. Distance between setae: υi–υi 30, υe–υe 110, υi–υe 57, sci–sci 187, υe–sci 50, sce–sce 240, sci–sce 57, c 1 –c 1 107, d 1 –d 1 163, c 1 –d 2 90, c 1 –d 1 103, d 2 – d 2 267, d 1 – d 2 77, e 1 –e 1 167, e 2 –e 2 240, e 1 –e 2 74, d 1 –e 15 d 2 –e 2 90, d 1 – e 2 43, f 1 –f 1 117, e 1 –f 1 37, e 2 –f 1 113, h 1 –h 1 33, h 2 –h 2 97, h 1 –h 2 33.

Venter

Humeral shields smooth or with faint round dimples, bearing setae c 2. Humeral setae approximately half as long as preocular setae υe. Humeral regions with major and minor callosities. The callosities finely punctate, not conjunct with margins of dorsal shields. Surface of coxae densely punctate, without apparent reticulum. Coxisternal shields completely divided, with polygonal dimples and with 1a, 3a and 4a. Aggenital shield with polygonal dimples and three pairs of subequal setae. Pseudanal covers with three pairs of subequal setae. Suranal shields smooth or weakly dimpled.

Legs

Leg I 267, leg II 217, leg III 217, leg IV 253. Number of setae (solenidia in parentheses) on leg segments (I–IV) as follows: tarsi 14(v)-10(v)-8(v)-8(v), tibiae 7(w, w p)-6(w p)-6(w p)-6(w p),

genua 4(k)-4(k)-1-1, femora 6-5-3-2, trochanters 1-1-2-1, coxae 2-2-2-2. Lengths of solenidia on tarsi: v 1 23, v 2 17, v 3 7, v 4 4.

Male

Length of body (excluding gnathosoma) 297, width 167.

Dorsum

Dorsal ornamentation as in female but dorsal dimples indiscernible. Dorsal body setae different from those of female, subspatulate distally. Dimensions of setae as follows: υi 5 sce 33, υe 37, sci 27, c 1 30, c 2 20, d 15 d 2 33, e 1 27, e 2 30, f 1 37, h 1 14, h 2 33. Distance between setae: υi–υi 23, υe–υe 75, υi–υe 40, sci–sci 127, υe–sci 30, sce–sce 157, sci–sce 37, c 1 –c 1 77, d 1 – d 1 90, c 1 –d 1 60, c 1 –d 2 47, d 2 – d 2 160, d 1 – d 2 50, e 1 –e 1 67, e 2 –e 2 110, e 1 – e 2 33, d 1 – e 1 53, d 2 –e 2 70, d 1 – e 2 27, f 1 –f 1 60, e 1 –f 1 13, h 1 –h 1 27, h 2 –h 2 50, h 1 –h 2 13.

Venter

As in female but ophistosoma with two pairs of aggenital setae. Pseudanal covers with three pairs setae, ps 1, 2 peg-like.

Legs

Leg I 250, leg II 207, leg III 187, leg IV 217. Number of setae (solenidia in parentheses) on leg segments (I–IV) as follows: tarsi 15(v, v„)-11(v, v„)-9(v, v„)-9(v, v„), tibiae 7(w, w p)- 6(w p)-6(w p)-6(w p), genua 4(k)-4(k)-1-1, femora 6-5-3-2, trochanters 1-1-2-1, coxae 2-2-2-2. All tarsi with solenidia v and v„.

Etymology

This species is named in honour of Dr Qing-Hai Fan, Fujian Agricultural and Forestry University, China.

Remarks

This new species closely resembles E. ottaυii Berlese, 1910 in that dimples on the dorsal shields are very shallow and indiscernible mid-dorsally. However, it differs from the latter species in length of the dorsal body setae, in the humeral setae c 2 being approximately half as long as preocular setae υe, and fossettes on dorsal shields indistinct. Dorsal body setae of Eustigmaeus fani have many minute spinules, but those of E. ottaυii have five to eight spinules. This species also resembles E. manapouriensis ( Wood, 1966) , but can be easily distinguished from it by having major and minor callosities and three pairs of aggenital setae.

Figures

Figure 12. Eustigmaeus fani n. sp. (female): (A) dorsal view; (B) ventral view; (C) lateral view.

Figure 13. Eustigmaeus fani n. sp. (female): (A) leg I; (B) leg II; (C) leg III; (D) leg IV.

Figure 14. Eustigmaeus fani n. sp. (male): (A) dorsal view; (B) ventral view.