Eustigmaeus absens, Sali & Doğan, 2005

Sali & Doğan, H, 2005, Eustigmaeus mites from Turkey (Acari: Stigmaeidae), Journal of Natural History 39 (11), pp. 835-861 : 847-850

Eustigmaeus absens n. sp.

( Figures 8 , 9 )

Type materials

Holotype female and 94 paratype females from moss and lichen on grassy soil, Beğendik Village, Olur , Erzurum, 29 August 2001.

Female

Holotype: length of body (excluding gnathosoma) 417, width 320.

Dorsum

Dorsal shields polygonally dimpled, dimples bearing fine punctations. Surface between dimples with a few fine punctations. Margins of dorsal shields and anterior edge of hysterosomal shield less sclerotized. Fossettes on dorsal shields as illustrated. Prodorsal shield with four pairs of setae and one pair of eyes. Hysterosomal shield with five pairs of setae, e 2 absent. Suranal shield with two pairs of setae. Dorsal body setae notched, with axial core. Postocular setae sci small. Setae h 1 and h 2 dissimilar to other dorsal body setae, densely notched, h 1 with core but h 2 without core. Dimensions of setae as follows: υi 70, υe 7, sci 77, sce 52, c 1 87, c 2 23, d 1 90, d 2 56, e 1 91, f 1 83, h 1 50, h 2 23. Distance between setae: υi–υi 28, υe–υe 127, υi–υe 67, sci–sci 207, υe–sci 50, sce–sce 297, sci–sce 73, c 1 –c 1 100, d 1 –d 1 190, c 1 –d 2 117, c 1 –d 1 110, c 1 –f 1 237, d 2 – d 2 300, d 1 – d 2 70, e 1 –e 1 157, d 1 –e 1 87, d 1 –f 1 133, f 1 – f 1 107, e 1 –f 1 41, h 1 –h 1 43, h 2 –h 2 95, h 1 –h 2 36.

Venter

Setae c 2 similar to sci, humeral shields with dimples. Humeral regions with major and minor callosities covered by dimples, incorporated in the margins of the dorsal shields. Coxisternal shields completely divided with polygonal dimples and bearing 1a, 3a and 4a. Surface on coxae densely punctated and with faint reticulations. Aggenital shield with faint reticulations, two pairs of subequal setae. Pseudanal covers with fine punctations, three pairs of setae, subequal in length. Suranal shield ‘‘V’’-shaped with dimples.

Legs

Leg I 320, leg II 247, leg III 250, leg IV 300. 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 1-1-1-1, coxae 2-2-2-2. All tarsi with solenidion v. Lengths of solenidia on tarsi: v 1 23, v 2 17, v 3 6, v 4 4. Lengths of solenidia on tibiae: w 8, w p 1 16, w p 2 13, w p 35 w p 4 7.

Male

Unknown.

Etymology

The name of this new species, absens , refers to the absence of setae e 2.

Remarks

This species is unique in that the hysterosomal shield bears five pairs of setae and trochanter III bears one seta. It may belong to a new genus, as numbers and positions of dorsal body setae are considered as generic significance. However, it seems prudent to await the descriptions of more species lacking setae e 2, thus strengthening the generic significance of their character.

Figures

Figure 8. Eustigmaeus absens n. sp. (female): (A) dorsal view; (B) dorsal ornamentation; (C) dorsal setae.

Figure 9. Eustigmaeus absens n. sp. (female): (A) ventral view; (B) lateral view.