A new species of the genus Stigmaeus koch (Acari: Stigmaeidae) from Kurdistan province, Iran and description of male of Prostigmaeus khanjanii Bagheri and Ghorbani

A new species of the genus Stigmaeus, S. kurdistaniensis n. sp. is described and illustrated based on females collected from soil under apple trees, Ghorveh city, Kurdistan province, Iran. In addition, the male of Prostigmaeus khanjanii Bagheri and Ghorbani, 2010 is described. A key to all known Iranian species of the genus Stigmaeus is provided.


MATERIALS AND METHODS
Mites were collected from soil under apple and fig trees in Kurdistan and Hamedan provinces and mounted directly in Hoyer's medium. The specimens were measured, identified and drawn by means of an Olympus BX 51 differential interference contrast microscope under 1000X magnification and equipped with a drawing tube. Body length measurements represent the distance between base of gnathosoma and end of idiosoma; width was measured above coxae III. Setae were measured from the setal base to the tip of the seta; distances between setae were measured between setal bases. Legs measurements are from trochanter to tip pretarsus.
The terminology and abbreviations used in the description of the new species follows that of Kethley (1990). Leg chaetotaxy is adapted from Fan and Zhang (2005). All measurements are given in micrometers and the measurements of the paratype are given in parentheses.

Remarks -The new species
Stigmaeus kurdistaniensis n. sp. resembles S. siculus (Berlese, 1883) in that dorsal shields are reticulated, median hysterosomal shield with two setae, pob present, eyes and h3 absent. However it differs from the latter in: all dorsal and ventral setae longer than that of S. siculus; ventral infracapitulum and all leg and palp segments with reticulations in E. kurdistaniensis instead of smooth in S. siculus and pob small, between setae ve-sci in the new species instead of large in S. siculus.
The new species also resembles S. echinopus Summers, 1962, in having all leg and palp segments with reticulations, suranal shield entire and reticulated, pob present and median hysterosomal shield with two setae. However, S. kurdistaniensis differs from the latter in: aggenital shield reticulated instead of smooth in S. echinopus, all dorsal and ventral setae longer than those of S. echinopus and genual setae κ short in S. kurdistaniensis in contrast to long in S. echinopus.

Immature stages -Unknown.
Etymology -The species is named after the locality where it was collected, namely Kurdistan province.

Legs (Figures 3E-H) -Length of leg I 163
Remarks -Males of this species exhibit all fea-55 tures of the female descriptions, except that the male tarsi I-IV are with two solenidia instead of one solenidion in female, zonal and intercalary shields fused, bearing 2 pairs of setae (e 1 , f 1 ) whereas completely separate in the female.