A New Species and New Records for the Subfamily Aleocharinae from Turkey

In this study, a new Aleocharinae (Coleoptera: Staphylinidae) species from Turkey, Gyrophaena cagatay sp. n. (Aksaray), is described and illustrated. In addition, new records are presented for seven species: Atheta hygrotopora (Kraatz, 1856), Atheta incognita (Sharp, 1869), Atheta ripicola Hanssen, 1932, Brachyusa concolor Erichson, 1839, Ischnopoda leucopus (Marsham, 1802), Ischnopoda subaenea Eppelsheim, 1890, and Liogluta granigera Kiesenwetter, 1850. Photographs of the habitus of male and female specimens are presented. The 8th tergite and aedeagus of the male and the spermatheca of the female are also illustrated for the new species. Differential diagnosis guidelines are given for comparisons with Gyrophaena rousi Dvořak, 1966.


Introduction
The members of Gyrophaena, Aleocharinae (Coleoptera: Staphylinidae), are obligate inhabitants of fresh mushrooms as larvae and adults. They live on both polypore and gilled mushrooms. Adults appear on mushrooms soon after the gills are exposed or the hymenium area becomes active, and both larvae and adults occupy more mature mushrooms. Gyrophaenines inhabit only fresh mushrooms and are usually among the first insects to appear on them (Ashe 1984). Until recently, the genus Gyrophaena Mannerheim, 1830 was represented by 10 species in Turkey (Anlaş 2009). Following Assing's recent studies (2009 and2011), two new species and three new records were added to this number. With the newly described species, the total number of Gyrophaena species found in Turkey has been raised to 16.

Materials and Methods
Field studies were conducted from 2009-2011 in 13 cities in the Central Anatolian Region of Turkey. Insects were sampled by using aerial nets, sifting through ground and leaf debris, inspecting mushrooms and using burying traps. Insects were killed with 95% ethanol and ethylacetate. The coordinates of the localities of the specimens were recorded using a GPS. At the end of the field study, the insects were brought to the laboratory for identification and placed in a collection. The identifications were made using the methods from Lohse (1974), Pasnik (2006, Brundin (1944), and Strand and Vik (1964). The province, county, coordinates of localities, altitude, and collecting dates, together with the numbers of male and female specimens, are given below.
Gyrophaena cagatay sp. n. was compared to the most similar species, Gyrophaena rousi Dvořak, by means of the male 8 th tergite and the structure of the aedeagus.

Description: Habitus as in
Head distinctly transverse, 1.26-1.3 times wider than its length, head length from anterior margin of clypeus to neck is 0.27 mm and maximal head width including eyes is 0.34 mm, vertex surface with round, distinct, and sparse punctures ( Figure 1C); length of antennae is 0.68 mm, antennae moderately long, segment II narrower and shorter than segment I, segment III narrower and shorter than segment II, segment IV short, distinctly widened  apically, segments V-X approximately equal in length and width, slightly widened apically.
Pronotal length along midline is 0.58 mm, pronotum distinctly transverse, 1.4-1.5 times wider than its length and 1.5-1.6 times wider than head; surface with rounded, few, and sparse punctures, wider at medial ( Figure 1D). Maximal elytral length from base to posterior margin is 0.54 mm and total width of elytra is 0.71 mm, elytra 1.3-1.4 times wider than pronotum, surface with sparse and small punctures. Abdomen short, more or less widened. Male: 8 th tergite with two small and two slightly wider, rounded punctures medially; posterior margin of 8 th tergite without short appendages and slightly concave, laterally on each side with two long, pointed and slightly inward curved process ( Figure 2E). Entire body with dense and distinct reticulate microsculpture. Aedeagus bulbus with a proximal tooth-like process; median lobe with ventral process wide at base, slightly convex on ventral side and finger-shaped narrowed through apical; dorsal inner sac sclerite narrow and whip-shaped with pointed apex; ventral inner sac sclerite sinuous and sickleshaped with pointed apex ( Figure 2D). Spermatheca, with wide head; neck with a collarshaped projection on one side and tuber-like projection on the other side; body with a pointed apex ( Figure 1E and F).

Etymology:
The new species is named after the our honorable advisor, Professor Neşe Çağatay, PhD.

Distribution and Bionomics:
The specimens were sifted from mushrooms (Figure 3) from the Hasan Mountain hillside, Aksaray province at an altitude of 1708 m a.s.l.

Comparative Notes:
Gyrophaena sp. n. undoubtedly most closely resembles Gyrophaena rousi Dvořak, 1966. The antennae of Gyrophaena cagatay sp. n, especially the second segment, is thicker than that of G. rousi in general. The third segment is slightly longer and thinner than in G. rousi. Segments V-X are apparently transverse, broader than long. The last segment is narrowed through apical and has a length:width ratio of 1.6:1 instead of the 2.1:1 ratio in G. rousi from Welch, 2000 (Figure 2 C and F). New species could be reliably distinguished from congeners by means of the 8 th male tergite and the aedeagus (Figure 2 A, B, D, and E). The new species' 8 th male tergite and aedeagus are given for comparison. The aedeagus differs from that of G. rousi, which is the most similar species, in the male genitalia structure. Gyrophaena cagatay sp. n. could be differentiated based on the following characteristics: the widened part of the median lobe is narrower than that of G. rousi; the dorsal inner sac sclerite is approximately twice as long as the median lobe and distinctly curved inward through apical, while it is approximately equal in length to the median lobe and slightly curved inward in G. rousi; the ventral inner sac sclerite is sinuous and sickle shaped with two foldings on the medial and distal parts, while it is stick-shaped and has only one folding on the distal part in G. rousi. Distribution: According to Smetana, 2004, I. subaenea was reported to exist only in Georgia. The species is reported to exist in Turkey for the first time. The specimen was collected from a river bank under a stone.