Geostiba (Tropogastrosipalia) sandiklica, B & Anlaş, 2020

B, Semih Örgel & Anlaş, Sinan, 2020, Description of three new species of Geostiba Thomson, 1858 (Coleoptera: Staphylinidae, Aleocharinae) from central western Anatolia, Turkish Journal of Zoology 44 (2), pp. 156-164 : 158-160

Geostiba (Tropogastrosipalia) sandiklica sp. nov. ( Figures 1 and 3A–3K )

Type material. Holotype: TURKEY: ♂, “TR— Afyonkarahisar province, Şuhut district, 6 km S Başören village, Sandıklı Mountains , 2130 m, 38°24′32″N, 30°25′04″E, 18.V.2014, leg. Anlaş, Yağmur & Örgel / Holotypus ♂ Geostiba (Tropogastrosipalia) sandiklica sp. n. det. S. Örgel & S. Anlaş 2019” ( AZMM) . Paratypes (total: 23 exs.): TURKEY: 2♂♂, 9♀♀, same locality and date as holotype; 3♂♂, 6♀♀, Afyonkarahisar province, Şuhut district, 7 km S Başören village, Sandıklı Mountains , 2148 m, 38°24′23″N, 30°25′17″E, 17. V .2014, leg. Anlaş, Yağmur & Örgel; 1♂, 2♀♀, Afyonkarahisar province, Şuhut district, 4 km W Başören village, Sandıklı Mountains , 1880 m, 38°28′22″N, 30°23′18″E, 17. V .2014, leg. Anlaş, Yağmur & Örgel (all AZMM).

Etymology. The name derives from the Sandıklı Mountains.

Description. Habitus as in Figures 3A (male), 3B (female), and 3C (male). Body 2.3–3.3 mm.

Coloration. Head dark brown; pronotum reddish brown; elytra pale reddish brown; abdomen blackish; legs yellowish brown; antennae reddish brown.

Head. 0.98 times as wide as long; microreticulation very shallow; eyes reduced, 1/3 as long as postocular region in lateral view ( Figure 3D ). Antennomere I 1.26 times longer than II, IV–X transverse, XI dilated and approximately as long as IX and X combined.

Pronotum. Distinctly oblong; 1.18 times as long as wide; 1.25 times as wide as head; covering scutellum; posterior margin convex; microreticulation fine.

Elytra. 0.55 times as long as and 1.12 times as wide as pronotum; lateral margins not elevated; sutural carina low and extending about 1/3 length of elytral suture ( Figure 3E ); microreticulation fine; punctation distinctly granulose; hind wings totally reduced.

Abdomen. 0.93 times as wide as elytra; tergites III and IV unmodified; process of tergite VII short and stout in lateral view ( Figure 3F ), narrow and apically acute in dorsal view ( Figure 3G ); posterior margin of sternite VIII convex, without modified setae ( Figure 3H ).

Aedeagus. Median lobe 0.27 mm long ( Figures 3I and 3J ); cristal process narrow in lateral view.

Sexual dimorphism: Pronotum, elytra, and abdomen with sexual dimorphism. Female pronotum distinctly shorter than male pronotum. Female elytra without sutural carinae and female abdominal tergite VII unmodified. Sternite VIII with very weakly modified setae. Distal portion of spermatheca weakly dilated ( Figure 3K ).

Differential diagnosis: G. sandiklica sp. nov. is associated with G. fodens Assing, 2011 (Davraz Tepe, Isparta). In G. fodens , the posterior margin of the pronotum is strongly convex in the middle, the sutural carinae are very narrow and low on the elytra, and the median lobe of the aedeagus has a very fine cristal process, but in G. sandiklica sp. nov., the posterior margin of the pronotum is weakly convex, the sutural carinae are wider and higher, and the cristal process of the median lobe of aedeagus is stronger than in G. fodens .

Bionomics: Material was collected under stones in meadow at elevations between 2148 and 1880 m.

Figures

Figure 1. Distributions ofG. ahirensis sp. nov. (open circle);G.sandiklica sp. nov. (open square);G.karakusensis sp. nov. (open triangle); G. fodens Assing, 2011 (filled triangle); G. perfodens Assing, 2011 (filled circle); G. burdurica Assing, 2011 (filled square); and G. akiana Assing, 2011 (filled star).

Figure 3. Details of Geostiba sandiklica sp. nov. A) Male forebody; B) female forebody; C) male abdomen in dorsal view; D) head in lateral view; E) male elytra in lateral view; F) male abdomen in lateral view; G) male abdominal tergite VII in dorsal view; H) male abdominal sternite VIII in dorsal view; I) aedeagus in lateral view; J) aedeagus in ventral view; K) spermatheca;. Scale bars: 0.5 mm for A–C, F and 0.1 mm for D, E, G–K.