Bryaxis fronticornis, Bekchiev & Online, 2013

Bekchiev, Rostislav & Online, Published, 2013, Faunistic review and description of a new species of Pselaphinae (Coleoptera: Staphylinidae) from the Strandzha Mountains (Bulgaria and Turkey), Turkish Journal of Zoology 37 (4), pp. 431-440 : 432-439

Bryaxis fronticornis sp. nov.

Type material: (6 ♂♂, 5 ♀♀). Holotype: ♂, Bulgaria, Strandzha Mts., Stoilovo Village env., Mechi dol ( Aidere ) locality, N 42.03087 E 27.51392, 206 m, in leaf litter, 10.06.2009, leg. R . Bekchiev ( NMNHS) . Paratypes: 3 ♀♀, same data as holotype ; 2 ♂♂, 2 ♀♀, Turkey, Thrace, Kırklareli, Demirköy , 31.07.1969, leg. C. Besuchet ; 1 ♂, Turkey, Thrace, Kırklareli, Demirköy, Strandzha Mts. , Sislioba Village env., N 41.96202 E 27.90977, 52 m, in leaf litter, 03.10.2009, leg. R . Bekchiev ; 1 ♂, Turkey, Demirköy, entrance of Dupnisa Cave , N 41.84069 E 27.55604, 337, in leaf litter, 08.07.2009, leg. R . Bekchiev ; 1 ♂, Turkey, Thrace, Kırklareli, Vize, Strandzha Mts. , Sergen Village env., N 41.74361 E 27.70690, 730 m, in leaf litter, 25.05.2011, leg. R . Bekchiev . Paratypes in NMNHS and MHNG .

Description: Male. Body reddish-brown ( Figure 2a ), length 1.44–1.56 mm, maximum width of elytra 0.37–0.40 mm. Head ( Figure 2b ) almost as long as wide (0.25–0.32/ 0.28–0.31 mm), smooth and shiny, covered

Turkey Iğneada N41.85762 E27.95894 15 02.10.2009 1 1 Bibloplectus minutissimus Aubé, 1833 Bulgaria Valchanov most N41.94416 E27.60006 281 18.4.2010 1 Bibloporus minutus Raffray, 1914 Bulgaria Petrova niva N42.06394 E27.54610 96 06.5.2009 2

- N42.06164 E27.53303 132 21.8.2009 1 Mechi dol (Aidere) N42.03087 E27.51392 206 23.8.2009 2

Mladezhko N42.15125 E27.35726 231 21.8.2009 1 3

Brodilovo N42.09315 E27.83140 17 14.7.2009 2 Kondolovo, Marzevski dol N42.10076 E27.68153 284 23.8.2009 2

Lipite N42.04450 E27.98938 54 27.5.2011 1 6 Bibloporus variicolor Reitter, 1882 Bulgaria Mechi dol (Aidere) N42.03087 E27.51392 206 10.6.2009 1 Trimium caucasicum Kolenati, 1846 Bulgaria Slivarovo N41.96997 E27.65864 388 19.4.2009 3

Kosti N42.05663 E27.76423 35 03.7.2009 1

Izgrev N42.14481 E27.80899 119 08.5.2009 3 Mechi dol (Aidere) N42.03087 E27.51392 206 10.6.2009 3

Propada N41.98044 E27.49048 351 26.9.2009 1

- - - 17.4.2009 1

Marina reka N42.11158 E27.76472 172 08.5.2009 3

- N42.11158 E27.76472 172 13.7.2009 10

02.07-

Sinemorets, Butamiata N42.05286 E27.98706 5 1

03.08.2009

Papia hill N42.10658 E27.84337 300 03.7. 2009 1 4

Maslen nos N42.30771 E27.79065 13 30.5.2010 1 Turkey Vize N41.59683 E27.82825 376 07.7. 2009 1 5

- N41.58386 E27.79410 348 25.5.2011 8

Sivriler N41.74678 E27.84505 419 22.5.2010 1 Bryaxis bulbifer Rechenbach, 1816 Bulgaria Sinemorets , Butamiata N42.05286 E27.98706 5 13.6.2009 3 1 Sinemorets , Veleka river bank N42.06100 E27.96534 5 01.7. 2009 1 4

Silistar N42.02520 E28.00704 23 16.- 29.06.2008 3 3 Turkey Iğneada N41.85762 E27.95894 56 05.7.2009 1

- N41.85762 E27.95894 15 02.10.2009 1 3 Bryaxis curtisii orientali s Karaman, 195 2 Bulgaria Bataka N42.19368 E27.32662 319 05.5. 2009 1 3

Slivarovo N41.96049 E27.65967 256 25.9.2009 2 2

Indipasha N42.00469 E27.65255 211 25.9.2009 2 3

Propada N41.98044 E27.49048 351 09.6.2009 2

- - - 17.4.2009 1 1

Mladezhko N42.15125 E27.35726 231 23.9.2009 1

- - - 29.5.2010 1 Mechi dol (Aidere) N42.03087 E27.51392 206 10.6.2009 1 1

Brodilovo N42.09315 E27.83140 17 14.7.2009 3 1 Kondolovo, Marzevski dol N42.10076 E27.68153 284 23.8.2009 1

Silistar N42.02520 E28.00704 23 16.- 29.06.2008 3

Gradishte hill N41.96528 E27.49386 624 18.4.2010 1

Marina reka N42.11158 E27.76472 172 11.6.2009 1 3

Vitanovo N42.01036 E27.44767 359 28.5.2010 1

Bliznak N42.17219 E27.30987 299 19.4.2010 5 3

Valchanov most N41.94416 E27.60006 281 18.4.2010 2 1 Turkey Demirköy N41.79940 E27.73470 593 06.7. 2009 4 5

Iğneada N41.85762 E27.95894 5 02.10.2009 1 4 Bryaxis roumaniae Raffray, 1914 Bulgaria Slivarovo N41.96049 E27.65967 256 19.4.2009 1

- N41.96997 E27.65864 338 25.9.2009 2 2 Stoilovo N42.00667 E27.50393 290 07.5.2009 1 Bataka N42.19368 E27.32662 319 05.5.2009 2 15.04- - - - 1 05.05.2009 Papia hill N42.10658 E27.84337 343 16.4.2009 4 - - - 08.5.2009 1 - - - 29.5.2010 1 Marina reka N42.11158 E27.76472 172 16.4.2009 7 18 - - - 09.5.2009 3 - - - 03.7. 2009 2 3 Varvara N42.11364 E27.88858 46 14.4.2009 1 - - - 16.4.2009 1 Mladezhko N42.15125 E27.35726 231 23.9.2009 1 5 Kondolovo N42.09658 E27.66527 258 18.4.2009 4 4 Gradishte hill N41.96528 E27.49386 624 18.4.2010 1 Vitanovo N42.01036 E27.44767 359 28.5.2010 1 Valchanov most N41.94416 E27.60006 281 18.4.2010 1 Lipite N42.04450 E27.98938 54 27.5.2011 1 4 Turkey Sarpdere N41.83380 E27.55683 436 08.7. 2009 6 3 - - - 29.9.2009 2 Iğneada N41.85762 E27.95894 5 02.10.2009 2 Demirköy N41.81785 E27.81383 172 30.9.2009 1 - - - 03.10.2009 1 - N41.77108 E27.63829 804 29.9.2009 1 Sislioba N41.96202 E27.90977 52 22.5.2010 2 Sivriler N41.74678 E27.84505 419 22.5.2010 1 Bythinus balkanicus Reitter, 1885 Bulgaria Papia hill N42.10658 E27.84337 343 16.4.2009 2 2 Indipasha N42.00469 E27.65255 211 25.9.2009 2 7 Mechi dol ( Aidere ) N42.03087 E27.51392 206 23.8.2009 1 Brodilovo N42.09315 E27.83140 17 14.7.2009 1 1 Propada N41.98044 E27.49048 351 09.6. 2009 3 8 - - - 17.042009 4 2 Varvara N42.11364 E27.88858 46 26.8.2009 1 Bogdanovo, Fakiiska River N42.22602 E27.19269 125 09.6.2009 1 Kosti N42.05663 E27.76423 35 01.8.2010 1 Popovi skali N42.16274 E27.73766 26 01.7. 2009 2 2 Turkey Demirköy N41.79171 E27.83363 372 06.7.2009 3 - - - 29.9.2009 1 1 - N41.81785 E27.81383 172 30.9.2009 10 15 - - - 03.10.2009 5 7 Sislioba N41.96202 E27.90977 52 08.7.2009 1 - - - 03.10.2009 1 1 Kızılağaç N41.68393 E27.88095 141 24.5.2011 1 Bythinus leonhardinus Reitter, 1913 Bulgaria Kirovo N42.17862 E27.18284 138 05.5. 2009 2 1 Indipasha N42.00469 E27.65255 211 18.4.2009 1 Marina reka N42.11158 E27.76472 172 08.5.2009 1 Bliznak N42.17219 E27.30987 299 19.4.2010 3 1 Sinemorets, Veleka river bank N42.06100 E27.96534 5 16.4.2009 1 Brodilovo N42.09315 E27.83140 17 14.7.2009 2 3

Valchanov most N41.94416 E27.60006 281 18.4.2010 5 3

Mladezhko N42.15125 E27.35726 231 17.4.2009 6 5 Turkey Demirköy N41.79171 E27.83363 372 06.7. 2009 7 7

- N41.77108 E27.63829 820 30.9.2009 6 12

Sarpdere N41.83380 E27.55683 345 01.10.2009 1 Bythinus acutangulus lunifer Karaman ,

Bulgaria Slivarovo N41.96049 E27.65967 256 25.9.2009 1 6 1948

Mechi dol (Aidere) N42.03087 E27.51392 206 23.8.2009 2

Vitanovo N42.01036 E27.44767 359 28.5.2010 1

Propada N41.98044 E27.49048 351 10.6.2009 1 Turkey Sarpdere N41.83380 E27.55683 436 08.7.2009 1 Batrisodes buqueti (Aubé, 1833) Bulgaria Silistar N42.02520 E28.00704 17 09.5.2009 1

Petrova niva N42.06164 E27.53303 132 21.8.2009 1

Izgrev N42.14481 E27.80899 119 08.5.2009 1

Begliktash N42.31156 E27.76492 143 28.5.2011 1 Batrisodes venustus (Reichenbach, 1816) Bulgaria Bataka N42.19368 E27.32662 319 17.4.2009 1 Batrisus formicarius Aubé, 1833 Turkey Kızılağaç N41.68393 E27.88095 141 24.5.2011 1 Tychus anatolicus Besuchet, 1964 Bulgaria Sinemorets , Veleka river bank N42.06100 E27.96534 5 09.5.2009 1

Rezovo N41.98179 E28.02490 1 09.5.2009 2

Primorsko , Perla N42.28344 E27.74508 1 30.6.2009 4 5 Turkey Iğneada N41.85762 E27.95894 5 05.7.2009 2 34

- - - 02.10.2009 1 3 Tychus bysanticus Karaman , 1955 Bulgaria Varvara N42.11364 E27.88858 46 14.4.2009 1

- - - 10.5.2009 1 1

Lipite N42.04450 E27.98938 54 27.5.2011 1 Tychus niger Paykull, 1800 Bulgaria Kirovo N42.17862 E27.18284 138 05.5. 2009 1 1

Bliznak N42.17219 E27.30987 299 19.4.2010 1 4

Veleka River , Diado Pavel N42.03253 E27.62008 91 18.4.2009 1 Tychus pullus Kiesenwetter, 1858 Bulgaria Sinemorets, Butamiata N42.05286 E27.98706 5 16.4.2009 4 12 Tychus apfelbecki Karaman, 1955 Bulgaria Kirovo N42.17862 E27.18284 138 05.5.2009 1

Mladezhko N42.15024 E27.36229 248 18.4.2009 1 Brachygluta trigonoprocta, Ganglbauer ,

Bulgaria Propada N41.98044 E27.49048 351 10.6.2009 3

1895

Kovach N42.08331 E27.43258 190 09.6.2009 1

Bliznak N42.17219 E27.30987 299 19.4.2010 1 3

Popovi skali N42.16274 E27.73766 26 01.7.2009 2

Vitanovo N42.01036 E27.44767 359 28.5.2010 1 Turkey Sarpdere N41.83380 E27.55683 436 08.7.2009 30 Brachygluta foveola Motschulsky, 1840 Bulgaria Sinemorets , Veleka river bank N42.06100 E27.96534 5 02.7.2009 2

Kovach N42.08331 E27.43258 190 09.6.2009 1 Turkey Iğneada N41.85762 E27.95894 5 05.7. 2009 14 2

- - - 01.10.2009 30 75 Brachygluta helferi longispina (Reitter,

Bulgaria Sinemorets , Veleka river bank N42.06100 E27.96534 5 27.9.2009 1 1 1884 )

Turkey Iğneada N41.85762 E27.95894 5 01.10.2009 36

15.4–

Brachygluta fossulata Reichenbach, 1816 Bulgaria Sinemorets , Veleka river bank N42.06100 E27.96534 5 1

09.5.2009

09.6–

Sinemorets , Veleka river bank N42.06100 E27.96534 5 1

02.7.2009 Brachygluta haematica 09.6–

Bulgaria Kosti N42.05663 E27.76423 35 1 (Reichenbach, 1816) 02.7.2009

08.5– - - - 1 09.6.2009

Popovi skali N42.16274 E27.73766 26 01.7.2009 7

Primorsko, Perla N42.28344 E27.74508 1 10.5.2009 3

Brachygluta tibialis Aubé, 1864 Bulgaria Rezovo N41.98179 E28.02490 1 09.5. 2009 1 2

Fagniezia impressa Panzer, 1805 Bulgaria Primorsko , Perla N42.28344 E27.74508 1 10.5.2009 11 11

Rezovo N41.98179 E28.02490 1 09.5.2009 1

Turkey Iğneada N41.85762 E27.95894 5 05.7.2009 12

- - - 01.10.2009 50

Trissemus antennatus serricornis Bulgaria Sinemorets , Butamiata N42.05286 E27.98706 5 16.4.2009 1 Schmidt-Göbel, 1838

- - - 13.6.2009 1 1

Petrova niva N42.06394 E27.54610 96 06.5.2009 1

Silistar N42.02520 E28.00704 17 09.5. 2009 9 9

Kirovo N42.17862 E27.18284 138 05.5.2009 3

Mladezhko N42.15125 E27.35726 231 23.9.2009 1

Popovi skali N42.16274 E27.73766 26 01.7.2009 1

Malko Tarnovo N41.98928 E27.52467 317 18.4.2010 3 3

- - - 28.5.2010 1 2 08.5– Slivarovo N41.96049 E27.65967 256 1 09.6.2009 Rezovo N41.98179 E28.02490 1 09.5. 2009 3 3

Bliznak N42.17219 E27.30987 299 19.4.2010 4 19

Lipite N42.04450 E27.98938 54 25.9.2010 2 3

Turkey Iğneada N41.85762 E27.95894 5 06.7.2009 5 59

- - - 01.10.2009 3

Sislioba N41.96202 E27.90977 52 03.10.2009 1 1

Rybaxis longicornis Leach, 1817 Bulgaria Sinemorets , Veleka river bank N42.06100 E27.96534 5 25.8.2009 1 1

- - - 12.6.2009 1

- - - 09.5.2009 1

- - - 02.7. 2009 1 4

Rezovo N41.98179 E28.02490 1 09.5. 2009 3 3

Turkey Iğneada N41.85762 E27.95894 5 06.7.2009 14 14

- - - 01.10.2009 3 4

Rybaxis gigas Baudi di Selve, 1870 Bulgaria Sinemorets , Butamiata N42.05286 E27.98706 5 16.4.2009 1

Sinemorets , Veleka river bank N42.06100 E27.96534 5 09.5.2009 1

Ctenistes palpalis Reichenbach, 1816 Bulgaria Malko Tarnovo N41.98928 E27.52467 317 18.4.2010 2 4

- - - 28.5.2010 1

Turkey Sarpdere N41.83380 E27.55683 316 08.7.2009 1

Tyrus mucronatus Panzer, 1805 Bulgaria Kondolovo , Marzevski dol N42.10076 E27.68153 284 18.4.2009 3 4

Petrova niva N42.06164 E27.53303 132 06.5.2009 1

- - - 21.8.2009 1

Brodilovo N42.09315 E27.83140 17 14.7.2009 2

Turkey Sarpdere N41.83380 E27.55683 316 01.10.2009 1

Centrotoma lucifuga Hayden, 1849 Turkey Beypınar N41.76455 E27.47058 457 25.5.2011 1

Pselaphus caucasicus Motschulsky, 1845 Bulgaria Malko Tarnovo N41.98928 E27.52467 317 19.4.2010 1

Turkey Sarpdere N41.83380 E27.55683 316 01.10.2009 1

Claviger (Clavifer) sp. Bulgaria Kondolovo N42.09957 E27.66749 320 19.4.2009 2 3

Malko Tarnovo N41.98394 E27.51794 300 28.5.2010 1

Turkey Kızılağaç N41.68393 E27.88095 141 24.5.2011 1

with sparse, long, golden, suberect setation. Frons with well-defined but shallow impression between antennal tubercles, bordered by 2 lateral carinae; rostrum prominent, in dorsal view extended to anterior margin of clypeus and covered with short, erected, golden setae. Median longitudinal occipital carina well defined; vertexal foveae deep, situated close to a hypothetical line joining anterior margins of eyes. Eyes small but well visible in dorsal view, each composed of 10–14 facets. Maxillary palpi long, palpomere I pedunculate, palpomere II very small, palpomere III 0.25–0.27 mm long. Antennae relatively short (0.58–0.59 mm), when bent backwards slightly exceeding base of elytra; scape ( Figure 2c ) about twice as long as wide; pedicel simple, slightly longer than wide (0.068 / 0.051 mm); antennomere III as long as pedicel; IV–VI subequal in length, each about 0.034 / 0.034 mm; VII wider than long (0.017 / 0.034 mm); VIII as long as wide, about 0.017 / 0.017 mm; IX about 3 times as wide as long (0.051 / 0.017 mm); X about twice as wide as long (0.068 / 0.034 mm); XI about twice as long as wide, acute at apex. Pronotum (0.34/ 0.37 mm) covered with long, recumbent, dense setae, widest in anterior half, 1.20–1.30 times as long as head. Elytra (0.59/ 0.63 mm), 1.75 times as long as pronotum, covered with long, suberect setae. Terminal abdominal tergite (VIII) strongly modified ( Figures 2d and 2e ). Legs with robust femora and slender tibiae, pro- and mesotibiae simple, with short, robust setae in the internal apical part only, metatibiae with short internal apical spur. Aedeagus 0.27–0.28 mm long ( Figures 2f and 2g ).

Sexual dimorphism: Female with eyes composed of 4–5 ommatidia; frontal lobe with small, not as prominent as in the male, rostrum. Scapus simple, longer than wide (0.085 / 0.051 mm); pedicellus simple (0.068 / 0.034 mm). Apical part of abdomen without modifications.

Differential diagnosis: Bryaxis fronticornis sp. nov. belongs to the Bryaxis curtisii species group, as defined by Besuchet and Kurbatov (2007). The frontal lobe is bigger than half of the head, bearing secondary sexual characters; the metafemur has a line of setae on the inner part. The new species differs from all other members of this group in the shape of scapus and pedicel, the structure of aedeagus, and by the unique modifications of the last abdominal tergite.

Etymology: The name refers to the prominent hornlike projection of the frontal lobe.

Figures

Figure 2. Bryaxis fronticornis sp. nov.(holotype male): a) habitus (scale: 0.75 mm); b) head (scale: 0.43 mm); c) left scapus in dorsal view (scale: 0.1 mm); d, e) abdominal tergite VIII – ventral and posteroventral views (scale: 0.17 mm); f, g) aedeagus – dorsal and lateral view (scale: 0.14 mm).