Batriscenellus orientalis ( Loebl , 1973)

Kang, Jun-Young, Park, Sun-Jae, Kim, A-Young & Park, Jong-Seok, 2021, Revision of Korean species of the genus Batriscenellus Jeannel (Staphylinidae, Pselaphinae, Batrisitae) with description of one new species, ZooKeys 1033, pp. 159-171 : 159

Batriscenellus orientalis ( Loebl, 1973) Figs 7 , 8

Batrisiella orientalis Löbl, 1973: 322.

Batriscenellus orientalis : Nomura 1991: 317. Kim et al. 1994: 144. Cho and Ahn 2001: 53. Löbl and Besuchet 2004: 276. Shao et al. 2010: 67. Yin et al. 2011: 37. Park et al. 2013: 123. Schülke and Smetana 2015: 366.

Batriscenellus (Coresoscenellus) brachygaster Nomura & Lee, 1993: 13. Nomura 2005: 214.

Material examined.

3♂♂ (1♂, aedeagus dissected and mounted in Euparal on clear plastic card, CBNUIC), Gangwon Prov. , Jungyeong-gil , Miro-myeon, Samcheok-si, 69 m, 37°22'02.80"N, 129°05'06.60"E, 22 VIII 2018, Y-J Choi, light trap ; 1♂ (CBNUIC), Chungbuk Prov. , Jecheon-si , Hansu-myeon, Songgye-ri, 258 m, 36°52'53.40"N, 128°05'06.80"E, 23 V 2019, Y-J Choi, sifting litter near stream ; 1♀ (CBNUIC), Chungbuk Prov. , Mt. Worak , Mireuksonggye-ro , Hansu-myeon, Jecheon-si, 220 m, 36°52'07.60"N, 128°05'10.80"E, 14 VI 2018, Y-J Choi, sifting litter ; 1♂ (CBNUIC), Gyeongbuk Prov. , Uljin-gun , Onjeong-myeon, Woeseonmi-ri, 592 m, 36°45'28.30"N, 129°18'05.30"E, 9 VIII 2018, J-W Kang, sifting leaf litter ; 1♂ (CBNUIC), Gyeongbuk Prov. , Mungyeong-si , Sanyang-myeon, Sinjeon-ri, 74 m, 36°36'16.00"N, 128°15'47.00"E, 9 V 2019, U-J Byeon, M-H Song, sifting leaf litter ; 2♀♀ (CBNUIC), Jeonnam Prov. , Haenam-gun , Gyegok-myeon, Dangsan-ri, 211 m, 34°40'53.00"N, 126°38'56.00"E, 18 V 2019, J-S Park, M-H Song, leaf litter & dead wood debris ; 1♀ (CBNUIC), Gyeongbuk Prov. , Yeongju-si , Munsu-myeon, Wolho-ri, 172 m, 36°45'45.61"N, 128°37'25.73"E, 4 V 2019, M-S Jang, sifting leaf litter ; 1♀ (CBNUIC), Gyeongbuk Prov. , Yecheon-gun , Yongmun-myeon, Sanggeumgok-ri, 220 m, 36°41'51.00"N, 128°24'18.00"E, 5 V 2019, U-J Byeon, sifting leaf litter ; 1♀ (CBNUIC), Gyeongbuk Prov. , Yecheon-gun , Yongmun-myeon, Nosa-ri, 246 m, 36°40'57.00"N, 128°22'31.00"E, 19 VII 2019, U-J Byeon, sifting leaf & soil litter .

Diagnosis.

This species can be distinguished from the other Batriscenellus species by the following combination of characters: antennomere 1 subquadrate with dense yellowish trichomes; elytra with lateral process; right margin of apical lobe of male genitalia expanded in dorsal view (Fig. 8A, B ); paramere of male genitalia curved to left in dorsal and lateral views (Fig. 8C, D ).

Description.

Length 1.71-2.09 mm. Body reddish-brown (Fig. 7A ). Head. All antennomeres with tubercles and long setae (Fig. 7B ). Antennomere 1 subquadrate with dense yellowish trichomes on lateral margin (Fig. 7B : arrow), 2-7 rectangular, 8 subquadrate and smallest, 9 rhombic, 10 subquadrate, 11 oval. Thorax. Mesoventrite with pair of lateral setiferous patches. Each elytron with one discal stria. Abdomen. Abdominal tergite IV expanded (Fig. 5C ). Abdominal ventrite IV with lateral setiferous patches.

Distribution.

South Korea (Fig. 9 : diamond), Japan, China.

Habitat.

Most specimens of this species were collected by sifting leaf litter or dead wood debris. One specimen was captured by a light trap.

Figures

Figure 5. Habitus figures of Batriscenellus auritus A dorsal view B antennae C dorsal view of abdomen D ventral view of abdomen. Scale bars: 1 mm (A), 0.5 mm (B-D).

Figure 7. Habitus figures of Batriscenellus orientalis A dorsal view B antennae C dorsal view of abdomen D ventral view of abdomen. Scale bars: 1 mm (A), 0.5 mm (B-D).

Figure 8. Aedeagi of Batriscenellus orientalis A, B dorsal view C, D lateral view. Scale bars: 0.1 mm.

Figure 9. Collection localities of Batriscenellus koreanus sp. nov.: square; B. vicarius: circle; B. auritus: triangle; B. orientalis: diamond.