Aloconota impressa Lee and Ahn, 2017

Lee, Seung-Gyu & Ahn, Kee-Jeong, 2017, A taxonomic study of Korean Aloconota Thomson (Coleoptera: Staphylinidae: Aleocharinae) with descriptions of five new species, Journal of Natural History 51 (25 - 26), pp. 1531-1556 : 1542-1546

Aloconota impressa Lee and Ahn sp. nov.

( Figure 1 (d), 6(a – f), 7(a – h))

Description

Length 2.3 – 3.2 mm. Body ( Figure 1 (d)) surface glossy and densely pubescent, with fine microsculpture. Body dark brown; legs slightly paler than other parts. Head. Quadrate, approximately 1.0 – 1.1 times as long as wide, widest across eyes, slightly narrower than pronotum; eyes slightly large and prominent, about 1.4 – 1.5 times as long as temples; gular sutures moderately separated, more or less diverged basally; infraorbital carina absent; cervical carina complete. Antennae ( Figure 7 (a)) long and slender, longer than head and pronotum combined; antennomeres 1 – 3 elongate, 1 longest, 2 longer than 3, 4 slightly elongate, 5 – 6 about as long as wide, 7 – 10 slightly transverse, 11 longer than wide, about as long as preceding two combined. Mouthparts. Labrum ( Figure 6 (a)) transverse, emarginate in anterior margin, with Ε- sensillum and eight macrosetae on each side of midline; epipharynx ( Figure 6 (b)) with several sensilla, including two lateral sensory rows on each side of midline; β- and γ- sensilla very short, β- sensillum blunt and γ- sensillum convergent apically. Mandibles ( Figure 6 (c,d)) about 1.6 – 1.7 times as long as basal width; right one ( Figure 6 (c)) with small internal tooth, internal margin serrulate; prostheca composed of three portions. Galea and lacinia of maxilla ( Figure 6 (e)) long and slender; lacinia composed of nine spines in distal comb region, isolated spines absent; maxillary palpomere 1 smallest and about 2.0 times as long as wide, 2 about 2.6 – 2.8 times as long as wide, 3 slightly longer than 2, about 2.4 – 2.5 times as long as wide, 4 digitiform, filamentous sensilla reaching to basal half. Prementum ( Figure 6 (f)) with two basal pores widely separated, about 4.0 – 5.0 times width of basal pore; medial pseudopores, one setal pore and three or four real pores present on each side of midline; labial palpomere 1 largest, about 1.6 – 1.7 times as long as wide, distance from setulae α to γ about twice the distance from seta b to setula γ, 2 about 1.4 – 1.5 times as long as wide, 3 parallel-sided and about as long as 1, about 3.5 – 4.0 times as long as wide. Mentum ( Figure 6 (f)) trapezoidal, anterior margin emarginate; v-seta short. Thorax. Pronotum ( Figure 7 (b)) subquadrate, approximately 1.1 times as wide as long, widest in apical third; median region with longitudinal impression, pubescence directed posteriorly in midline; hypomera fully visible in lateral aspect. Metanotal scutum with one long seta and four or five short setae on each side of midline. Mesocoxal cavities moderately separated. Mesoventral process slightly pointed at apex, slightly shorter than metaventral process and isthmus combined. Elytra wider than pronotum; elytron approximately 1.7 – 1.8 times as long as wide, postero-lateral margin almost straight; pubescence directed posteriorly and postero-laterally; hind wings fully developed, flabellum composed of about eight setose lobes. Legs. Slender and long, with pubescence and macrosetae; tibiae with two spurs at apex; tarsal formula 4-5-5, length ratio of tarsomeres 30: 33: 33: 72 (protarsus); 41: 45: 40: 37: 72 (mesotarsus); 60: 45: 45: 42: 90 (metatarsus. Abdomen. Parallel-sided; surface glossy and densely pubescent, with transversely imbricate microsculpture; macrochaetal arrangement of tergites II – VI 01-12-12- 13-13; male tergite VII ( Figure 7 (c)) with longitudinal tubercle in postero-median region; VIII with four macrosetae on each side of midline, posterior margin ( Figure 7 (d)) emarginate in median region, with two inner processes and two outer processes blunt at apex; male sternite VIII with seven macrosetae on each side of midline, posterior margin convex, slightly round, with inconspicuous marginal setae; posterior margin of female tergite VIII subtruncate, posterior margin of female sternite VIII broadly round, with long marginal setae, minute setae present in median region. Aedeagus. Median lobe ( Figure 7 (e,f)) narrowly ovate, apical process subparallel-sided, convergent apically in ventral aspect; apical process slightly bent in lateral aspect. Apical lobe of paramerites ( Figure 7 (g)) with four setae; a-seta longest, the other setae short and subequal in length, c- and d-setae positioned apically. Spermatheca. Bursa round, with small umbilicus; duct short and simple, dilated and round apically ( Figure 7 (h)).

Type material

Holotype, ♂, labelled as follows: ‘ KOREA: Gangwon Prov., Pyeongchang-gun, Jinbumyeon, Mt. Odaesan , N 37°44′58.1″ E 128°34′44.9″ 700m, 27 V 2010, TK Kim, flood debris ’ ( CNUIC) . Paratypes, 36 exx. (total): 20 exx., KOREA: Gangwon Prov., Hwacheon-gun Mt Hwaaksan , 30 June to 2 July 1998, HJ Lim, KL You, FIT ( CNUIC); 1 ex ., KOREA: Gangwon Prov . , Hwacheon-gun Mt Hwaaksan , 30 June to 2 July 1998, HJ Lim, KL You, FIT ( CNUIC); 10 exx., KOREA: Gangwon Prov., Hongcheron-gun, Nae-myeon, Gangwon-ri , Sambongnatural recreation forest, 37°51 ʹ 0.1 “ N, 128°27 ʹ 46 “ E, 11 May 2007, KJ Ahn, TK Kim, YH Kim, leaf litter ( CNUIC); 2 exx ., KOREA: Gangwon Prov., Inje-gun, Inje-eup, Mt Jeombongsan , 2 June 2006, SJ Park, YH Kim, near steam ( CNUIC); 3 exx ., KOREA: Gangwon Prov., Pyeongchang-gun, Jinbu-myeon, Dongsan-ri , Mt Odaesan , Sangwonsa , 37°47.074 ʹ N, 128°33.735 ʹ E, 15 May 2006, TK Kim, HW Kim, near stream ( CNUIC) ;

Material examined

SOUTH KOREA: Chungbuk Prov.: 1 ex ., Jincheon-gun, Jincheon-eup, Baekgok-myeon , Mt Manloisan , 30 May 1998, HJ Lim, sifting; 3 exx ., Yeongdong-gun, Sangchon-myeon, Mulhan-ri , Mt Minjujisan , Mulhan-valley , 36°3 ʹ 15 “ N, 127°52 ʹ 31 “ E, 15 June 2006, TK Kim, near stream; 5 exx. (in 95% ETOH) , Yeongdong-gun, Yanggang-myeon, Jichon-ri , 12 April 2007, TK Kim, near stream . Chungnam Prov.: 9 exx., Daejeon-si, Secheon-dong, Secheon-park , 17 August 1999, HJ Kim, near stream; 2 exx ., Daejeon-si, Mt Gyeryongsan, Sutonggol , 26 June 1999, HJ Kim, near stream; 2 exx ., Daejeon-si, Sutonggol , 9 May 1998, KL You, HJ Lim, near stream; 5 exx ., Daejeon-si, Yuseong-gu, Gyesan-dong , Gyeryongsan , Geumsubong , 21 May 2000, SJ Park, near stream; 3 exx ., Geumsan-gun, Mt Daedunsan , 25 May 2001, SJ Park, MJ Jeon, HJ Yun, sifting; 4 exx ., Gongju-si, Banpo-myeon, Sangsinri , Mt Gyeryongsan , 21 May 2000, MS Kim, near stream; 1 ex ., Gongju-si, Mt Gyeryongsan, Sinwonsa , 17 July 2002, C Shin, near stream . Gangwon Prov.: 7 exx., Donghae-si, Samhwa-dong, Samhwasa , 26 May 1984, YS Kim; 2 exx. (in 95% ethanol) , Jeongseongun, Jeongseon-eup, Mt Gariwangsan , 37°25′16″ N, 128°33′23″ E 585 m, 10 July 2009, YG Ban, leaf litter; 4 exx ., Yangyang-gun, Seoraksan, Osaekyaksu , 31 July to 15 September 2001, SJ Park, CW Shin, JS Park, FIT; 5 exx ., Yangyang-gun, Mt Seoraksan, Osaekyaksu , 31 July to 15 September 2002, SJ Park, CW Shin, JS Park, FIT; 3 exx ., Yanggu-gun, Yanggueup, Mt Samyeongsan , 38.07005 N, 127.93498 E, 14 July to 12 August 2003, SJ Park, DH Lee, FIT . Gyeongbuk Prov.: 20 exx., Bonghwa-gun Mt Cheongryangsan , 128°53 ʹ 53 “ N, 36° 46 ʹ 37 “ E, 30 July 2007, KJ Ahn, DH Lee, HW Kim, JH Song, leaf litter; 8 exx ., Cheongsonggun, Budong-myeon, Sangui-ri , Mt Juwangsan , 13 June 2006, SJ Park, YH Kim, near stream; 6 exx ., Cheongsong-gun, Mt Juwangsan , 28 – 29 June 1987, YB Cho; 12 exx ., Cheongsong-gun, Cheongsong-eup, Wolo-ri , Mt Juwangsan , Dalgi-falls , 36°26 ʹ 31.9 “ N, 129°7 ʹ 48.7 “ E, 15 June 2006, TK Kim, under stones near stream; 6 exx ., Cheongsong-gun, Mt Juwangsan , 23 June 1988, GS Jang; 28 exx ., Ulleung-gun, Seo-myeon, Namyang stream, 37°27 ʹ 58.04 “ N, 130°50 ʹ 17.45 “ E, 0 m, 18 September 2001, IS Yoo, JS Lee, near stream . Gyeonggi Prov.: 4 exx., Gapyeong-gun, Buk-myeon, Mt Myeongjisan , 25 July to 30 August 2001, KJ Ahn, SJ Park, CW Shin, FIT; 2 exx ., Namyangju-si, Sundog-myeon, Obang-ri , Mt Chukryeongsan , 13 September 1999, HJ Kim, near stream; 1 ex ., Yangpyeong-gun, Mt Yongmunsan , 3 July 1998, KL You, HJ Lim, FIT . Jeju Prov.: 1 ex . , Jeju-si, Ara-dong, Gwaneumsa , 26 May 2003, SJ Park, near stream; 1 ex . , Jeju-si, Jocheoneup, Goepyeongioreum , 28 May to 27 June 2003, SJ Park, CW shin, FIT; 21 exx., Seogwipo-si, Mt Hallasan, Yeongsil , 17 June 2003, SJ Park, sifting; 9 exx ., Seogwipo-si, Hawon-dong, Seogwipo-natural recreation forest, 33°18 ʹ 54.2 “ N, 126°27 ʹ 56.0 “ E, 735 m, 30 May 2007, KJ Ahn, DH Lee, TK Kim, YH Kim, flood debris; 1 ex ., Seogwipo-si, Hawaondong, Seogwipo natural recreation forest, 33°18′52.24″ N, 126°27′56.04″ E, 730 m, 7 September 2007, TK Kim, under stones near stream . Jeonbuk Prov.: 8 exx., Jeongeup-si, Mt Naejangsan, Naejangsa , Geumseon-valley , 25 June 2000, HJ Kim, near stream; 3 exx ., Muju-gun, Anseong-eup, Chilyeon fall, 6 June 1988, GS Jang; 3 exx. (in 95% ethanol) , Muju-gun, Seolcheon-myeon, Mt Deokyusan , 27 June 2005, JS Park, SI Lee, TK Kim, under stones; 8 exx ., Muju-gun, Seolcheon-myeon, Samgong-ri , Baekryeonsa , 35°52.358 ʹ N, 127° 46.572 ʹ E, 29 June 2006, SI Lee, TK Kim, under stones; 4 exx ., same data as former except for 29 June 2006, KJ Ahn, TK Kim, near stream . Jeonnam Prov.: 3 exx., Damyang-gun, Yong-myeon, Wolgye-ri , Mt Chuwolsan , 7 April 2005, SM Choi, SI Lee, sifting; 1 ex ., Gwangyang-si, Daab-myeon , 25 May 2000, KJ Ahn; 5 exx ., Gwangju-si, Seokgok-dong, Mt Mudeungsan , Pungam-reservoir , 21 April 2006, KJ Ahn, near stream .

Distribution

Korea (South).

Remarks

This species can be distinguished from other Aloconota species by the more convex and subparallel-sided body; the pronotum with longitudinal impression in median region; and the different shape and structure of aedeagus and spermatheca. Most specimens have been collected near stream with other Aloconota species.

Etymology

Named derived from the Latin impressa meaning ‘ impression ’, which is located on dorsal surface of pronotum.

Figures

Figure 1. Habitus (a) Aloconota brunnea sp. nov., 2.3 mm; (b) Aloconota elongata, 4.0 mm; (c) Aloconota hydrosmectoides, 2.7 mm; (d) Aloconota impressa sp. nov., 3.0 mm; (e) Aloconota parviocularis sp. nov., 2.5 mm; (f) Aloconota sulcifrons, 4.5 mm; (g) Aloconota tuberculata sp. nov., 2.8 mm.

Figure 6. Mouthparts of Aloconota impressa sp. nov. (a) Labrum (dorsal aspect); (b) epipharynx (ventral aspect); (c) right mandible (dorsal aspect); (d) left mandible (ventral aspect); (e) left maxilla (ventral aspect); (f), labium (ventral aspect).

Figure 7. Aloconota impressa sp. nov. (a) Antenna; (b) pronotum; (c) male abdominal tergite VII (dorsal aspect); (d) male abdominal tergite VIII (dorsal aspect); (e) median lobe of aedeagus (lateral aspect); (f) median lobe of aedeagus (ventral aspect); (g) paramere (lateral aspect); (h) spermatheca. Scales = 0.1 mm.