Aloconota tuberculata 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 : 1551-1554

Aloconota tuberculata Lee and Ahn sp. nov.

( Figure 1 (g), 10(a – f), 11(a – h))

Description

Length 2.4 – 3.0 mm. Body ( Figure 1 (g)) surface slightly glossy and densely pubescent, with microsculpture. Body reddish brown to dark brown; head and abdomen slightly darker than antennae, pronotum and elytra; legs slightly paler than other parts. Head. Slightly elongate, approximately 1.1 times as long as wide, widest across eyes, slightly narrower than pronotum; eyes moderate in size and prominent, about 1.0 – 1.2 times as long as temples; gular sutures moderately separated, more or less diverged basally; infraorbital carina absent; cervical carina complete. Antennae ( Figure 11 (a)) long and slender; antennomeres 1 – 3 elongate, 1 longest, 2 slightly longer than 3, 4 – 6 about as long as wide, 7 – 10 slightly transverse, 11 longer than wide, about as long as preceding two combined. Mouthparts. Labrum ( Figure 10 (a)) transverse, emarginate in anterior margin, with Ε- sensillum and eight macrosetae on each side of midline; epipharynx ( Figure 10 (b)) with several sensilla, including two lateral sensory rows on each side of midline; β- and γ- sensilla very short. Mandibles ( Figure 10 (c,d)) about 1.7 times as long as basal width; right one with small internal tooth, internal margin serrulate; prostheca distinctly composed of three portions. Galea and lacinia of maxilla ( Figure 10 (e)) long and slender; lacinia composed of nine spines in distal comb region, isolated spines absent; maxillary palpomere 1 smallest, 2 about 2.7 – 2.8 times as long as wide, 3 slightly longer than 2, about 2.5 – 2.7 times as long as wide, 4 digitiform, filamentous sensilla not reaching to basal half. Prementum ( Figure 10 (f)) with two basal pores widely separated, about 5.0 times width of basal pore; medial pseudopores, one setal pore and three real pores present on each side of midline; labial palpomere 1 largest, about 1.5 – 1.7 times as long as wide, with γ- setula located between α- setula and b-seta, distance from setulae α to γ almost twice distance from seta b to setula γ, 2 shortest, about 1.6 – 1.8 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 10 (f)) trapezoidal, anterior margin emarginate; v-seta relatively long. Thorax. Pronotum ( Figure 11 (b)) subquadrate, approximately 1.1 – 1.2 times as wide as long, widest in apical third; pubescence directed anteriorly in midline; hypomera fully visible in lateral aspect. Metanotal scutum with one long seta and about three to five short setae on each side of midline. Mesocoxal cavities narrowly separated, mesoventral process distinctly pointed at apex, shorter than isthmus and metaventral process combined. Elytra slightly longer and wider than pronotum; elytron approximately 1.7 times as long as wide, pubescence directed posteriorly and postero-laterally; postero-lateral margin almost straight; hind wings fully developed, flabellum composed of about seven 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 25: 29: 31: 69 (protarsus); 31: 34: 36: 32: 63 (mesotarsus); 57: 47: 44: 43: 72 (metatarsus) (mm, × 400). Abdomen. Parallel-sided; surface glossy and densely pubescent, with transversely imbricate microsculpture; macrochaetal arrangement of tergites II – VI 01-21-21-21-23; male tergite VII ( Figure 11 (c)) with longitudinal tubercles in postero-median region, VIII with four macrosetae on each side of midline, posterior margin ( Figure 11 (d)) with two blunt inner processes and two outer processes slightly pointed at apex; male sternite VIII with seven macrosetae on each side of midline, posterior margin subtriangularly convex, with long marginal in median region; posterior margin of female tergite VIII subtriangularly convex, posterior margin of female sternite VIII convex, slightly round, with conspicuous and long marginal setae, minute setae present in median region. Aedeagus. Median lobe ( Figure 11 (e,f)) narrowly ovate, apical process slightly constricted basally, narrow and convergent apically in ventral aspect; apical process slightly sinuate in lateral aspect. Apical lobe of paramerites ( Figure 11 (g)) with four setae; a-seta longest, the other setae short and subequal in length, c- and d-setae positioned apically. Spermatheca. S-shaped; bursa very large, with large and conical-shaped umbilicus; duct short and thick ( Figure 11 (h)).

Distribution

Korea (South).

Type material

Holotype, ♂, labelled as follows: ‘ KOREA: Gyeongbuk Prov., Cheongsong-gun, Cheongsong-eup, Wolo-ri , Mt. Juwangsan , Dalgi falls , N 36°26 ʹ 31.9 “ E 129°7 ʹ 48.7 “, 15 VI 2006, TK Kim, ex near stream under stones ’ ( CNUIC) . Paratypes, 7 exx. (total): 3 exx., same data as holotype ( CNUIC); 2 exx . ‘ KOREA: Gangwon Prov.: Pyeongchang-gun, Jinbumyeon, Dongsan-ri, Mt . Odaesan, Sangwonsa , N 37°47.074 ʹ E 128°33.735 ʹ, 15 V 2006, T .- K. Kim, H.-W. Kim , ex near stream ( CNUIC); 1 ex ., same data as former except for ‘ sifting, leaf litter ’; 1 ex ., same data as former except for ‘ H .-W. Kim ’ ( CNUIC) .

Material examined

SOUTH KOREA: Gangwon Prov.: 1 ex ., Hongcheon-gun, Naechon-myeon, Mt Baekamsan , Garyeong-fall , 24 May 2002, KJ Ahn, JS Park, sifting; 1 ex ., Pyeongchang-gun, Bangnimmyeon, Mt Baekdeoksan , 13 July 2001, SJ Park, near stream; 2 exx (one in 95% ethanol) ., Pyeongchang-gun, Jinbu-myeon, Mt Odaesan , Sangwonsa , 18 May 2002, SJ Park, CW Shin, sifting; 1 ex . (in 95% ethanol), same data as former except for ‘ N 37°47′8.6″E 128°33′ 56.2″, 16 iv 2008, KJ Ahn, YH Kim, flood debris ’.

Remarks

This species is similar to A. parviocularis sp. nov., but can be distinguished by the characters provided in the key and different shape and structure of the aedeagus and spermatheca.

Etymology

Named derived from the Latin tuberculata meaning ‘ tubercle ’, which is located on male abdominal tergite VII.

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 10. Mouthparts of Aloconota tuberculata 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 11. Aloconota tuberculata 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.