Scaphisoma limbatum Erichson, 1845

Kim, Ye-Jun & Ahn, Kee-Jeong, 2023, Descriptions of Two New Species of Scaphisoma Leach (Coleoptera: Staphylinidae: Scaphidiinae) in Korea, The Coleopterists Bulletin 77 (4), pp. 537-541 : 540-541

Scaphisoma limbatum Erichson, 1845 ( Figs. 3 , 10 )

Diagonosis. Body length 2.3–2.4 mm (head to apical end of elytra), width 1.6–1.7 mm (elytra margin), body convex and glossy. Head, pronotum, and elytra black; mouthparts, antennae, and tarsi reddish brown; remainder of legs yellowish brown. Head with fine, sparse punctures. Maxillary palpomere 3 triangularly enlarged and flattened; relative ratio of antennomeres 3 to 11 (4:5:7:13:15:11:13:14:17), antennomeres 7–11 expanded; antennomere 5 very short, shorter than 3 and 4 combined ( Fig. 10 ). Pronotum finely, densely punctate, about 1.7 times as wide as long. Elytra distinctly, densely punctate, punctation denser than that of pronotum. Protibia, mesotibia, and metatibia straight. Submesocoxal area narrow, 0.06 mm. Metaventrite with fine punctures at middle, coarsely punctate in lateral area; submetacoxal area narrow, 0.07 mm long, gradually widened lateral of median margin, as long as one-fifth length of abdominal sternite III. Metacoxal sutural area very narrow. Abdominal sternite III finely, densely punctate.

Distribution. Korea, Austria, Bosnia, China, Croatia, Germany, Hungary, Italy, Poland, Romania, Russia (Europe, Far East), Serbia, Slovakia, Slovenia, and Ukraine. New record for Korea.

Specimens Examined. 1 ex., KOREA, Gangwon Prov., Pyeongchang-gun, Jinbu-myeon, Dongsan-ri , Mt. Odaesan , Sangwonsa , 15 IX 2001, S.-J. Park, ex mushroom ; 1 ex., Mt. Odaesan, Sangwonsa , N37°47′10′′ E128°33′57′′, 12 X 2007, Y.-H. Kim, ex fungus on logs .

Remarks. This species is similar to Scaphisoma subalpinum Reitter in body size and blackish body coloration but can be distinguished by the triangular maxillary palpomere 3. Also, Scaphisoma seorsum (Löbl) is similar to this species in body size, antennomere ratio, and by possessing a triangular maxillary palpomere 3, but can be distinguished by the difference in punctation patterns of the metaventrite, with fine punctures in the middle and coarse punctures in the lateral area.

Figures

Figs. 1–3. Habitus, left in dorsal view and right in lateral view. 1) Scaphisoma koreanum, new species, 2.0 mm;

Figs. 4–10. Male genitalia (4–7) and antennomeres 3–11 (8–10). Scaphisoma koreanum, new species: 4) Dorsal view (left) and lateral view (right); 5) Paramere, ventral view; 6) Internal sac, dorsal view (left) and lateral view (right). 7) S. sambangsanense, new species, dorsal view (left) and lateral view (right). 8) S. koreanum, new species; 9) S. sambangsanense, new species; 10) S. limbatum. Scale bars = 0.1 mm.