Caenoscelis sibirica Reitter, 1889

Shin, Joong-In, Park, Sun-Jae, Lee, Seung-Gyu & Park, Jong-Seok, 2023, Taxonomic Review of the Genus Caenoscelis C. G. Thomson (Coleoptera: Cryptophagidae: Cryptophaginae) in Korea with Description of a New Species, The Coleopterists Bulletin 77 (3), pp. 469-476 : 475

Caenoscelis sibirica Reitter, 1889 ( Figs. 1C , 2C , 3C , 4B , 5C )

Caenoscelis sibirica Reitter 1889: 309 .

Caenoscelis fleischeri Reitter 1889: 309 .

Caenoscelis grandis C. G. Thomson 1892: 1773 .

Material Examined (n = 11, 6♂♂ 5♀♀). 2♂♂ 2♀♀ (2♂♂ card mounted, genitalia and abdomen dissected and mounted on plastic card, 2♀♀ point mounted, CBNUIC), Korea: Gyeonggi Prov. Yongchu-ro, Gapyeong-eup, Gapyeong-gun , 15.IV.2019, 37°51′29.5′′N 127°28′01.0′′E, 193 m, sifting moss & leaf litter near stream, J.-S. Park, J.-W. Kang, J.-Y. Kang, Y.-J. Choi; 1♂ (card mounted, genitalia and abdomen dissected and mounted on plastic card, CBNUIC), Korea: Chungbuk Prov. 302-52, Mongnyeon-ro, Sangdang-gu, Cheongju-si , 09.IV.2021, 36°36′30.8′′N 127°32′15.8′′E, 177 m, sifting soil & leaf litter, J.-W. Seo; 1♂ (card mounted, genitalia and abdomen dissected and mounted on plastic card, CBNUIC), Korea: Chungbuk Prov. Gaesin-dong, Heungdeok-gu, Cheongju-si , 13.X.2022, 36°37′36.3′′N 127°27′22.2′′E, 70 m, sifting soil & leaf litter, J.-I. Shin; 2♂♂ 3♀♀ (1♂ card mounted, genitalia and abdomen dissected and mounted on plastic card, 1♂ slide mounted, 3♀♀ point mounted, CBNUIC), Korea: Gangwon Prov. Yongdae-ri, Buk-myeon, Inje-gun , 13. V.2021, 38°14′26.3′′N 128°23′51.2′′E, 552 m, J.-S. Oh.

Diagnosis. Adult males of this species can be distinguished from other Palearctic Caenoscelis species by the following combination of characters: head densely punctured, dorsal punctures separated by less than their diameter ( Fig. 4B ); antennomere I about 1.5 times as long as wide, clearly shorter than 2.0 times as long as wide ( Fig. 2C ); antennomere II symmetrical ( Fig. 2C ); antennomere X transverse, slightly wider than IX ( Fig. 2C ); hind wings well developed; parameres trapezoidal, not elongate, distally punctured, pair of long apical setae present ( Fig. 5C ); lateral lobes folded near apex, scarcely punctured ( Fig. 5C ).

Distribution. Europe; Japan, Mongolia, Russian Far East, Korea: Chungbuk Prov., Gyeonggi Prov., Gangwon Prov. ( Fig. 6 ).

Comments. This species was first recorded in North Korea by Lyubarsky (1991). The description and illustrations of detailed characters of this species were provided in Otero (2013: 37–39).

Habitat. This species was collected by sifting soil, leaf litter, and moss in mixed forests.

Figures

Fig. 1. Male habitus, dorsal. A) Caenoscelis koreanus, new species, B) C. ferruginea, C) C. sibirica. Scale bars = 1.0 mm.

Fig. 2. Male left antenna, dorsal. A) Caenoscelis koreanus, new species, B) C. ferruginea, C) C. sibirica. Arrow, antennomere X. Scale bars = 0.5 mm.

Fig. 3. Pronotum, dorsal.A) Caenoscelis koreanus, new species, B) C. ferruginea, C) C. sibirica. Scale bars = 0.5 mm.

Fig. 4. Head, dorsal. A) Caenoscelis ferruginea, B) C. sibirica. Scale bars = 0.2 mm.

Fig. 5. Distipenis and parameres, dorsal. A) Caenoscelis koreanus, new species, B) C. ferruginea, C) C. sibirica. AS, apical seta; IA, internal apodeme; IB, inner border; LL, lateral lobe; PA, paramere. Arrow, internal sclerites. Scale bars = 0.2 mm.

Fig. 6. Collection localities in Korea. Triangle, Caenoscelis koreanus, new species; square, C. sibirica; circle, C. ferruginea.