Thinodromus (Amisammus) japonicus
Creators: name: Lee, Seung-Il
name: Ahn, Kee-Jeong
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Thinodromus
Thinodromus japonicus

description: Thinodromus (Amisammus) japonicus (Cameron, 1930)   
(Figs. 4, 8, 15, 16, 20, 24, 28, 32, 36, 40, 44)  
 Trogophloeus (Carpelimus) japonicus Cameron, 1930: 183; Scheerpeltz, 1933: 1082.   
 Carpelimus (Carpelimus) japonicus: Adachi, 1957: 6; Shibata, 1976: 148; Watanabe, 1998: 313.   
 Carpelimus japonicus: Herman, 1970: 392.   
 Thinodromus japonicus: Watanabe, 1985: 273.   
 Thinodromus (Amisammus) japonicus: Gildenkov, 2000b: 1075; 2001: 123; Smetana, 2004: 534.   
 Description. Body length 3.3–4.0 mm. Body glossy. Color usually dark brown, legs pale brown (Fig. 4).   
 Head: Slightly longer than wide. Eyes moderately large and convex, occupying two-thirds of lateral side of head. Temples moderately developed. Mandible blunt, three subapical teeth present. Median sclerotized plate of hologlossa (Fig. 8) diamond, 1.7 times longer than wide. In male antenna slightly longer than female. Male antenna (Fig. 15): scape robust, about 2.6 times longer than wide; pedicel about 2.3 times longer than wide, shorter and narrower than scape; antennomere 3 slender, slightly dilated apically, about 1.8 times longer than wide; 4–6 about 1.4 times longer than wide; 7 about 1.3 times longer than wide; 8–9 as long as wide; 10 about 1.1 times wider than long. Female antenna (Fig. 26): scape about 2.4 times longer than wide; pedicel about 1.6 times longer than wide; antennomere 3 about 1.6 times longer than wide; 6–7 about 1.2 times longer than wide; 8–9 about 1.1 times wider than long; 10 about 1.3 times wider than long.   
 Thorax: Pronotum (Fig. 20) wider than long, widest at anterior third, narrowest at base, pubescence arrange toward head. Intervals between punctures as long as puncture diameter, punctures large and deep. Upper side of procoxal cavity pointed. Scutellar impression (Fig. 24) 1.9 times wider than long, shaped as semicircular, with several long pubescence. Elytra wider than pronotum.   
 Abdomen: Male sternite VIII (Fig. 28) wider than long and more or less emarginated apically. Posterior margin of female sternite VIII (Fig. 32) broadly round.   
Aedeagus (Figs. 36 & 40) oval, parameres broad, wrapping one third of median lobe.  
Spermatheca (Fig. 44) in the middle curved about 180 degrees.  
 Type material. Holotype, male, labeled as follows: ‘ Holotypus Trogophloeus japonicus Cameron, Type, JAPAN Kobe 10. IV. 30. Stream retire, M. Cameron. Bequest. B. M. 1955–147., T. Japonicus Cam. TYPE, Thinodromus japonicus (Cam.) 2000 det. M. Gildenkov’ (Deposited in The Natural History Museum, London).   
 Additional materials (total 141 specimens). KOREA: Jeju Prov.: 26 ex., Seongpanak, Jocheon-eup, Bukjeju-gun, 27 VI 2003, M.-J. Jeon, ex under leaf litters (2 males, on slide); 27 ex., Goipyeongioreum, Namjeju-gun, 28 V 2003, S.-J. Park, C.-W. Shin and M.-J. Jeon, sifting; 4 ex., same data as former except for 28 V – 27 VI 2003, Y.B. Cho, S.-J. Park and C.-W. Shin, FIT; 3 ex., Goipyeongioreum, Gyorae-ri, Jocheoneup, Bukjeju-gun, 13 VI 2005, S.-J. Park & S.-I. Lee, sifting; 1 ex., same data as former except for 30 V – 17 VI 2003, Y.B. Cho, FIT; 4 ex., same data as former except for 28 V 2003, Y.B. Cho; 4 ex., Yeongsil, Mt. Hallasan, Seogwipo City, 17 VI 2003, S.-J. Park, sifting; 17 ex., same data as former except for Y.B. Cho; 7 ex., same data as former except for 24 VII 2003; 18 ex., same data as former except for 23 V 2006, T.-K. Kim & H.-W. Kim, ex leaf litters near stream (2 males and 1 female, on slide); 3 ex., same data as former except for 27 X 1985, K.S. Lee, ex leaf litters; 2 ex., Bomok-ri, Seogwipo City, 20 III 1986, ex under seaweeds; 15 ex., near 1100m Rest Area, 28 V 2003, Y.B. Cho, sifting (1 female, on slide); 1 ex., Muljangoreum, 23 V 1998, Y.B. Cho; 2 ex., Girinsaseum, 28 IX 1984, K.S. Lee; 6 ex., Dongsuak, Namwon-eup, Namjeju-gun, 30 VIII 1997, Y.B. Cho.   
 Distribution. Korea (Jeju Island) and Japan.   
 Remarks. This species can be easily distinguished from other Korean Thinodromus by the dark brown coloration, long pubescence along the entire body, and semicircular scutellar impression. They are collected only in Jeju Island in Korea.
description: Published as part of Lee, Seung-Il & Ahn, Kee-Jeong, 2007, The Korean species of the genus Thinodromus Kraatz (Coleoptera: Staphylinidae: Oxytelinae), pp. 39-50 in Zootaxa 1573 (1) on pages 48-49, DOI: 10.11646/zootaxa.1573.1.2, http://zenodo.org/record/5096689