Achenomorphus yakushimanus ITO, 1992: 61
Panscopaeus yakushimanus : HERMAN (2003)
A revision of Panscopaeus (Coleoptera: Staphylinidae: Paederinae)
Assing, Volker
Beiträge Zur Entomologie = Contributions to Entomology
2011
2011-11-10
61
2
389
411
4CGPB
(ITO, 1992)
ITO
1992
[265,706,1314,1338]
Insecta
Staphylinidae
Panscopaeus
Animalia
Coleoptera
8
397
Arthropoda
species
yakushimanus
Achenomorphus yakushimanus ITO, 1992: 61ff. Panscopaeus yakushimanus: HERMAN (2003).
Comment: The original description is based on a male holotypeand five paratypesfrom "Miyanoura, Yakushima Is., Kagoshima Pref." ( ITO 1992). A request of a loan of type material addressed to the author of the species remained unanswered. However, the above material is in good agreement with details specified in the original description and with the illustrations provided by ITO (1992). Additional material examined:
China: Zhejiang: 9 exs., Moganshan, 26.IV.1993, leg. Rougemont(cRou); 9 exs., Tienmushan, 29.IV.1993, leg. Rougemont(cRou, cAss); 4 exs., same data, but 2.IX.1994(cRou); 1 ex., Hangzhou, 22.IV.1993, leg. Rougemont(cAss); 4 exs., Tianmu Shan, pass 25 kmNNW Linan, 30°26'N, 119°36'E, 620-820 m, creek valley with bamboo and mixed forest, litter sifted, 16.VI.2007, leg. Schülke(cSch, cAss); 10 exs., Hangzhou Pref., Tianmu Shan, S pass 41 kmWNW Linan, 30°22'N; 119°19'E, 350 m, plant refuse near creek, 17.VI.2007, leg. Schülke(cSch); 6 exs., Hangzhou Pref., Tianmu Shan, 40 kmWNW Linan, 30°21'N; 119°19'E, 300 m, reservoir, plant refuse, 17.VI.2007, leg. Schülke& Pütz(cSch, cPüt); 2 exs., Tianmu Shan, pass 81 kmW Linan, 30°18'N, 118°53'E, 625 m, plant refuse and litter sifted, 19.VI.2007, leg. Schülke& Pütz(cPüt, cAss). Sichuan: 16 exs., Qingcheng Shan, NW Chengdu, 30°54'N; 103°32'E, 650- 700 m, 3.-4.VI.1997, leg. Schülke& Wrase(cRou, cSch, cAss); 2 exs., same data, but 18.V.1997, leg. Wrase(cSch); 10 exs., Quingcheng Shan, 65 kmNW Chengdu, 8 kmW Taiping, 30°53'N, 103°33'E, 800-1000 m, 18.V./ 3.-4.VI.1997, leg. Pütz(cPüt, cAss); 2 exs., Qingcheng Shan, 56 kmNW Chengdu, 30°54'N, 103°33'E, 975 m, 18.VI.1999, leg. Schülke& Wrase(cSch). Fujian: 1 ♂, Xinqiao, 27.05°N, 117.1°E, 10.V.2005, leg. Turna( NHMW). Taiwan: 8 exs., Hsinchu County, Hsinkuangenv., Road No.60, km 44, Jienshih township, 1600 m, litter sifted, 25.III.2008, leg. Vít( MHNG, cAss); 2 exs., Hsinchu County, Wufeng, Road122, km 19, 1200 m, mountain forest litter, 26.III.2008, leg. Vít(cAss); 2 exs., Hsinchu County, S-Hengshan, Hengshan township, road 35, 600 m, roadside, forest litter sifted, 27.III.2008, leg. Vít( MHNG); 2 exs., Chiayi County, Alishan, road 129, 4.5 kmS Lungmei, 2000 m, Cryptomeriastump, 12.IV.2009, leg. Vít(cAss).
Redescription: Body length 4.0- 4.6 mm. Habitus as in Fig. 22. Coloration: head brown to dark-brown; pronotum reddish to dark-brown, usually only slightly paler than head; elytra reddish to reddish-brown; abdomen reddish-brown to dark-brown, with the posterior margins (and often also the lateral and anterior margins) reddish; legs and antennae reddish. Head approximately 1.15 times as wide as long (Fig. 23); posterior margin distinctly concave; postocular region usually weakly convex in dorsal view; posterior angles marked; neck slender, approximately 0.15 times the width of head in dorsal view; punctation of dorsal surface very fine and dense, barely noticeable in the pronounced microreticulation; dorsal surface almost matt. Eyes large and bulging, approximately as long as postocular region in dorsal view, occasionally slightly longer or slightly shorter. Antennae as in Fig. 24. Pronotum approximately as wide as long and 0.90-0.95 times as wide as head, widest at anterior angles, anteriorly obliquely tapering towards neck (Fig. 23); punctation and microreticulation similar to those of head; midline sometimes weakly and narrowly elevated and/or somewhat more shiny in the middle. Elytra approximately as long as, or slightly shorter than pronotum, and approximately 1.15 times as broad as pronotum (Fig. 23); punctation fine and dense; microsculpture shallow, much less pronounced than that of head and pronotum. Hind wings present. Metatarsomere I almost 1.5 times as long as II. Abdomen slightly narrower than elytra; punctation very fine and dense; interstices with shallow microsculpture visible only at higher magnification; posterior margin of tergite VII with palisade fringe. ♂: sternite VII unmodified; sternite VIII with moderately deep excision posteriorly (Fig. 25); aedeagus usually 0.54-0.56 mmlong, with apically distinctly bifid ventral process (Figs 26-27, 29). Map 1:Distribution of Panscopaeusspeciesin Taiwan: filled circles: P. yakushimanus;open circle: P. formosanus. Comparative notes: This species is distinguished from the similar P. lithocharoidesby the paler coloration ( P. lithocharoides: head and abdomen usually blackish-brown to blackish; pronotum and elytra brown to dark-brown), on average shorter elytra, the much deeper posterior excision of the male sternite VIII ( P. lithocharoides: posterior margin of sternite VII only weakly concave), as well as by the broader, shorter (ventral view), and apically less strongly curved (lateral view) ventral process of the aedeagus.
Distribution and natural history: Previously, P. yakushimanuswas known only from Yakushima, Ryuku Islands, southern Japan. The known distribution now also includes western Chinaand Taiwan( Map 1), where the specimens were sifted from leaf litter, plant refuse, and dead wood at a wide range of altitudes ( 300-2000 m). The aedeagus of one of the males from Hsinchu county, Taiwan, is teratologically malformed and much smaller ( 0.35 mmlong) than usual (Fig. 28), a phenomenon which has repeatedly been observed also in other paederine genera such as MedonSTEPHENS, 1833and SuniusSTEPHENS, 1829(( ASSING 2006). The aedeagus of another male from Hsinchu countyis slightly smaller ( 0.50 mm).
[107,787,211,233]
1993-04-26
Rougemont
China
Moganshan
9
398
9
Zhejiang
1993-04-29
Rougemont
China
Tienmushan
9
398
9
Zhejiang
[391,768,240,262]
1994-09-02
Rougemont
China
Tienmushan
9
398
4
Zhejiang
1993-04-22
Rougemont
China
Hangzhou
9
398
1
Zhejiang
2007-06-16
Schulke
China
720
30.433332
Tianmu Shan
1222
119.6
9
398
4
Zhejiang
2007-06-17
Schulke
China
350
30.366667
Tianmu Shan
1222
119.316666
Hangzhou Pref.
9
398
10
Zhejiang
2007-06-17
Schulke & Putz
China
300
30.35
Tianmu Shan
1222
119.316666
Hangzhou Pref.
9
398
6
Zhejiang
2007-06-19
Schulke & Putz
China
625
30.3
Tianmu Shan
1222
118.88333
9
398
2
Zhejiang
1997-06-03
1997-06-04
1997-06-03
Schulke & Wrase
China
675
30.9
Chengdu
1219
103.53333
Qingcheng Shan
9
398
16
Sichuan
1997-05-18
1997-06-04
1997-06-03
Wrase
China
675
30.9
Chengdu
1219
103.53333
Qingcheng Shan
9
398
2
Sichuan
1997-06-03
1997-06-04
1997-06-03
Putz
China
900
30.883333
Taiping
1219
103.55
Quingcheng Shan
9
398
10
Sichuan
1999-06-18
Schulke & Wrase
China
975
30.9
Qingcheng Shan
1219
103.55
9
398
2
Sichuan
2005-05-10
NHMW
Turna
China
27.05
Xinqiao
4978
117.1
9
398
1
1
Fujian
2008-03-25
MHNG
Road No. & Vit
Taiwan
1600
Jienshih township
Hsinkuang
9
398
8
Hsinchu
2008-03-26
Vit
Taiwan
1200
Road
Wufeng
9
398
2
Hsinchu
2008-03-27
MHNG
Vit
Taiwan
35600
Hengshan township
9
398
2
Hsinchu
2009-04-12
Vit
Taiwan
2000
Alishan
9
398
2
Chiayi