Acontosceles siwalikensis Pütz, 2008

Yoshitomi, Hiroyuki, 2019, Review of the Asian Thaumastodinae (Coleoptera, Byrrhoidea, Limnichidae), with a phylogeny of the genera, European Journal of Taxonomy 583, pp. 1-45 : 11-12

Acontosceles siwalikensis Pütz, 2008

Figs 5E , 7

Acontosceles siwalikensis Pütz, 2008: 314 .

Material examined

NEPAL • 1 ♂, 5 ex.; “NEPAL, Prov. Bheri Distr. Surkhet, 20km S Surkhet, Bheri-River 600m NN, 03. VI. 1995 leg. M. Hartmann ”; NME • 1 ♂, 1 ♀; same collection data as for preceding; EUMJ .

Redescription

For a detailed description of the external features, see the original description ( Pütz 2008). PW/ PL 2.63; EL/ EW 1.58; EL/ PL 4.70; EW/ PW 1.13; TL/ EW 1.92.

Male

Sternite VII ( Fig. 7A ) gently arcuate on caudal margin, bearing about 30 long setae in median part. Sternite VIII ( Fig. 7B ) membranous. Sternite IX ( Fig. 7C ) slightly sclerotized, with long apical plates bifid in apical parts. Aedeagus ( Fig. 7 D–F) relatively short, well sclerotized, slightly curved ventrally; basal piece oblong, subparallel-sided; lateral lobes short and broad, arcuate on lateral margins, closely punctuate, with small projections in lateral parts of apices; median lobe slender, about 0.8 times as long as lateral lobe, slightly curved ventrally; ML/ BL 0.40; ML/ LL 0.80.

Female

Sexual dimorphism slight. Sternite VII ( Fig. 7G ) arcuate on caudal margin, bearing about 40 long setae. Urosternite ( Fig. 7H ) well sclerotized, with long and slender apodeme; lateral projections short, projecting antero-laterally. Ovipositor ( Fig. 7I ) well sclerotized; coxite closely punctuate, pointed at apices; approximate ratio of coxite and baculus (n = 1) 1.0: 1.8.

Measurements

Male (n = 1): TL 2.28 mm; PW 1.05 mm; PL 0.40 mm; EL 1.88 mm; EW 1.19 mm.

Distribution

Nepal.

Figures

Fig. 5. Acontosceles spp. A. A. borneensis sp. nov., holotype (BPBM). B. A. yorioi Satô, 1966 (EUMJ). C. A. hydroporoides Champion, 1924 (NME). D. A. chujoi Yoshitomi & Satô, 2005 (EUMJ). E. A. siwalikensis Pütz, 2008 (NME). F. A. zetteli Pütz, 2008 (BPBM). Scale bars: 1.0 mm.

Fig. 7. Acontosceles siwalikensis Pütz, 2008, male (A–F) and female (G–I) genitalia (NME). A, G. Sternite VII. B. Sternite VIII. C. Sternite IX. D. Aedeagus, dorsal view. E. Aedeagus, ventral view. F. Aedeagus, left lateral view. H. Urosternite. I. Ovipositor.