Stenoloba rufosagittoides Han & Kononenko, 2009

Han, H. L. & Kononenko, V. S., 2009, A review of the genus Stenoloba Staudinger, 1892 from China, with description of 6 new species and 7 new records for China (Lepidoptera: Noctuidae, Bryophilinae), Zootaxa 2268 (1), pp. 1-22 : 17

Stenoloba rufosagittoides Han & Kononenko sp. n.

( Figs. 14 , 31 )

Type material. Holotype: male, Prov. Sichuan, Mt. Emei, Wannian temple, 14.vi.1979 (collector unknown). The holotype is preserved in the collection of Institute of Zoology Chinese Academy of Sciences, Beijing.

Diagnosis. Externally similar to S. rufosagitta , but differs from the former by more slender habitus, shape of forewing with oblique outer margin and more unicolorous pattern of forewing. Most significant differences are in the male genitalia, particularly in the structure of the tegumen and vinculum, the presence of peniculus, shape of valva and structure of vesica.

Description. Adult ( Fig. 14 ). Wingspan 22 mm. Head and thorax blackish-grey with light olive tint, collar marked with pale rufous. Abdomen dark-grey, dorsal crest absent. Forewing relatively short, with almost parallel dorsal and ventral margins; costa arched in basal part; apex rounded, outer margin of wing oblique. Ground colour of forewing blackish-grey, wing maculation represented by dark diffused lines; basal line distinct, with pale border and blackish scales; antemedial line dark, indistinct; medial field somewhat darker; postmedial line dark, diffused, more distinct in costal area; orbicular and reniform spots dark, diffused; subterminal line not expressed, cilia dark-brown. Inner margin with broad pale-rufous stripe, running from base of wing to postmedial line; torrnal patch pale-rufous, bordered with white scales inside and with black scales outside. Hindwing dark-brown, discal spot hardly traceable.

Male genitalia ( Fig. 31 ). Uncus rudimental, short and narrow; tegumen high, 2 times higher than vinculum; vinculum short, with large lateral extensions (peniculus); juxta broad and rounded at base, extended apically. Valva asymmetrical: -left valva with long, thin extension of sacculus. Valva short, rather massive, triangular in shape, very wide at base, strongly tapered apically, with hooked apical extension; sacculus narrow, but long, clasper as long plate directed parallel to ventral margin of valva; costa short, with short extension bearing short bristles. Aedeagus relatively long and thin; vesica tubular, everted ventrally, broadened in mid part, with two small diverticula in basal and middle parts and with sclerotized bar in apical part; cornuti absent. Female unknown.

Etymology. The species name “ rufosagittoides ” is due to its external similarity to Stenoloba rufosagitta .

Distribution. The species is known only from its type-locality, Prov. Sichuan, South West China.

Figures

FIGURES 9–17. Stenoloba spp., adults. 9. S. brunneola, male; 10. S. brunneola, male, holotype (ZFMK); 11. S. viridimicta; 12. S. lichenosella, male; 13. S. glauca, male; 14. S. rufosagittoides, male, holotype; 15. S. rufosagitta; 16. S. viridescens, male; 17. S. acutivalva, male, holotype.

FIGURES 30–34. Stenoloba spp., male genitalia. 30. S. glauca, genit. prep. HHL-1233-1; 31. S. rufisagittoides, holotype, genit. prep. ASZ-163-1; 32. S. rufosagitta, genit. prep. ASZ-158-1; 33. S. viridescens, genit prep. HHL-1241- 1; 34. S. acutivalva, holotype, genit. prep. HHL-1244-1.