RESTORATION OF THE GENUS GURNA SWINHOE , 1892 ( LEPIDOPTERA , EREBIDAE , ARCTIINAE )

Citation: Volynkin, A.V. (2016). Restoration of the genus Gurna Swinhoe, 1892 (Lepidoptera, Erebidae, Arctiinae). Biological Bulletin of Bogdan Chmelnitskiy Melitopol State Pedagogical University, 6 (3), 290–294. Поступило в редакцию / Submitted: 23.10.2016 Принято к публикации / Accepted: 28.11.2016 http://dx.doi.org/10.15421/201697 © Volynkin, 2016 Users are permitted to copy, use, distribute, transmit, and display the work publicly and to make and distribute derivative works, in any digital medium for any responsible purpose, subject to proper attribution of authorship.


INTRODUCTION
The genus Gurna Swinhoe, 1892 belongs to the subtribe Nudariina of the tribe Lithosiini (family Erebidae, subfamily Arctiinae), to the 'Miltochrista-Asura generic complex'.It was erected by Swinhoe (1892) for the species Dysauxes indica Moore, 1879 described from West India, synonymised with Miltochrita Hübner, [1819] by Hampson (1900), and long time treated as a member of the genus Miltochrista (Strand, 1922;Singh & al., 2014).Holloway (2001) has assumed that Gurna, as well as some other synonyms of Miltochrista can represent a distinct genus, and following Holloway, Gurna was recently mentioned as a distinct genus by Volynkin (2016), but its status was not revise.
Examination of specimens of the type species of the genus, G. indica including the type confirmed a distinct status of the genus.Its redescription and diagnosis are given below.

MATERIAL AND METHODS
The paper is based on the materials of collections of the Natural History Museum, London (formerly British Museum of Natural History, NHM, London, Great Britain) and Anton Volynkin (CAV, Barnaul, Russia).The genitalia were dissected and mounted in euparal on glass slides.Photos of imago where taken using the camera Nikon D3100/AF-S Nikkor, 18-55 mm.Photos of the genitalia where taken by same camera attached to a microscope with an LM-scope adapter, and further processed by Adobe Photoshop CS4® software.

RESULTS
Gurna Swinhoe, 1892, stat.rev.Diagnosis.The genus is probably monobasic.Wing venation is typical for the Miltochrista lineage and very close to that of the genus Miltochrista, but the stalk R3-R5 originats very close to the upper angle of the cell, and M2 originats from the lower angle of the cell; in addition, the male forewing costa is not curved (Fig. 2).In the male clasping apparatus (Fig. 9), distal extensions of costa and sacculus are presented and a medial costal extension is absent like in Miltochrista (Figs 5,10,16) and some other genera of the Miltochrista-Asura generic complex, e.g., Lyclene Moore, [1860] (Figs 7, 12, 17) and Cabarda Walker, 1863 (Figs 8, 13, 18), but in Gurna the valva is very broad.The shape of valva in Gurna resembles that of the genus Ovipennis Hampson, 1900 (Figs 6, 11, 15), but the latter has a medial costal extension like in genera of the Barsine Walker, 1854 and Asura Walker, 1854 lieages.The vesica sclerotization is characteristic: in Gurna, besides a bunch of cornuti, there is a large field of numerous narrow spinules, whereas in other related genera distinct cornuti, bunches of long and narrow cornuti, or rarefied fields of robust and small cornuti are presented only.In the female genitalia (Fig. 14), the very short membranous ductus bursae is characteristic; a presence of numerous very small spinules on the main part of corpus bursae occurs also in some representatives of the genera Lyclene and Barsine.Ground color of forewing dark brown, pattern consist of two bright yellow spots: upper one in medial area between Sc and M and lower one on hind margin.Hindwing bright yellow basally and dark brown outwards.Male genitalia (Fig. 9).Uncus long, narrow, laterally flattened, medially broadened dorso-ventrally, with pointed claw-like tip; scaphium and subscaphium narrow and weakly sclerotized.Tegumen broad and curved dorsoventrally; juxta broad, shield-like; vinculum moderately large, V-shaped.Valva very broad, distally broadened, costal margin strongly curved; distal costal extension well expressed, large, triangular, with pointed tip; sacculus narrow, with strongly setose dorsal margin; distal saccular extension hort, robust, thorn-like.Aedeagus large, elongated, slightly curved; vesica globular, with medio-dorsal bunch of five large spine-like cornuti and subapical round area of numerous long and narrow spines; basal plate of ductus ejaculatorius short and narow.Female genitalia (Fig. 14).Ovipositor short and broad; apophyses anteriores and posteriores long and thin; ductus bursae membranous, very short and broad; corpus bursae globuar, its anterior end membranous, but all other parts with numerous small spinules; appendix bursae short, narrow, conical, situated medially.7th sternite with large lateral pockets.

Gurna
Note.Moore (1879) did not mention a number of type specimens in the original description of Dysauxes indica, so, despite there is only one type specimen in the NHM collection, it is treated here as a syntype.
Diagnosis.See that of the genus.