Setisquamalonchaea korea, Introduction & Fallén & Morge, 2007

Introduction, Iain, Fallén, Lonchaea & Morge, Setisquamalonchaea, 2007, New pecies of Lonchaeidae (Diptera: Schizophora) from Asia, Zootaxa 1631, pp. 1-32 : 12-13

Setisquamalonchaea korea sp. nov.

Description: Holotype male: Head: Eyes bare. Frons velvet black, narrowing gradually to a point two thirds of the way between anterior ocellus and lunule margin, at its narrowest point 40% eye width, with approximately twelve frontal setulae and numerous interfrontal setulae, all of these short, not more than one sixth the length of orbital setae, some longer setulae present along anterior margin. Orbital plate narrow, subshining black and without setulae. Lunule with six setulae, sparsely silvered as are the face and parafacials. Anterior genal setulae extending in a single row of four along mouth margin, these set slightly apart from the other genal setulae but not noticeably longer or stronger than them. Antennal flagellomere twice as long as broad entirely black apart from a small orange spot basally on inner surface. Arista entirely black, short pubescent, width laterally equivalent to the width of the arista. Thorax: disc subshining black and covered in sparse dusting as are pleurae, with appressed setulae which are no more than one third length of orbital setae. Notopleural depression bare apart from two setae. Anepisternum with three strong anterior setae and four strong posterior setae. Katepisternum with two strong setae, posterior of these only slightly longer and stronger than anterior. One propleural and one slightly weaker stigmatical setae. Prosternum bare. Scutellum on margin with two setulae between lateral and apical setae, two between the apical setae, these all relatively short. Squamae pale with golden margin and a pale fringe, about four of the setulae in the middle of fringe distinctly longer than the others. Wings slightly yellowish anteriorly. Wing length 5.0 mm. Intercostal space just less than twice length of crossvein R-M. Legs all black but with a ventral fringe of golden setulae on apical part of the anterior tibiae and on basal and second tarsomeres of anterior and posterior legs. Abdomen, first sternite bare.

Male terminalia; Figs. 23–25. In lateral view epandrium almost twice as high as wide, rather rectangular in shape, bearing three or four well spaced setulae on posterior margin and with fringe of long setulae along ventral margin. Cerci also rather rectangular, less than half height of epandrium, not sclerotised, bearing a few scattered setulae along posterior margin and a denser fringe along ventral margin. Surstyli extending ventrally from the shell of epandrium and forming a posteroventral process reaching up to one third of the height of the cerci. In ventral view margin of surstyli with a slight excavation anteriorly. Two small broad, triangular processes present at base of the cerci. Aedeagus a very simple, vase-like structure, basally swollen with a narrower apex.

Female: apical segment of the ovipositor long and narrow, dorsally bearing two long, pale setulae half way along, these 75% the length of the segment, ventrally just before apex with another pair half as long as the segment.

Differential diagnosis: Although there is still some lack of clarity regarding the boundaries of the genus Setisquamalonchaea in south-east Asia this particular species seems to agree relatively well with the nominate species of the genus S. fumosa (Egger, 1862) known from Europe. This new species has two strong setae on katepisternum, almost bare arista and squamal fringe bearing a group of long setulae centrally. The male terminalia also agree with that of S. fumosa in that the surstylus projects as a simple process posteroventrally and the aedeagus is a rather simple one piece tube. The female also shares with S. fumosa the characteristic of a pair of long dorsal setulae situated medially on the apical section of the ovipositor. The only major difference between this species and S. fumosa , apart from the features of the terminalia, is that there are no setulae present on the margins of the first abdominal sternite.

TYPE MATERIAL: Holotype male. SOUTH KOREA; G angwong-do, Jeong Seon-gun , 24.vi.2005, 900– 1120m, Mt. Mindungsan, 37°16.2’N / 128°45.5’E, Merz, Han, Choi, Lee, Hwang & Sok leg. Forest meadow, 15.

Paratypes. 1 male with the same data as the holotype. G angwong-do, Wonju Yonsei Univ. campus Maejiri, 240m, 22.vi.2005, 37°16’N / 127°54’E, leg. B. Merz, 13, dry and wet forest park behind student home , one male. G angwong-do, Hoeng-seon-gun, 18.vi.2005, 900– 1120m, Mt. Cheongtaesan , 37°30’N / 128°18’E, Merz, Han, Choi, Lee & Hwang leg., 9, Forest hilltop , one female. G angwong-do, Wonju Yonsei Univ. campus, Maeji-ri, 240m, 25.vi.2005, 37°16’N / 127°54’E, leg. B. Merz, 13, wet forest behind student home , one female.

Holotype in the YSUW, other material in MHNG.

Etymology. The specific epithet refers to the country of capture of the type material