Gracilorrhina gracilis, Hippa, Heikki, Mattsson, Ingegerd & Vilkamaa, Pekka, 2005

Hippa, Heikki, Mattsson, Ingegerd & Vilkamaa, Pekka, 2005, New taxa of the Lygistorrhinidae (Diptera: Sciaroidea) and their implications for a phylogenetic analysis of the family, Zootaxa 960, pp. 1-34 : 19

Gracilorrhina gracilis sp. n.

Material studied. Holotype male: MALAYSIA, Pahang, Genting Highlands, Gunung Ulu Kali, 1745 m (5725 ft.), Malaise trap, 5–22.III.1997, H. Hippa, M. Jaschhof & B. Viklund ( NRM). Paratypes: same data as holotype, 23 ♂ ( NRM).

MALE. Head. Fig. 3 A. Flagellomere 4, Fig. 4 E. Colour light brown, darker brown at vertex and on dorsal part of occiput, colour of setae dark, colour of antenna similar to ground­colour of head, without any colour pattern.

Thorax. Fig. 6 A. Anterior pronotum with 2 or 3 setae. Episternum 1 with 2–4 setae. Laterotergite with 0–2 setae. Colour pale brown with a darker brown medial stripe over scutum and scutellum, colour of setae dark Wing. Fig. 8 D. Wing length 1.34–1.54 mm. Colour hyaline, tinged with brownish especially anteriorly and in many specimens also broadly along posterior margin. Legs. Fig. 6 B, C and D. Unicolourous and concolourous with thorax, or coxa 2 and whole of hind leg slightly darker than the other parts. Abdomen. Colour unicolourous pale brown, paler than thorax. Hypopygium, Fig. 10 A and B.

FEMALE. Unknown.

Discussion. For its distinguishing characters, see under Gracilorrhina above.

Figures

FIGURE 3. Male (A) and female (B) head, frontal view. A: Gracilorrhina gracilis sp. n. (paratype). B. Lygistorrhinidae sp. 1 (Malaysia). Scale 0.10 mm.

FIGURE 4. Antennal flagellomere 4, lateral view. A: Blagorrhina blagoderovi sp. n. (paratype). B: Labellorrhina quantula sp. n. (paratype). C: Lygistorrhinidae sp. 1 (Malaysia). D: Blagorrhina brevicornis sp. n. (paratype). E: Gracilorrhina gracilis sp. n. (paratype). F: Labellorrhina grimaldii sp. n. (holotype). Scale 0.05 mm. 1: socketed seta, 2: seta­like sensillum / unsocketed seta, 3: peglike sensillum.

FIGURE 6. Gracilorrhina gracilis sp. n. (paratypes): male thorax (A), lateral view, hind femur, tibia and basitarsomere (B), prolateral view, apical part of hind tibia (C), retrolateral view and apical part of middle tarsus (D), prolateral view. Scale for A 0.10 mm, for B 1 mm, for C and D 0.05 mm. 1: scutum, 2: scutellum, 3: posterior pronotum, 4: anterior pronotum, 5: episternum 1, 6: prosternum, 7: anterior spiracle, 8: anterior anepisternum, 9: katepisternum, 10: position of pleural pit, 11: epimeron 2, 12: laterotergite, 13: episternum 3, 14: epimeron 3, 15: posterior spiracle, 16: mediotergite, 17: furcasternum 2, 18: coxa 1, 19: coxa 2, 20: coxa 3, 21: haltere, 22: abdominal tergite 1, 23: abdominal sternite 1, 24: socketed seta, 25: non­socketed seta (trichium), 26: microtrichia, 27: dot­like sensillum.

FIGURE 8. Male (B­E) and female (A) wing, dorsal view. A: Lygistorrhinidae sp. 2 (Malaysia). B: Labellorrhina grimaldii sp. n. (holotype). C: L. quantula sp. n. (paratype). D: Gracilorrhina gracilis sp. n. (paratype). E: Blagorrhina blagoderovi sp. n. (paratype). Scale 0.50 mm.

FIGURE 10. Gracilorrhina gracilis sp. n. (holotype): part of male hypopygium (A) and gonostylus (B), ventral view. Scale 0.05 mm.