Anodontoceras saigusai Yukawa, 1967

Jaschhof, Mathias & Jaschhof, Catrin, 2009, First record of Anodontoceras (Diptera: Cecidomyiidae: Lestremiinae) from the Afrotropical Region, with a description of a new species, African Invertebrates 50 (1), pp. 117-122 : 120

Anodontoceras saigusai Yukawa, 1967

Fig. 3

This species is known to occur in the Far East of Russia (Primorskiy Kray), in Japan (Kyushu) and Malaysia (Selangor Province on the Malay Peninsula) ( Jaschhof 1998 a, b). As shown here, A. saigusai is actually widely distributed across the Japanese archipelago, occurring from Hokkaido in the north to Iriomote, in the Ryukyu Islands, in the south. It is worth noting that this species copes with forest environments as different as cool temperate deciduous forest (Hokkaido, Honshu) and tropical rain forest (Malay Peninsula). A female that we captured by aspirator together with a conspecific male on Okinawa, Japan, is the first known example of a female Anodontoceras and is described below.

Description:

Female.

Body size 1.1 mm.

Head:Antenna broken, maximally 4 flagellomeres retained. Basal flagellomeres ( Fig. 3 ) with barrel-shaped nodes and short stems, the latter inserted not centrically on node but shifted dorsally. Node wrinkled, with 1 basal whorl of short hair-shaped translucent sensilla, 1 sub-basal whorl of long setae, 1 mesoventral row of short hair-shaped translucent sensilla, and 4 large monoporous leaf-shaped translucent sensilla. Node of first flagellomere with basal scales and only single hair-shaped translucent sensilla ( Fig. 3 ).

Wing: R1 barely 1.5 times as long as Rs.

Abdomen: Abdominal cavity filled with innumerable eggs of ordinary size and shape. Terminalia: Telescopic , lacking any striking features.Basicercus and disticercus subequal in size. Spermathecae 2, comparatively large, sclerotized, disc-shaped, lacking light plaques.

Discussion: Characters of the female, in particular those of the antennae and spermathecae, support the classification of the genus Anodontoceras with the tribe Micromyini . A unique feature among female Lestremiinae is the flagellomere necks inserted more dorsally, not centrically, on the nodes, which is actually a character typical of lestremiine males (cf. Fig. 3 ). A wrinkled surface of the flagellomere node, as present in female Anodontoceras , is similarly found in female Trichopteromyia (also in Micromyini ), but there are no other characters that would support a closer relationship of these two genera, so we think this must be due to convergence.

Material examined: JAPAN: 5 ♂ Hokkaido, Sapporo City, Toyohira , 29.vi–26.vii.1999, K. Fukuyama & M. & C. Jaschhof; 2 ♂ Hokkaido, Tomakomai City, Hokkaido University Experimental Forest , 30.vi–26.vii.1999, M. & C. Jaschhof; 5 ♂ Honshu, Iwate Pref., Tamayama Village , Koma , 26.v–15.vi.1999, T. Gotoh; 1 ♂ same locality, 13.ix–12.x.1999; 3 ♂ Honshu, Aomori Pref., Towadako Town , Tsuta Onsen , 25.vi–28.vii.1999, M. & C. Jaschhof; 2 ♂ Honshu, Ibaraki Pref., Abukuma Highlands , Kitaibaraki City , Sadanami , Ogawa Research Forest , 6–20.viii.1996, K. Maeto; 1 ♂ same locality, 11.v–1.vi.1999, M. & C. Jaschhof; 2 ♂ Honshu, Kyoto Pref., Kyoto City , Kuta Research Forest , 22.ix–24.x.1999, M. & C. Jaschhof; 1 ♂ Kyushu, Miyazaki Pref., Aya Town , Aya Research Forest , 5–20.x.1999, M. & C. Jaschhof; 9 ♂ Okinawa Pref., Okinawa , Yambaru Peninsula , Yona Village , 17–21.iii.1999, M. & C. Jaschhof; 4 ♂ Yambaru Peninsula , Benoki Dam , 6–18.v.2000, M. & C. Jaschhof; 1 ♂ 1♀same locality, 13.v.2000, M. Jaschhof; 3 ♂ Yambaru Peninsula , Mt. Nishimedake , 6–18.v.2000, M. & C. Jaschhof; 2 ♂ Okinawa Pref., Ryukyu Islands , Iriomote , Funaura , Mare R. , 5–15.iii.1999, M. & C. Jaschhof.

Figures

Figs 1–3. Morphology of Anodontoceras spp.: (1) A. harrisi sp. n., holotype, male terminalia and abdominal sternites 7 and 8, ventral view; (2) A. harrisi sp. n., male paratype, fourth flagellomere in ventrolateral view; (3) A. saigusai Yukawa, first and second flagellomeres of female, lateral view, Okinawa, Japan. Scale bar = 0.05 mm.