Dasineura elatostemmae Felt

Kolesik, Peter & Gagné, Raymond J., 2020, A review of the gall midges (Diptera: Cecidomyiidae) of Indonesia: taxonomy, biology and adult key to genera, Zootaxa 4847 (1), pp. 1-82 : 25

Dasineura elatostemmae Felt

[ Figs 11 a–g]

Dasyneura elatostemmae Felt, 1921b: 140 .

Material examined. Syntypes, male, female, reared from petiole galls on Elatostema sp. [specified as Elatostema paludosum Miq. by DvLR & DvL (1926), see Remarks below] at Mt Ungaran, alt. 1000 m, 1910, Felt #a3095). Felt (1921b) gives the year 1914, likely an error (see DvL 1921). Felt’s single slide bears both type specimens. The male is mounted laterally, the abdomen uncleared, wings entirely shriveled, head and palpi partly shriveled, antennae with all 12 flagellomeres present, slightly shriveled, two legs with all segments, parts of remaining legs missing, terminalia partially misaligned and slightly shriveled. The female is uncleared, with wings entirely shriveled, head and palpi partially shriveled, antennae with all 12 flagellomeres present, slightly shriveled, all legs entire, cerci well-preserved.

Description. Male. Length 1.25 mm ( Felt 1921b). Palpus 4-segmented, progressively longer ( Fig. 11f ). Flagellomeres with nodes twice as long as wide, necks as long as nodes ( Fig. 11c ). Tarsal claws toothed, as long as empodia ( Fig. 11d ). Terminalia: mesobasal lobes sheathing aedeagus with 4 short-setose distal papillae, gonoxocal apodemes merged basally, cerci large, tapered to apex, hypoproct divided into two narrow lobes, each with setae apically, gonostylus long, tapered, sparsely setose, setulose at basal 1/7 dorsally and 3/5 ventrally ( Fig. 11b ).

Female. Length 1.5 mm ( Felt 1921b). Flagellomeres with neck 1/10 length nodes ( Fig. 11g ). Fully extended ovipositor as long as remainder of abdomen; fused cerci 5x longer than wide, cylindrical, setulose, setose, these denser apically, several of them thickened; hypoproct about 1/5 length of cerci ( Fig. 11e ).

Pupa unknown.

Larva. White (DvL (1921).

Remarks. At the time of the type series collection at Mt Ungaran on 7-v-1910, the host plant was not in bloom and its identification to species level was not possible (DvL 1921). The plant was identified later as Elatostema paludosum Miq. by DvLR & DvL (1926), evidently based on the second collection of this species in xi-1919.

Biology. This species causes [single-chambered] stem and petiole galls on Elatostema paludosum Miq. (Urticaceae) . The gall was described by DvL (1921, Fig. 1 [ Fig. 11a ]) as follows. They are mostly spheroid or oblong swellings of the stem and the midrib. The petiole and the flower stalk can also be infested. The surface is smooth and light green. Inside is a small larval chamber with a white larva.

Geographical distribution. This species is known from its type locality at Mt Ungaran , Java, alt. 1000–1200 m, where it was found 7-v-1910 and xi-1919 (DvL 1921; DvLR & DvL 1926) .

Figures

FIGURE 1. Authors of “The Zoocecidia of the Netherlands East Indies” published in 1926. Left: Jenny Docters van Leeuwen- Reijnvaan (1880–1963) in 1907. Middle: Willem Marius Docters van Leeuwen (1880–1960) in 1926. Right: Mt Gede, collection locality of many Indonesian Cecidomyiidae, 1871 oil painting “River Valley in Java with Mt. Gede and Mt. Pangrango in the Background” by Raden Saleh (Collection of the Tan Family, National Gallery Singapore).

FIGURES 11a–g. Dasineura elatostemmae: a, galls on Elatostema paludosum, one in cross section at bottom right (Fig. 1 of DvL 1921); b, male terminalia (dorsal), top left: gonostylus (ventral), gonocoxites shriveled, cerci and hypoproct artifactually flipped ventrally; c, outline of male 6th flagellomere, partially shriveled; d, last tarsomere with claw and empodium; e, female terminalia (lateral); f, male palpus; g, outline of female 6th flagellomere, partially shriveled.