Orseolia apludae (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 : 49

Orseolia apludae (Felt)

[ Fig. 26 a–b]

Orseoliella apludae Felt, 1920: 8

Orseolia apludae Felt: Gagné (1973: 506) , new combination; Gagné (1985: 137), revision.

Material examined. Lectotype male, designated by Gagné (1985: 138) and paralectotype female, reared from a leaf sheath gall on Apluda mutica (as A. varia ) at Coimbatore, Tamil Nadu, India, 1-i-1917, Felt type #a2974. Male, female, pupal exuviae, same locality as types, collected 1921.

Description. Male terminalia as in Fig. 26b .

Pupa, larva unknown.

Biology. This species causes a gall on Apluda mutica L. ( Poaceae ) described simply as a leaf sheath gall by Felt (1920) from India, but later extended by DvLR & Dvl (1926, gall No 52, Fig. 28 [ Fig. 26a ]) who found it on the same host in Indonesia. The gall protrudes from the sheath of the youngest leaf. The leaf blade remains undeveloped. The sheath is shaped into a tube enclosing and supporting the growth tip. The gall grows out of the older leaves and buds which develop after the infection and are long and thin, with a slender apex.

Geographical distribution. Orseolia apludae was collected and reared at Coimbatore, Tamil Nadu, India, 1-i-1917 ( Felt 1920). The galls were found in Indonesia in Salatiga , Java, alt. 600 m, vi-1909 and Kamal, Madura Island , v-1910 (DvLR & DvL 1926) .

Figures

FIGURES 26a–b. Orseolia apludae: a, gall on Apluda mutica (arrows indicate galls; Fig. 28 of DvLR & DvL (1926)); b, male terminalia (dorsal, cerci omitted, from Gagné 1985). Figs 26c–d. Orseolia graminis: c, gall on Ottochloa nodosa (arrow indicates gall; Fig. 38 of DvLR & DvL (1926)); d, last two female flagellomeres (from Kieffer & DvLR (1910)).

FIGURES 28a–e. Orseolia graminicola: a, male flagellomere; b, young gall on Cynodon dactylon; c, female flagellomere; d, mature gall on Cynodon dactylon; e, male terminalia (ventral). Figs a, c, e from Kieffer & DvLR 1910), Figs b and d from DvLR & DvL (1926, Figs 29, 30). Arrows indicate galls.