Chiosperma turgidum Gagné, 2016

Gagné, Raymond J., 2016, Three new genera and three new species of Nearctic Lasiopteridi (Diptera: Cecidomyiidae: Cecidomyiinae) from Asteraceae and Caprifoliaceae, and the tribe Rhopalomyiini subsumed under Oligotrophini, Zootaxa 4158 (3), pp. 403-418 : 417

Chiosperma turgidum Gagné , new species

Figs 6 , 32–41 .

Description. Adult: Wing ( Fig. 8 ) length: male 5.6–6.0 (n=7, avg.=5.7); female 4.7–5.3 mm (n=6, avg.=5.1). Head as in Fig. 33 , palpus 1- or 2-segmented, antennal flagellomeres as in Figs 34–35 . Acropods as in Figs 36–37 . Male terminalia as in Figs 41 –42. Female postabdomen as in Figs 32 , 39 .

Pupa. Anterior segments ( Fig. 38 ) as in the generic description.

Larva, third instar. Spatula lacking. Length of the one poor specimen, ca. 2.5 mm.

Material examined. HOLOTYPE: male, from Symphoricarpos albus, Spokane , Washington, 25.iv.1997, D. Kinateder . Paratypes: 5 males, 6 females, 3 pupae and 1 larva, same data as holotype .

Etymology. The specific name turgidum (Latin for swollen) refers to the enlargement of host's buds caused by this species.

Life history. This species is responsible for an elongate, swollen bud gall ( Fig. 3 ) on Symphorocarpos albus . Buds are enlarged, about 5 mm wide by 8–10 mm long, and do not open.

Figures

FIGURES 4 – 6. Wings. 1, Helianthecis capitum. 2, Lonicerae russoi. 3, Chiosperma turgidum. Line = 1 mm.

FIGURES 31 – 32. Female abdomens, end of fourth segment to cerci (dorsolateral). 31, Lonicerae russoi. 32, Chiosperma turgidum. Letter a: position of lateral setae on fifth tergite, at midlength on L. russoi, farther anteriad on C. turgidum; b: presence of scales on L. russoi, their absence on C. turgidum; c: weakly sclerotized area of seventh sternite anteriad of the posterior setal rows; d: lateral sclerite of protrusible part of the ovipositor. Line = 0.5 mm.

FIGURES 33 – 39. Chiosperma turgidum. 33, Head (frontal, flagella removed). 34, Male third flagellomere (ventral). 35, Female third flagellomere (ventral). 36, Claw and empodium (lateral). 37, Acropod (mesal). 38, Pupal anterior parts (ventral, part of an antennal base missing). 39, End of ovipositor (lateral).

FIGURES 40 – 41. Chiosperma turgidum. 40, Male terminalia, one gonopod removed, one mediobasal gonocoxal lobe visible between lobes of hypoproct (dorsal), aedeagus not shown. 41, Male terminalia (lateral).

FIGURES 7 – 14. Helianthecis capitum. 7, Head (frontal, flagella removed). 8, Male third flagellomere (ventral). 9, Female third flagellomere (ventral). 10, Acropod (lateral). 11, Male terminalia (lateral). 12, Same, one gonopod removed (dorsal). 13, Same (ventral). 14, Male sixth (on left) through eighth abdominal tergites.

FIGURES 1 – 3. Galls. 1, Lonicerae russoi on Lonicera hispidula (photo by R. Russo). 2, Lonicerae lonicera on Lonicera subspicata (photo by R. Russo). 3, Chiosperma turgidum on Symphoricarpos albus (photo by M. Althaus). Line = actual size of gall.