Ceratovacuna multiglandula Qiao

Jiang, Liyun, Chen, Jing, Guo, Kun & Qiao, Gexia, 2015, Review of the genus Ceratovacuna (Hemiptera: Aphididae) with descriptions of five new species from China, Zootaxa 3986 (1), pp. 35-60 : 47-49

Ceratovacuna multiglandula Qiao sp. n.

( Figures 58–80 , Table 1)

Apterous viviparous female. Body darken brown, covered with white powder in life.

Mounted specimens: Body oval ( Fig. 70 ), 1.67–1.81 times as long as its width. Head and pronotum fused ( Figs 58 , 71 ). Frontal horns, antenna, eyes, rostrum, coxae and femora brown, the other parts pale brown. Dorsum of body with wax gland plates on marginal sclerites, composed with round wax gland facets ( Figs 63 , 76 ). Dorsum of head with 1 pair of wax gland plates between eyes, composed with 18–26 wax gland facets; thoracic nota and abdominal tergites I–VII each with 1 pair of marginal wax gland plates, wax gland plates on tergite I composed with 12 or 13 facets, the others composed with 14–24 facets; tergite VIII covered by one big wax gland plate, composed with 31–38 facets. Dorsum of body with irregular sculptures ( Figs 64, 65 , 76, 77 ); dorsal setae of body short. Head with 1 pair of cephalic and 4 pairs of dorsal setae; pronotum with 2 pairs of spinal, 2 pairs of pleural and 1 pair of marginal setae; mesonotum and metanotum each with 1 pair of spinal, 1 pair of pleural and 2 pairs of marginal setae; abdominal tergites I–V each with 1 pair of spinal, pleural and marginal setae; tergites VI and VII each with 1 pair of spinal and marginal setae; tergite VIII with 2 spinal and 5–10 marginal setae; cephalic setae, marginal setae on abdominal tergite I, setae on abdominal tergite VIII 0.67–1.67, 0.67–1.33 and 1.33–2.00 times as long as basal diameter of antennal segment III, respectively. Spiracles round, open, on pale brown spiracular plates. Head. Head with 1 pair of frontal horns ( Figs 59 , 72 ), 1.00–1.33 times as long as its basal width, 0.67–0.91 times as long as antennal segment II. Antenna 4–segmented ( Figs 60 , 73 ), 0.12–0.15 times as long as body; segments I– IV each with 1 or 2, 1 or 2, 1 or 2, 1 or 2+0 setae, respectively; setae on segment III 0.33–0.67 times as long as basal diameter of the segment; segments III and IV each with one non-ciliated primary rhinarium; processus terminalis 0.33–0.72 times as long as base of the segment IV, with 4 or 5 apical setae. Rostrum short, reaching over fore coxae; ultimate rostral segment escutcheon-shaped ( Figs 61 , 74 ), 0.76–1.25 times as long as its basal width, 0.52–0.68 times as long as second hind tarsal segment; with 3 pairs of primary setae, without secondary setae.

Thorax. Mesosternal furca pale brown, with two arms separated ( Figs 62 , 75 ), each arm 1.67–2.33 times as long as basal diameter of antennal segment III. Legs smooth, with a few setae; trochanter and femur fused, hind trochanter and femur 3.09–3.48 times as long as antennal segment III; hind tibia 0.22–0.27 times as long as body; setae on hind tibia 0.96–1.27 times as long as its mid-diameter. First tarsal chaetotaxy: 2, 2, 2.

Abdomen. Siphunculi ring-like ( Figs 66 , 78 ), between abdominal tergites IV and V, apical diameter 1.67–2.00 times as long as basal diameter of antennal segment III. Cauda, anal plate and genital plate with spinules. Cauda knobbed ( Figs 67 , 79 ), constricted near base, 0.50–0.58 times as long as its basal width, with 7–12 long and short setae. Anal plate bilobed ( Figs 68 , 80 ), with 11–15 long and short setae. Genital plate broad round, with 4 short pointed anterior setae and 8–10 posterior setae ( Fig. 69 ).

Holotype. CHINA: Apterous vivipara, Zhejiang (Deqing County), on Pseudosasa japonica (Sieb. et Zucc.) Makino , 25.x.2003 (Xu TS) [No. Y 8668–1–3–3]. Paratypes. CHINA: 4 apterous viviparae and 2 apterous viviparae ( BMNH) [No. Y 8668]; 2 apterous vivipara, Zhejiang (Anji County), on one kind of bamboo, 29.v.2011 (Chen J, Liu QH & Li XT) [No. 26749]; 2 apterous vivipara, Zhejiang (Mt. Jiulongshan), on Phyllostachys heterocycla (Carr.) Mitford cv. Pubescens, 4.vi.2011 (Chen J, Liu QH & Li XT) [No. 26819]; the other information same as holotype; 6 apterous viviparae, Zhejiang, on Phyllostachys angusta , viii.1974 (Chen JT) [No. Y 1086].

Distribution. China (Zhejiang).

Biology. The new species feeds on the undersides of leaves on Pseudosasa japonica (Sieb. et Zucc.) Makino or Phyllostachys angusta (Poaceae) .

Etymology. The new species, Ceratovacuna multiglandula is named after the characteristics of its wax plates, composed of many wax facets, “ multi - (Latin word)” means many, “ glandula (Latin word)” means wax gland.

Remarks. The new species is most similar to Ceratovacuna longifila in the wax gland plates on abdominal tergites II–VII with more than 11 facets and tergite VIII with more than 25 facets, but differs from C. longifila as follows: each wax gland plate between eyes is composed with 18–26 wax gland facets ( C. longifila : without wax gland plate between eyes); abdominal tergite VIII with 2 spinal and 5–10 marginal setae ( C. longifila : 4 setae); first tarsal chaetotaxy: 2, 2, 2 ( C. longifila : 3, 3, 2).

Figures

FIGURES 58 – 69. Ceratovacuna multiglandula Qiao sp. n. Apterous viviparous female: (58) dorsal view of head and prothorax; (59) frontal horn; (60) antenna; (61) ultimate rostral segment; (62) mesosternal furca; (63) dorsal view of abdomen; (64) spinal sculptures on abdominal tergites; (65) marginal sculptures on abdominal tergites; (66) siphunculus; (67) cauda; (68) anal plate; (69) genital plate. Scale bars = 0.10 mm.

FIGURES 70 – 80. Ceratovacuna multiglandula Qiao sp. n. Apterous viviparous female: (70) dorsal view of body; (71) dorsal view of head and prothorax; (72) frontal horns; (73) antenna; (74) ultimate rostral segment; (75) mesosternal furca; (76) wax gland plate and marginal sculptures on abdominal tergites; (77) spinal sculptures on abdominal tergites; (78) siphunculus; (79) cauda; (80) anal plate. Scale bars = 0.10 mm.