Dorsoceraricoccus ningboensis Dong & Wu, 2017

Dong, Qin-Gang, Zhang, Jiang-Tao & Wu, San-An, 2017, A new genus and species of Pseudococcidae (Hemiptera: Sternorrhyncha: Coccomorpha) from China, Zootaxa 4299 (4), pp. 592-600 : 595-599

Dorsoceraricoccus ningboensis Dong & Wu sp. nov.

( Figs 1 and 2 )

Material examined. Holotype: adult ♀ on a slide by itself, CHINA, Zhejiang Province, Ningbo City, Simingshan National Forest Park [29°73.2’ N, 121°09.2’ E], on crown of Digitaria sp. ( Poaceae ), 1. viii. 2016, coll. Qin-Gang Dong & Jiang-Tao Zhang (at BFUC) . Paratypes: 2 adult ♀♀ on separate slides, same data as holotype; (1 at BFUC, 1 at IZCAS) .

Description. In life, body of adult female oval ( Fig. 1 ), dark reddish, with thick covering of white mealy wax and about 6 or 7 wax protuberances on midline of dorsum; also with 17 pairs of lateral wax filaments around body margin, caudal wax filaments obviously longer than the others.

Adult female on microscope slide with body elongate oval ( Fig. 2 ), 1.5–2.1 mm long, 0.9–1.2 mm wide. Antennae 7 segmented, each 365–418 µm long, lengths of each segment: I 55 –65, II 43 –58, III 53 –60, IV 53 – 68, V 30 –38, VI 38 –40, and VII 85 –98 µm. Eye spot present, located on body margin behind antennae, without discoidal pores next to eye. Clypeolabral shield 153–180 µm long, 135–143 µm wide. Labium 3 segmented, 128–155 µm long, 63–93 µm wide. Ratio of lengths of labium to clypeolabral shield 1: 1.16–1.27. Legs well developed, each trochanter with 2 campaniform sensilla on each surface, claw without denticle, tarsal claw digitules all knobbed, longer than claw. Translucent pores present on hind coxa. Lengths of hind coxa 118–128 µm, hind trochanter + femur 250–278 µm, hind tibia + tarsus 298–343 µm, claw 23–28 µm long. Ratio of lengths of hind tibia + tarsus to hind trochanter + femur 1: 0.81–0.85, ratio of lengths of hind tibia to tarsus 1: 0.41–0.46. Circulus oval, 33–38 µm wide, situated between abdominal segments III and IV, not divided by an intersegmental line; surrounded by an outer, slight wrinkle. Ostioles represented by anterior and posterior pairs, with inner edges of lips slightly sclerotized, each lip with 1 or 2 setae and a few trilocular pores. Cerarii on margins always recognisable by concentration of trilocular pores, numbering 16 or 17 pairs (when 16 pairs, C9 usually absent). Anal lobe cerarii each bearing 2 conical setae, each seta 23–25 µm long and with setal collar 7–10 µm in diameter, associated with 4 or 5 auxiliary setae and 28–32 trilocular pores, all situated on sclerotized area about same size as anal ring. Other lateral cerarii each usually bearing 2 conical setae, with 5–12 trilocular pores but no auxiliary setae, all situated on membranous area or sometimes on faintly sclerotized area; except for the 3 pairs of cerarii on head, these each usually containing 3–5 conical setae. Anal lobes moderately developed, ventral surface of each lobe with an apical seta 133–175 µm long and a small, almost quadrate sclerotized area around subapical seta. Anal ring usually situated at apex of abdomen, 75–78 µm long, 60–63 µm wide, bearing 6 setae, each seta 128–150 µm long.

Dorsum. Setae mostly short and stiff, each 10–25 µm long, occasionally 1 or 2 slender setae on abdominal segment VIII each about 43–50 µm long. Conical setae similar to lateral cerarian setae, also present on midline, forming 6 or 7 dorsal cerarii (Figs 3C, D), each cerarius bearing 2–5 conical setae and 5–12 trilocular pores, often situated on weakly sclerotized cuticle. Dorsal cerarii similar to lateral cerarii (except anal lobe cerarii) (Figs 3A, B), present on midline from head to posterior abdominal segments in a longitudinal row, with 4 on head and thorax, the FIGURE 3. Structure of the cerarii. A. Antepenultimate cerarius (C15); B. Frontal cerarius (C1); C. Dorsal cerarius on abdominal segment VI; D. Dorsal cerarius on abdominal segment VII.

others on abdominal segments I, VI and VII (occasionally that on abdominal segment VI absent). Single dorsal conical seta occasionally present on midline of other abdominal segments. Trilocular pores evenly distributed. Multilocular disc pores absent. Oral collar tubular ducts of 2 sizes: larger type, each 10–12 µm long and 4–5 µm wide, about same diameter as trilocular pore, present in transverse rows across most abdominal segments and around body margin, but sparse in medial areas of head, thorax and abdominal segment VIII; smaller type, each about 6–7 µm long and 2–3 µm wide, narrower than the diameter of trilocular pore, sparsely distributed among large ducts on abdomen, occasionally present on thorax.

Venter. Flagellate setae present, on head each 33–138 µm long, on abdomen 18–58 µm long. Trilocular pores evenly distributed. Multilocular disc pores, each 7–9 µm in diameter, present on abdominal segments V–VIII, with 0–6 pores on segment V; forming single rows at anterior and posterior edges of segment VI; in more-or-less double rows at anterior and posterior edges of segment VII, and others present posterior to vulva. Oral collar tubular ducts of 2 sizes, similar to those on dorsum; larger type numerous, present in transverse rows along posterior margins of abdominal segments II–VII and in groups along margin as far forward as head; smaller type sparsely distributed among large-type ducts.

Remarks. Dorsoceraricoccus ningboensis can be separated from D. muajatae by the following features (condition of D. muajatae given in parentheses): (i) antennae with 7 segments (8 segments); (ii) oral collar tubular ducts of 2 sizes, distributed on both dorsum and venter (1 size, on venter only); (iii) dorsal cerarii each bearing not less than 2 conical setae (each mostly containing just 1 conical seta), only situated on midline from head to posterior abdominal segments, never on submedial and submarginal areas (present on most parts of dorsum); (iv) translucent pores present on hind coxa, not on hind femur or tibia (translucent pores absent from hind coxa, present on hind femur and tibia); (v) multilocular pores on venter of segments V or VI–VIII (multilocular pores on segments VII and VIII).

Etymology. The name is based on the collection locality, Ningbo city.

Figures

FIGURE 1. Habitus photographs of Dorsoceraricoccus ningboensis Dong & Wu sp. nov. on Digitaria sp. (Poaceae).

FIGURE 2. Adult female of Dorsoceraricoccus ningboensis Dong & Wu, sp. nov. A. Ventral flagellate seta on head; B. Large type of oral collar tubular duct; C. Trilocular pore; D. Hind coxa; E. Claw without denticle; F. Small type of oral collar tubular duct; G. Multilocular disc pore; H. Anal lobe cerarius; I. Dorsal cerarius; J. Dorsal seta; K. Frontal cerarius (C 1).