Antecerococcus roseus (Green) Green, 2016

Chris J. Hodgson & Douglas J. Williams, 2016, (Hemiptera: Sternorrhyncha, Coccomorpha) with particular reference to species from the Afrotropical, western Palaearctic and western Oriental Regions, with the revival of Antecerococcus Green and description of a new genus and fifteen new species, and with ten new synonomies, Zootaxa 4091 (1), pp. 1-175 : 106-110

Antecerococcus roseus (Green) , comb. nov.

( Figs 40 & 41 )

Cerococcus roseus Green 1909: 310 .

Phenacobryum roseus (Green) ; Tang & Hao 1995: 242. Change of combination. Phenacobryum indigoferae Borchsenius 1960: 111 . Syn. nov.

Cerococcus indigoferae (Borchsenius) ; Ali 1970: 150. Change of combination. Cerococcus indigaferae (Borchsenius) ; Hua 2000: 140. Misspelling of species name.

Type details. Cerococcus roseus SRI LANKA, Trincomali, on undetermined host, Major Yerbury. Depositories: BMNH: lectotype adf (designated by Lambdin & Kosztarab, 1977: 198) (BMNH ~1914-442) plus 6 paralectotype adff on a single slide (lectotype central specimen); also 1/1adf and 1 slide with nymphs. USNM: as for lectotype but “let. 12 Mar.1910 ”, 8 paralectotype slides, 5/6 adff and 3 slides with 15 first-instar nymphs.

Type details. Phenacobryum indigoferae , CHINA, Yunnan, on Indigofera sp. ( Fabaceae ), 6.xi.1957. Depository: ZIAS: 2 slides with type data but not designated as such (I. Gavrilov, pers. comm.).

Material studied. Cerococcus roseus : lectotype and paralectotypes ff: SRI LANKA ( Ceylon), Trincomali, no host, no date, ex coll. F. Moore (BMNH): 1/7adff (Lectotype central specimen; all f–p).

Also: CHINA, intercepted at San Fransisco, on Serissa foetida (Rubiaceae) , 22.x.1997, MWW/TUT (USDA): 2/3adff (g). SRI LANKA, Trincolami, on branches of undetermined tree, 11.ix.1911, Major Yerbury (BMNH): 1/6 first-instar nymphs (fg - these are probably paralectotypes). INDIA, no site, on Moghania (Maughania) macrophylla (Fabaceae) , no date, no coll. (BMNH): 1/2adff (f).

Cerococcus indigoferae : CHINA, gorge near Tsindun city (Yunnan Province), 6.iii.1957, no host, N. Borchsenius (ZIAS, 8–58): 1/bits of two specimens (p) (probably part of type series). It is likely that all other type specimens were deposited in China, including the holotype (I. Gavrilov, pers. comm.). However, the whereabouts of Borchsenius’ material in China is uncertain. None of his slides are present in the Zoological Museum, Chinese Academy of Sciences, where they are thought to have been deposited. Borchseniuus worked with Prof.Wang Ziqing. When Wang Zi-qing died in 1999, his collection was found to have not been deposited in the Zoological Museum. The whereabouts of this collection is currently uncertain and may have been lost (San-an Wu, pers. comm.).

Note: because all C. roseus specimens are poorly cleared, the description is an amalgamation of all seven type specimens. Data for C. indigoferae in [...] below.

Mounted material. Body pear-shaped, 2.5–3.0 [?] mm long, and 2.3–2.6 [?] mm wide.

Dorsum. Eight-shaped pores of 3 sizes: (i) a large pore, each 20 x 12–13 [18 x 12] µm; (ii) an intermediatesized pore, each 8 x 5.6 [10 x 5.5–6.0] µm, with each closed pore almost circular, i.e with outer margins very rounded, and with a distinct waist; both (i) and (ii) abundant and fairly evenly distributed throughout dorsum anterior to cribriform plates, possibly in a swirled pattern in places; largest pores also in a group of 14–20 [6–9] pores on each side of posterior abdominal segments; also (iii) a small pore, each 6 x 4 [6.5 x 3.5] µm, present very sparsely [2–4] towards apex of each stigmatic pore band. Simple pores very sparse, each 2.0–2.5 µm wide. Cribriform plates small and roundish, each 20–25 [15–18] µm wide; with 1 or 2 [2] plates submedially on each side of abdominal segment III and a group of 3 or 4 [1–3] plates (sometimes 2 fused) submedially on on each side of abdominal segment IV, with 1 group just anterior to other; each pore with a fairly broad border and moderate-sized microducts. Dorsal setae extremely few, each setose, showing nothing distinctive. Tubular ducts long, each outer duct 28–30 [25] µm long and 3.0–3.5 [3.0] µm wide, broader than those on venter; abundant throughout. Anal lobes membranous apart from distinctly sclerotized inner margins and small caruncles or reticulations on outer margins near base; each lobe 85 [90] µm long, with a long apical seta, each 195–200 [180] µm long; more apical fleshy setae on dorsal surface stout, each 25–28 [28] µm long; more anterior fleshy setae each 35–38 [28] µm long; ventral setose setae near apex, long, each 38–40 [27] µm; anteroventral setae absent; medioventral setae about 18 [?] µm long; outer margin setae each 16–18 [18] µm long; each lobe with 1 or 2 [3] intermediate-sized 8-shaped pores. Median anal plate triangular, 50–55 [?] µm long and 58–60 [45–48] µm wide at base; apex somewhat serrate or divided. Anal ring with 4 pairs of setae, each 90–105 [90] µm long.

Venter. Eight-shaped pores near margin similar to intermediate-sized pores on dorsum but those more submarginally tending to be asymmetrical, each 10 x 7 [10–11 x 5–6] µm; also present in broad bands across abdominal segments, and with a few along lateral margins of posterior abdominal segments. Simple pores similar to those on dorsum but very sparse. Small bilocular pores, each 5.0–5.5 x 4.0–4.5 [6 x 4.5] µm, frequent medially on head and thorax. Spiracular disc-pores small, each 4.0–6.0 [3–4] µm wide with mainly 5 loculi (but a few with more loculi near apex of some bands), in sparse broad bands 2–4 [2–4] pores wide, each band with 85 [60–80] pores and broadening towards apex; each band also with 2–4 [2–4] smallest 8–shaped pores towards apex; with a small group of 2–4 [6–9] quinquelocular pores near each antenna. Small convex closed pores absent. Multilocular disc-pores, each 7–8 [7] µm wide with mainly 10 loculi, distributed on abdomen as follows: VIII 1 or 2 [0] on each side; in groups of 2–5 [1–3] on each side of segments VII–III, and segment II with 2–10 [?] submarginally; metathorax with 0–2 [?] laterad to each leg stub. Tubular ducts narrower than those on dorsum, each 2.5–3.0 µm wide and perhaps a bit shorter; present throughout. Ventral setae slightly more abundant on posterior abdominal segments than on dorsum but all setose and short; preanal setae each 85 [70] µm long; companion setae quite short. Leg stubs large. Antennae possible showing segmentation, each 50–65 [50] µm long, with 7 or 8 setose and fleshy setae; without either a cone-like point on apex or a setal cavity. Clypeolabral shield 140–150 [150] µm long. Spiracular peritreme each 45–50 [45–52] µm wide.

Comment. Adult females of A. roseus are VERY similar to those of A. indicus , but differ in the shape of the intermediate-sized 8-shaped pores on dorsum, with each closed pore on A. roseus almost round whereas those of A. indicus are elongate with slightly pointed ends. Lambdin and Kosztarab (1977) redescribed A. roseus and, according to their key, considered that the latter species differed from A. indicus in having “spiracular furrows with quinquelocular and 6- and 7-locular pores” and “with less or more than two pairs of cribriform plates on each side of body”. Our study showed that 6+ loculate pores were occasionally present in the stigmatic pore bands of both A. indicus and A. roseus (although they tended to be more frequent in the latter species), and all of the specimens of A. roseus seen here had exactly the same layout of the cribriform plates as in A. indicus . Lambdin and Kosztarab were unable to borrow material of Phenacobryum indigoferae but here we consider that the name P. indigoferae to be a junior synonym of C. roseus . Phenacobryum indigoferae was collected near Tsindun City, Yunnan Province, China, suggesting that A. roseus might be as widespread as A. indicus . The differences between the distribution of the 8-shaped pores on the dorsum in Figs. 40 and 41 are considered to be due to age and environmental factors.

The adult female of A. roseus is characterised by the following combination of character-states: (i) dorsum with three sizes of 8-shaped pores; (ii) large and intermediate-sized 8-shaped pores in fairly dense swirls throughout most of dorsum; (iii) intermediate-sized pores with very rounded closed pores on each side; (iv) smallest 8-shaped pores sparse in apices of each stigmatic pore band; (v) cribriform plates in submedial groups on both abdominal segments IV and III, with three or four plates on each side of IV and one or two on each side of III; (vi) leg stubs large; (vii) posterior stigmatic pore band bifurcated; (viii) multilocular disc-pores very few, restricted to submargins of most abdominal segment and also sometimes metathorax; (ix) a few ventral 8-shaped pores present near clypeolabral shield, and (x) antenna without either a cone-like apex or a shallow setal cavity.

The adult female of A. roseus falls within Group C in the key to species of Antecerococcus and is very similar to A. indicus , and close to A. albospicatus . All three species occur in Sri Lanka and/or India.

Figures

FIGURE 40. Antecerococcus roseus (Green) based on adult females from Sri Lanka. Adult female.

FIGURE 41. Antecerococcus roseus (Green) based on specimens from China identified as C. indigoferae (Borchsenius). Adult female.