Antecerococcus madagascariensis (Mamet) Mamet, 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 : 80-83

Antecerococcus madagascariensis (Mamet) , comb. nov.

( Fig. 29 )

Cerococcus madagascariensis Mamet 1959: 408 –410.

Type details. MADAGASCAR, Bas-Mangoky, Station Agricole, on undetermined host, -. iv.1955, A. Robinson. Depository: MNHN: holotype adf (MNHN 14878-1); also paratype ff: same data as holotype, 6/6adff (MNHN 14878-2 to MNHN 14878-7).

Material studied. Paratypes: MADAGASCAR, Bas-Mangoky Station Agricole, on undetermined host, -. iv.1955, A. Robinson (MNHN): 2/3 adff (f).

Note. Description made from all three specimens but none mounted dorsoventrally and exact layout of some structures uncertain.

Mounted material. Body roundly pear-shaped, 1.2–1.5 mm long, and 0.9–1.55 mm wide.

Dorsum. Eight-shaped pore structure distinctive, with the two halves joined on one side; of 3 or 4 sizes: (i) largest pore, each 13–15 x 8–9 µm, frequent in a fairly broad marginal band and in 3 broad transverse bands, 1 band approximately dorsad to anterior spiracles, 1 dorsad to posterior spiracles and a third band on anterior abdominal segments plus a median longitudinal band anteriorly; (ii) intermediate pores variable in size, larger pores each about 10 x 6.5 µm, mainly found near type (i) pores, and smaller intermediate-sized pores, each 8.0–8.5 x 5.0–5.5 µm, about as abundant as largest pores, present elsewhere on dorsum apart from medially on posterior abdominal segments, where replaced by (iii) smallest pores, each 6 x 3.0–3.5 µm, present on posterior abdominal segments; intermediate and smallest pores not intermingling with largest pores; with 2 or 3 small intermediate-sized pores associated with apex of each stigmatic pore band. Simple pores, each 2.0–2.5 µm wide, rare. Cribriform plates misshappen, small, each mainly 13–15 µm wide, in 2 groups of 4 or 5 submedially on each side of abdominal segment IV; each plate with a broad border and moderate-sized micropores. Dorsal setae showing nothing distinctive. Tubular ducts with each outer ductule 20–22 µm long and about 2.5 µm wide, slightly broader than those on venter; abundant throughout. Anal lobes mainly membranous, but with sclerotized inner margins; each lobe with a long apical seta, all broken but at least 140 µm long; fleshy seta on dorsal surface near apex short, each 13–15 µm long; fleshy seta near centre of each dorsal surface 20–25 µm long; ventral setose seta near apical setae each 12–14 µm long; medioventral or outer margin setae each about 7 µm long; each lobe possibly without 8- shaped pores. Median anal plate blunt, 33–35 µm long, 33–35 µm wide at base. Anal ring with 4 pairs of setae, each about 50 µm long.

Venter. Eight-shaped pores similar to intermediate-sized pores on dorsum, each 10 x 5.5 µm, in a sparse, fairly broad submarginal band; transverse bands anterior to each band of multilocular disc-pores very sparse or even absent. Simple pores rare. Small bilocular pores, each about 4.0 x 4.5 µm, frequent medially on head and thorax, not extending onto anterior abdominal segments. Spiracular disc-pores small, each 4–5 µm wide (smallest near spiracles), mainly with 5 loculi, each band narrow near spiracles but broadening on dorsum; posterior bands bifurcated; each band with 70–80 pores + 2 or 3 intermediate-sized 8-shaped pores associated with apex of each band; also with 1 quinquelocular disc-pore near each antenna. Small convex closed pores, each 3–5 µm wide, present in a broad band between anterior and posterior leg stubs, each band with 45–60 pores. Multilocular discpores, each 6–7 µm wide with mainly 10 loculi, in sparse transverse bands mainly 1 pore wide across abdominal segments, as follows: abdominal segment VIII 0; VII 0 or 1 on each side submarginally, none medially; VI a line of 6–9 medially; V 1–5 submarginally + 9–14 medially; IV 1–4 submarginally + 11–25 medially; III 4–8 submarginally + 18 or 20 medially; II 6–11 submarginally + 11 or 12 medially; also with 0–2 laterad to each leg stub on metathorax but none medially. Tubular ducts slightly narrower than those on dorsum, abundant throughout. Ventral setae showing nothing significant; preanal setae each 55–60 µm long; companion setae short. Leg stubs well developed. Antennae unsegmented, each 31–40 µm long, 23–27 µm wide, without either a sclerotized conelike point or a deep setal cavity; with about 7 or 8 setae. Clypeolabral shield about 125 µm long. Spiracular peritremes each 26–27 µm wide.

Comment. The above description is similar to that of Lambdin and Kosztarab (1977) except that (i) they considered the convex closed pores on the venter to be multilocular disc-pores, and (ii) they found only two sizes of 8-shaped pores on the dorsum.

Adult females of A. madagascariensis are somewhat similar to A. theydoni and A. yemenicus in having a broad band of small convex closed pores but these pores are much more abundant in the current species, on which they also form a group laterad to each metathoracic leg stub. Adult females of A. madagascariensis also have the following combination of character-states: (i) dorsum with three or four sizes of 8-shaped pores; (ii) largest 8- shaped pores restricted to margin and three broad transverse bands; (iii) largest 8-shaped pores absent from margins of posterior abdominal segments; (iv) smallest 8-shaped pores restricted to medially on posterior abdominal segments; (v) intermediate-sized 8-shaped pores present elsewhere but not intermingling with largest or smallest pores; (vi) cribriform plates in a submedial group of four or five on each side of abdominal segment IV; (vii) leg stubs present; (viii) posterior disc-pore band bifurcated; (ix) multilocular disc-pores sparse, in transverse bands across abdominal segments II–VI and laterad to metathoracic leg stubs; (x) small convex closed pores present in a band between pro- and metathoracic leg stubs; and (xi) antennae without a cone-like apex and setal cavity.

The adult female of A. madagascariensis falls within Group D in the key to species of Antecerococcus , and keys out close to A. theydoni and A. yemenicus .

Figures

FIGURE 29. Antecerococcus madagascariensis (Mamet). Adult female.