Antecerococcus gallicolus (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 : 54-56

Antecerococcus gallicolus (Mamet) , comb. nov.

( Fig. 17 )

Cerococcus gallicolus Mamet 1959a: 406 –408.

Type details. MADAGASCAR, Faux Cap, on Euphorbia stenoclada , -. xii.1951, R. Paulian. Depository: MNHN: holotype and paratype adff (holotype on right: MNHN 14877-1); also paratype ff: 3/4adff (MNHN 14877-2: 2adff), MNHN 14877-3: 1adf), MNHN 14877-4: 1 adf)).

Material studied. Paratypes: MADAGASCAR, Faux Cap, on Euphorbia stenoclada (Euphorbiaceae) , -. xii.1951, R. Paulian (MNHN): 2/3adff (f).

Note: description taken from two best specimens.

Mounted material. Body roundly pear-shaped, 2.1–2.5 mm long, and 1.9–2.0 mm wide.

Dorsum. Eight-shaped pores of 4 sizes: (i) largest pore, each 18 x 13 µm, in line around margin, and in a line of 5 or 6 on each side of posteriormost abdominal segments; most large pores with an associated simple pore; (ii) a slightly smaller large pore, each 13 x 8 µm, abundant throughout most of dorsum in a whorl-like pattern but absent posterior to about abdominal segment III; most with an associated simple pore; (iii) an intermediate-sized pore, each 8 x 5 µm, as for previous-sized pore but also sparse on posterior abdominal segments; and (iv) a minute pore, 6 x 3 µm, with 1–4 in apical group of each stigmatic pore band. Simple pores, each 2.0–2.5 µm wide, abundant throughout, usually with 1 associated with larger 8-shaped pores. Cribriform plates roundish, small, each mainly 9– 11 µm wide, in a dispersed submedial group of 7–10 on each side of abdominal segment IV; each with a very broad border and moderately large micropores. Dorsal setae stoutly setose but otherwise showing nothing distinctive. Tubular ducts with each outer duct about 20 µm long, about 3 µm wide, subequal to or broader than those on venter; abundant throughout. Anal lobes mainly membranous, but with sclerotized inner margins; each lobe about 65 µm long with a long apical seta, all broken but at least 150 µm long; fleshy setae near apex on dorsal surface short, each 13–15 µm long, more basal fleshy setae each 21–25 µm long; ventral setose seta near apical setae each 25 µm long; medioventral setae absent; outer margin setae each about 10 µm long; 8-shaped pores absent on both lobes. Median anal plate with rather a square apex, 25–35 µm long, 30–40 µm wide at base. Anal ring with 3 pairs of rather short setae, each 35–45 µm long.

Venter. Eight-shaped pores clearly somewhat larger than intermediate-sized pores on dorsum, sometimes asymmetrical, in a sparse, narrow submarginal band and also very sparse anterior to each band of multilocular discpores on abdomen. Simple pores similar to those on dorsum, mainly associated with 8-shaped pores in a narrow band around margin. Small bilocular pores, each about 6.0 x 4.5 µm, frequent medially on head and thorax but extending onto anterior abdominal segments and also further laterally than on many other species. Spiracular discpores small, each 3–5 µm wide (smallest near spiracles), mainly with 5 loculi, in non-bifurcated bands mainly 2–5 pores wide but widening slightly at apex on dorsum; with 45–60 pores in each band; apex of each band with 1–4 minute 8-shaped pores; also with 1 or 2 quinquelocular disc-pores near each antenna. Multilocular disc-pores, each 5–6 µm wide with 5–8 loculi, very sparse in transverse rows, as follows: abdominal segment VIII 0; VII 1 or 2 on each side submarginally; VI 7 or 8 in a sparse line across segment; V 6–8 in a sparse line across segment; IV 4–6 across segment; III with a single pore medially; absent on metathorax. Small convex closed pores absent although a few simple pores present near spiracles. Tubular ducts slightly narrower than those on dorsum. Ventral setae showing nothing significant; preanal setae each 46–50 µm long; companion setae short. Leg stubs absent. Antennae unsegmented, each 15–45 µm long and 25–30 µm wide, with about 7 or 8 setose and fleshy setae, a minute cone-shaped point and a distinct setal cavity. Clypeolabral shield about 145 µm long. Spiracular peritremes each 35–38 µm wide.

Comment. The above description is similar to that of Lambdin and Kosztarab (1977).

Adult females of A. gallicolus are distinctive, with the following combination of character-states: (i) dorsum with four sizes of 8-shaped pore; (ii) largest 8-shaped pores forming a narrow marginal band; (iii) remaining 8- shaped pores in swirls throughout most of rest of dorsum; (iv) apex of each stigmatic band with 1–4 minute 8- shaped pores; (v) cribriform plates in submedial groups of 7–9 on each side of abdominal segment IV; (vi) simple pores rather abundant throughout dorsum and posterior venter, mostly associated with larger 8-shaped pores; (vii) leg stubs absent; (viii) posterior stigmatic bands non-bifurcate; (ix) multilocular disc-pores very sparse, with fewer than 10 in each segmental line; (x) all multilocular disc-pores with fewer than eight loculi; (xi) anal ring with six setae; (xii) ventral bilocular pores extending posteriorly onto abdominal segment III and laterally past spiracles, and (xiii) each antenna with a large fleshy seta arising from a setal cavity laterally.

The adult female of A. gallicolus falls within Group A in the key to species of Antecerococcus , and keys out close to A. philippiae , A. fradei and A. dumonti .

Figures

FIGURE 17. Antecerococcus gallicolus (Mamet). Adult female.