Antecerococcus oumeensis Hodgson & Williams

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 : 90-92

Antecerococcus oumeensis Hodgson & Williams , sp. nov.

( Fig. 33 )

Material studied. Holotype and paratypes: IVORY COAST ( Côte d’Ivoire), Oumé, on Terminalia ivorensis (Combretaceae) , 4.xii.1969, F. Brunk (BMNH): 1/3adff (fg, holotype adult female specimen clearly marked, nearest specimen to name label).

Note: slide-mounted specimens all with wax covering much of dorsum, obscuring some features. Therefore, details are taken from all specimens.

Mounted material. Body roundly pear-shaped; large, 2.1–2.35 mm long, 1.8–2.0 mm wide.

Dorsum. Eight-shaped pores of 3 sizes: (i) largest pores, each 16–22 x 11.5–12.5 µm, present in a swirled pattern throughout dorsum anterior to cribriform plates, but with a few clear areas without pores; also with a line of 6–8 on each side of posterior abdominal segments; (ii) a significantly smaller intermediate-sized pore, each 7.5– 11.5 x 6.5–7.5 µm, about as abundant as largest pores and intermingled amongst them but also present where large pores absent; these pores variable in size but smallest on posterior abdominal segments, where each 7.5–8.0 x 5 µm; and (iii) smallest pores, each 6.0–6.5 x 3.0–3.5 µm, present as a curved line of 4 or 5 pores passing through apex of each stigmatic pore band. Simple pores small, each 3.0–3.5 µm wide, sparse. Cribriform plates, each round and 10–13 µm wide, in an elongate cluster of 4 plates submedially on each side of abdominal segment IV; each with a broad border and quite large micropores. Dorsal setae few, each setose; showing nothing distinctive. Tubular ducts with each outer ductule 26–28 µm long, inner ductules about 10 µm wide; abundant throughout. Anal lobes with narrow areas of sclerotization on each inner margin, without obvious folding; each anal lobe about 75 µm long; apical setae all broken; more basal fleshy setae on dorsal surface each 26–27 µm long, more apical fleshy setae generally bent, each 21–25 µm long; ventral setae near apex stoutly setose, each about 20 µm long; medioventral setae absent; outer margin setae each about 8 µm long; each lobe with 2 small 8-shaped pores. Median anal plate bluntly triangular with a slightly serrate margin; 25–30 µm long and 35–50 µm wide at base. Anal ring with 4 pairs of setae, each about 75 µm long.

Venter. Derm membranous. Eight-shaped pores: large and intermediate pores similar to those on dorsum, present in a submarginal band on head and thorax, particularly near stigmatic pore bands, becoming replaced submarginally by ventral pores similar to intermediate-sized pores on dorsum, each about 7.5 x 3.0–4.0 µm; and in sparse segmental bands 1 or 2 pores wide across abdominal segments III–VIII; a few also present medially near clypeolabral shield. Simple pores sparse. Small bilocular pores oval, each about 5– 6 x 4 µm, frequent medially on head and thorax. Spiracular disc-pores each 4-6 Μm wide with mainly 5 loculi, largest near apex; each band quite long, broad near each spiracle, narrowing slightly towards margin and then broadening abruptly at apex; posterior bands bifurcated; each band with a total of about 150 pores including a group of at least 21 near each peritreme; each band also with 4 or 5 small 8-shaped pores more or less in a curved line through apex; 4–6 quinquelocular disc-pores present laterad to each antenna. Small convex closed pores absent. Multilocular disc-pores, each 6.0–7.5 µm wide, mainly with 10 loculi, in transverse bands mainly 1–2 pores wide as follows: abdominal segment IX 1 on each side; VIII 4 or 5 on each side; VII with 1–10 on each side of vulva; VI 3–8 submarginally + 24–31 medially; V 3–5 submarginally + 27–32 medially; IV 5–7 submarginally + 20–35 medially; III 3 or 4 submarginally + 16 or 17 medially, and II 4–6 submarginally and 15 medially; also with 2–7 laterad to metathoracic leg subs and 2–5 medially; also with about 8 in a line extending medially from posterior spiracle and 1 or 2 medially from anterior spiracle; plus 1 on each side of clypeolabral shield. Tubular ducts similar to those on dorsum but narrower; present throughout. Ventral setae showing nothing distinctive; preanal setae each 50–60 µm long; smaller companion seta short, about 7 µm long. Leg stubs small. Antennae unsegmented, each 33–35 µm long, 23–25 µm wide, with 7 or 8 fleshy setae; each without either a conical point on apex or a shallow setal cavity. Clypeolabral shield 130–140 long. Spiracular peritremes each 35–40 µm wide.

Comment. Adult females of A. oumeensis Hodgson & Williams sp. nov. are somewhat similar to those of A. gabonensis but differ in having no small convex closed pores on the venter near each spiracle. The main characteristics of A. oumeensis are as follows: (i) dorsum with three sizes of 8-shaped pore; (ii) large and intermediate-sized 8-shaped pores forming loose swirls throughout most of dorsum; (iii) smallest 8-shaped pores more or less in a curved line through apex of each stigmatic pore band; (iv) margins of posterior abdominal segments each with 6–8 large 8-shaped pores; (v) cribriform plates in an elongate group of four on each side of abdominal segment IV; (vi) leg stubs present; (vii) posterior stigmatic pore bands bifurcated; (viii) multilocular disc-pores in transverse rows across all abdominal segments and metathorax; (ix) multilocular disc-pores also present in a loose line mesad to each spiracle, and (x) antennae without either a cone-like apex or setal cavity.

The adult female of A. oumeensis falls within Group D in the key to species of Antecerococcus , and keys out close to A. andamanensis , A. passerinae and A. thesii .

Name derivation: oumeensis refers to Oumé, the locality in the Ivory Coast ( Côte d’Ivoire) where this species was collected, plus the Latin suffix – ensis meaning origin or place.

Figures

FIGURE 33. Antecerococcus oumeensis Hodgson & Williams, sp. nov. Adult female.