Coccus cambodiensis Takahashi, 1942

Cao, Tong, Watson, Gillian W., Hodgson, Chris J., Jing, Qi & Feng, Ji-Nian, 2022, The genera Coccus and Prococcus (Hemiptera: Coccomorpha: Coccidae) in China with two new combinations and descriptions of two new species, Zootaxa 5087 (1), pp. 112-128 : 114

Coccus cambodiensis Takahashi, 1942

( Figs 1 and 2 )

The species is known from Kampuchea (García-Morales et al. 2016; Ali 1971) and Hainan Province, China ( Tang 1991) on Ficus retusa (Moraceae) . Tang (1991) remarked that it is morphologically close to P. acutissimus , the type species of the monotypic genus Prococcus .

Diagnosis based on Takahashi (1942) and Tang (1991): Body of adult female narrow, elongate to elongate oval, pointed at anterior and posterior ends, 2.0– 2.5 mm long, 1.0– 1.7 mm wide; young insects in life yellow. Dorsum with derm slightly sclerotized in older females, with well-developed dermal areolations; setae cylindrical with bluntly rounded apices; dorsal tubular ducts absent; submarginal tubercles numbering 14 around body; preopercular pores in an elongate group anterior to anal plates; anal plates each triangular, together quadrate, length of posterior margin almost equal to anterior margin; each plate with 1 subdiscal seta and 2 or 3 apical setae. Marginal setae slender with pointed apices; stigmatic spines numbering 3, median spine longest, straight or slightly curved, cylindrical with a bluntly pointed or rounded apex; lateral spines conical with rounded apices. Venter with antennae reduced to 2 or 3 segments each, mostly 2 (2 segments shown in Takahashi’s (1942) illustration—see Fig. 2 and description and Tang’s (1991) description, but 3 segments shown in his illustration—see Fig. 1 ); inter-antennal setae absent or numbering 2 pairs (text in Tang (1991) says they are absent, but his illustration shows 2 pairs of short setae—see Fig. 1 ); submarginal setae present; long pregenital setae numbering 3 pairs; legs reduced, with tibio-tarsus fused, claw digitules usually not discernible; ventral tubular ducts absent; multilocular disc pores very few, present anterior to anal opening, but their frequency and number of loculi are neither mentioned nor illustrated by either Takahashi (1942) or Tang (1991); abdominal segmentation obscure.

Comments. Coccus cambodiensis differs from P. acutissimus as follows (character-states for P. acutissimus given in brackets): (i) body tapering at both ends, each end rounded (tapering at both ends, each end more-or-less pointed); (ii) dorsal derm with numerous areolations (small round or oval clear areas present on the dorsum ( Gill et al. 1977)); (iii) dorsal setae slender and cylindrical with bluntly rounded apices (robust, spine like and slightly tapering with pointed or blunt apices); (iv) claw digitules not discernable, possibly absent (claw digitules unequal, with 1 thick and 1 thin); (v) antennae mainly 2 segmented (mainly 3 segmented); and (vi) inter-antennal setae absent (2 pairs of inter-antennal setae present between antennal bases).

Based on the shared morphological characters listed above, C. cambodiensis is obviously much closer to P. acutissimus than to C. hesperidum , the type species of Coccus . It is here considered to be congeneric with P. acutissimus , and is transferred to the genus Prococcus as Prococcus cambodiensis ( Takahashi, 1942) , comb. n.

Figures

FIGURE 1. Adult female of Prococcus cambodiensis (Takahashi, 1942), reproduced from Tang (1991: Fig. 18), published by Shanxi United Universities Press.

FIGURE 2. Adult female of Prococcus cambodiensis (Takahashi, 1942), reproduced from Takahashi (1942: 18, Fig. 8). 1. Antenna. 2. Hind leg. 3. Dorsal reticulations and seta. 4. Anal plate. 5. Stigmatic cleft and margin.