Coccus longulus (Douglas)

Family

Coccidae

Common name

Long brown scale

Field characters

Body usually elongate oval; moderately convex in lateral view; body yellow with brown mottling in young females, becoming completely brown at maturity; without an obvious wax covering; ovisac absent. Occurring on leaves, branches, and twigs of host plant. Males absent; eggs hatch within body of female.

Validation characters

Dorsal setae filamentous, apically acute, often slightly curved; tubular ducts absent. Other characters: claw without denticle; claw digitules equal; 3 pairs of prevulvar setae (posterior pair often obscured by anal plates); 9-19 submarginal tubercles around body margin; marginal setae usually slender, apices simple, occasionally weakly fimbriate; with tibio-tarsal sclerosis; antennae 8-segmented; anal plates with posterior margin slightly longer than anterior margin; each anal plate with 3 apical setae, and 1 subdiscal seta; with 3 subapical setae on each plate; anal fold with 6 to 9 fringe setae; stigmatic setae differentiated from other marginal setae, middle seta conspicuously longer than lateral setae; multilocular pores normally with 7 loculi; multiloculars usually confined to vulvar area, 1 or 2 pores on segments 6 or 7; preopercular pores in small numbers, in narrow longitudinal line.

Comparison

Coccus longulus is unique among the species most commonly intercepted at U. S. ports-of-entry by having a subdiscal seta on the anal plates; 8-segmented antennae; slender, curved dorsal setae; and no tubular ducts.

U.S. quarantine notes

This species was intercepted 32 times on a variety of hosts at U. S. ports-of-entry between 1995 and 2012, with specimens originating from Australia, Belize, Cook Islands, Costa Rica, Cote D`Ivoire, El Salvador, Ghana, Grenada, Guatemala, Hawaii, Honduras, Jamaica, Mexico, The Netherlands, The Philippines, South Africa, Thailand, The United Kingdom of Great Britain and N. Ireland, and Vietnam. We also have examined specimens taken in quarantine from American Samoa (unknown host); Barbados (unknown host); Belize (Aglaonema, Codiaeum); Bermuda (Codiaeum, Laurus); China (Litchi); Costa Rica (Codiaeum, Oncidium); Cuba (Erythroxylon); Dominican Republic (Annona, Citrus); Ecuador (Annona, Caladium); England (Ricinus); Fiji (Hibiscus); Grenada (Mangifera); Hawaii (Anthurium, Codiaeum, Hibiscus, Rubus); Honduras (Spathiphyllum); India (Musa); Jamaica (Annona, Mentha); Japan (Anthurium, Codiaeum); Mexico (Codiaeum, Epidendrum, Vitis); Nigeria (unknown host); The Philippines (Codiaeum, Rosa); Puerto Rico (Annona, Monstera); Samoa (Casuarina); Sri Lanka (Cassia); Thailand (Durio, Mangifera); Truk Islands (Excoecaria).ScaleNet includes hosts in over 50 plant families from 50+ countries worldwide in all zoogeographic regions. The greatest concentration of hosts appears to be in the Fabaceae. Two species of Coccus other than C. capparidis Green, C. hesperidum Linnaeus, C. longulus, C. moestus De Lotto , C. pseudohesperidum (Cockerell) and C. viridis (Green) have been taken at U. S. ports-of-entry, C. alpinus De Lotto (Brazil, on Coffea) and C. celatus De Lotto (The Philippines, on Dimocarpus, Lansium and Synsepalum).

Important references

BenDov1977; ElMinsMo1976, HamonWi1984; GillNaWi1977; WilliaWa1990.

Scalenet catalog and citation list

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