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Oral-rim tubular ducts absent ventrally from head and anterior thorax; multilocular pores present on lateral areas of some abdominal segments; multilocular pores on segments IV-VIII, absent from thorax and head; cluster of oral-collar tubular ducts near anterior spiracle; oral collars absent laterad of mid pair of legs; circulus normally present, small, rarely absent; cerarii with 2 conical setae; 8-17 pairs of cerarii; oral-rim tubular ducts covering dorsum, absent from segment VIII; anal bar present.
Paracoccus herreni is similar to P. ferrisi by having oral collars near the anterior spiracle, dorsal oral-rim tubular ducts scattered over surface, multilocular pores absent from thorax. Paracoccus herreni can be distinguished (characters of P. ferrisi are in parentheses) by usually lacking ventral oral rims on the thorax and head (present), and multilocular pores present on lateral areas of some abdominal segments (present or absent).
This species was intercepted at U. S. ports-of-entry 11 times between 1995 and 2012, with specimens originating from Colombia, Costa Rica, El Salvador, and Mexico. We also have examined specimens taken in quarantine from Colombia (Protea); El Salvador (Fernaldia); Mexico (Ipomea, Punica). ScaleNet lists hosts in 2 plant families, Euphorbiaceae and Verbenaceae, but it is most commonly intercepted on Fernaldia (Apocynaceae – Dogbane family). ScaleNet distribution records for P. herreni include Mexico in the Nearctic zoogeographic region and Colombia, French Guiana and Nicaragua in the Neotropics. Several species of Paracoccus other than P. brunerae (Brain), P. ferrisi Ezzat & McConnell, P. herreni, P. interceptus Lit, P. lycopersici Ezzat & McConnell,P. marginatus Williams & Granara de Willink, P. mexicanus Ezzat & McConnell and P. solani Ezzat & McConnell have been intercepted at U. S. ports-of-entry including: P. hamoni Williams and Granara de Willink (Mexico, on Cephalocereus); P. circuliprivis Ezzat and McConnell (Mexico, on Thomsoniella); P. invectus Williams (Thailand and India, on orchids, including Dendrobium); and P. reductus Ferris (Mexico, on Yucca).
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