Review of the Eriococcidae (Hemiptera: Coccomorpha) infesting Fabaceae in Argentina, with descriptions of three new species of Acanthococcus Signoret Author González, Patricia Author Claps, Lucía E. Author Juárez, Andrea Author Moreno, Diego text Zootaxa 2017 4232 1 41 57 journal article 36547 10.11646/zootaxa.4232.1.3 5363e2a3-ce92-40df-8518-384275ad9570 1175-5326 292749 21D49668-D5AE-48B5-9C92-5C4F06D49F3F Acanthococcus siambonensis González & Nicosia Acanthococcus siambonensis González & Nicosia 2014: 4 –6. Material examined. Holotype : Adult female. Argentina , Tucumán , Raco , El Siambón ( 26°42'13" S , 65°26'33" W ), on Acacia sp., XI/1991 , Willink col. 1(1) ( IFML ) . Paratypes: 4 (8 + 1 second-stage nymph (undetermined sex), with same collection data (IFML). Additional material examined. Argentina , Tucumán , Burruyacú , Piedra Tendida ( 26°26'27" S , 64°55'34" W ), on Acacia aroma , 19/VIII/1989 , M.C.G. Willink col., 3(5) ( IFML ) . Entre Ríos , Federal , 1 km of Arroyo Federal Chico ( 30°58'14" S , 58°50'15" W ), on Acacia caven , 1/XI/1998 , L. Claps col. 4(9) ( IFML ) . Diagnosis. Slide-mounted adult female with dorsal surface with spinose setae; cruciform pores present in cephalic and thoracic regions. Margin with 1seta on either side of each abdominal segment. Ventral surface with flagellate and enlarged spinose setae; cruciform pores abundant along entire margin and submargin; multilocular pores, each with 7 loculi, present on abdomen; metacoxa with approximately 70 pores on both surfaces (González & Nicosia 2014). Distribution. Argentina , Neotropical region, Chaco subregion, Chaco and Pampa provinces.