1364 Accepted by C. Schaefer: 31 Oct. 2006; published: 23 Nov. 2006 67 ZOOTAXA ISSN 1175-5326 (print edition) ISSN 1175-5334 (online edition) Copyright © 2006 Magnolia Press Zootaxa 1364: 67–68 (2006) www.mapress.com/zootaxa/ Taxonomic notes on the genus Gonycentrum Bergroth (Hemiptera: Tingidae) The monotypic phatnomatine genus Pampacader (with its single species P . cicchinoi) was recently described from Argentina (Carpintero & Montemayor 2005) as the first genus of the tribe Phatnomatini recorded from Buenos Aires province and the third (after Phatnoma Fieber and Eocader Drake & Hambelton) known from Argentina. The genus was then soon compared with Ambarcader Perrichot, Nel, Guilbert & Néraudeau, described from the Lower Cretaceous amber of France, in a discussion of the systematic position of this new fossil genus within the family (Perrichot et al. 2006). However, all the characters as well as the figures given for Pampacader cicchinoi in its original description (Carpintero & Montemayor 2005) have clearly demonstrated that it is congeneric with Gonycentrum coronatum (Fieber, 1844), a species perhaps unknown to Carpintero & Montemayor (op. cit.) because of its Old World distribution. Therefore, the following taxonomic changes are proposed here: Gonycentrum Bergroth, 1898 (=Pampacader Carpintero & Montemayor, 2005 new synonym); Pampacader cicchinoi Carpintero & Montemayor, 2005 = Gonycentrum cicchinoi (Carpintero & Montemayor, 2005) new combination. Here we also give all data on the distribution of the genus Gonycentrum, and a key to all its species. Gonycentrum Bergroth Gonycentrum Bergroth, 1898: 9. Type species: Teleia coronata Fieber, 1844, monobasic. Pampacader Carpintero & Montemayor, 2005: 58. Type species: Pampacader cicchinoi Carpintero & Mon- temayor, 2005, new synonym. Gonycentrum cicchinoi (Carpintero & Montemayor, 2005), new combination Pampacader cicchinoi Carpintero & Montemayor, 2005: 59 (Argentina). A list of known species of Gonycentrum 1. coronatum (Fieber, 1844) [India (“Ostindien”), Sri Lanka (Alawala Province, Uwa Province)]; 2. chadense Duarte Rodrigues, 1978 [Chad (Bebedja), Sudan (Wad Medani)]; 3. heissi B. Lis, 2006 [Madagascar (Antsiranana Province)]; 4. cicchinoi (Carpintero & Montemayor, 2005) [Argentina (Buenos Aires Province)]. Key to known species of Gonycentrum (modified from B. Lis, 2006) 1. Costal area of hemelytron triseriate along its entire length; paranota bilobate, their lateral mar- gins distinctly sinuate ................................................................................................ heissi B. Lis - Costal area at best biseriate; paranota not forming lobes, their lateral margins almost straight or slightly sinuate ........................................................................................................................... 2 2. Subcostal area irregularly triseriate; posterior pronotal margin broadly rounded, slightly pro-