Revision of the genus Chordodes (Gordiida, Nematomorpha) from Africa. II. Ultrastructural redescription of C. africanus Sciacchitano, 1933, C. hawkeri Camerano 1902; C. sandoensis, Sciacchitano 1937; C. schoutedeni, Sciacchitano 1933 and reinterpretation of Chordodes butensis Sciacchitano, 1937 Author Zanca, Fernanda Facultad de Ciencias Naturales y Museo. Paseo del Bosque S / N 1900 La Plata, Argentina & Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) Buenos Aires, Argentina. Author Schmidt-Rhaesa, Andreas Evolutionary Biology, University Bielefeld PO Box 10013133501 Bielefeld Germany. Author Villalobos, Cristina De Facultad de Ciencias Naturales y Museo. Paseo del Bosque S / N 1900 La Plata, Argentina & Comisión de Investigaciones Científicas Buenos Aires, Argentina. E-mail: villalo @ fcnym. unlp. edu. ar Author Achiorno, Cecilia Facultad de Ciencias Naturales y Museo. Paseo del Bosque S / N 1900 La Plata, Argentina text Zootaxa 2006 2006-05-01 1191 1191 49 59 journal article 1175­5334 DC9B239F-A883-4F55-B756-F67C0F757846 [ Chordodes butensis Sciacchitano, 1937 ] ( Figure 1E ) 1937. Chordodes butensis Sciacchitano. Rev. Zool Bot. Afr. 30: 145. Holotype : 1male (AMT 1429) Type locality : Democratic Republic of the Congo , Buta Material examined : Holotype SEM midbody Comments : In the original description, Sciacchitano (1937) described the cuticle of C. butensis with four areolar types; none of these areolar types are corresponding with crowned areoles which are the characteristic areoles of the genus Chordodes . In 1958, Sciacchitano widens the description of the cuticle giving 4 areolar types among which he describes areoles with short filaments (crowned areoles). A reinvestigation by SEM of the holotype ( Fig. 1E ) revealed only three areolar types are present, which resemble the ones in C. africanus . We therefore regard C. butensis as a synonym of C. africanus .