caa a22 4500 38809317X CHVBK 20180307125257.0 cr unu---uuuuu 161130e199910 xx s 000 0 eng 10.4039/Ent131573-5 doi S0008347X00010191 pii (NATIONALLICENCE)cambridge-10.4039/Ent131573-5 A MORPHOMETRIC APPROACH TO THE TAXONOMY OF THE GENUS CERAMIDA (COLEOPTERA: SCARABAEOIDEA: MELOLONTHIDAE) [Elektronische Daten] The taxonomy of the genus Ceramida Baraud, 1987, some species of which are severe pests, is considered difficult because of a lack of reliable diagnostic characters. We propose a new approach to the taxonomy of this genus by studying the efficacy of morphometric characters for species discrimination employing multivariate analysis. All members of the genus were included in the analysis. The seven morphometric characters considered were all found to be diagnostic at me species level: width of clypeus at base and at mid-length, and length of clypeus, full body, antennal club and stem, and apical segment of maxillary palp. The most informative character is the length of the antennal club relative to body size. This character divides the genus into three morphological groups. The ratios traditionally employed in the taxonomy of this genus cannot be used as discrete characters because there are no gaps in their range of variation. Our discriminant analysis produced several classification functions that serve as a new taxonomic tool to distinguish between morphologically similar species. Eleven species are recognized within the genus and eight new synonymies are proposed. Copyright © Entomological Society of Canada 1999 Sanmartín Isabel Departamento Biodiversidad y Biología Evolutiva (Entomología), Museo Nacional de Ciencias Naturales (C.S.I.C.), cl José Gutiérrez Abascal, 2, 28006 Madrid, Spain Martín-Piera Fermín Departamento Biodiversidad y Biología Evolutiva (Entomología), Museo Nacional de Ciencias Naturales (C.S.I.C.), cl José Gutiérrez Abascal, 2, 28006 Madrid, Spain The Canadian Entomologist Cambridge University Press 131/5(1999-10), 573-592 0008-347X 131:5<573 1999 131 TCE https://doi.org/10.4039/Ent131573-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.4039/Ent131573-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sanmartín Isabel Departamento Biodiversidad y Biología Evolutiva (Entomología), Museo Nacional de Ciencias Naturales (C.S.I.C.), cl José Gutiérrez Abascal, 2, 28006 Madrid, Spain NATIONALLICENCE 700 1- Martín-Piera Fermín Departamento Biodiversidad y Biología Evolutiva (Entomología), Museo Nacional de Ciencias Naturales (C.S.I.C.), cl José Gutiérrez Abascal, 2, 28006 Madrid, Spain NATIONALLICENCE 773 0- The Canadian Entomologist Cambridge University Press 131/5(1999-10), 573-592 0008-347X 131:5<573 1999 131 TCE CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge