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Biologia

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Volume 67, Issue 5 (Oct 2012)

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Morphological separation of aphid species Cryptomyzus leonuri Bozhko, 1961 and Cryptomyzus alboapicalis (Theobald, 1916) (Hemiptera: Sternorrhyncha: Aphididae)

Jekaterina Bašilova
  • Department of Zoology, Faculty of Natural Sciences, Vilnius University, M. K. Čiurlionio 21/27, LT-03101, Vilnius, Lithuania
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/ Rimantas Rakauskas
  • Department of Zoology, Faculty of Natural Sciences, Vilnius University, M. K. Čiurlionio 21/27, LT-03101, Vilnius, Lithuania
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Published Online: 2012-08-23 | DOI: https://doi.org/10.2478/s11756-012-0084-z

Abstract

Aphids of the species Cryptomyzus alboapicalis (Theobald, 1916) and Cryptomyzus leonuri Bozhko, 1961 are very similar morphologically, although exploit different host plants (Lamium album and Leonurus cardiaca, respectively). Morphological characters proposed for the separation of this species couple in the identification key to European Cryptomyzus species appeared to be of little discriminatory power when applied to apterous viviparous females from clonal lineages, whilst alate viviparous females of C. leonuri were not included in the key at all. The aim of this study was to find reliable morphological characters and their combinations for the separation of apterous and alate viviparous females of C. alboapicalis and C. leonuri. Forward stepwise discriminant analysis based on characters without statistically significant (P < 0.05) correlation (|r| ≥ 0.50) with body length resulted in canonical functions enabling correct classification of 95–100% of specimens from clonal lineages involved in the analysis with a priori specified group membership. The post hoc classification gave 95–100% correct identification of individuals from clonal and 85–100% from field-collected samples. The discriminative values of single morphological characters and canonical functions are discussed and modified key for the morphological identification of C. alboapicalis and C. leonuri apterous and alate viviparous females is suggested.

Keywords: aphids; Cryptomyzus alboapicalis; Cryptomyzus leonuri; morphological separation; morphometric analysis; measurements; discriminant analysis

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About the article

Published Online: 2012-08-23

Published in Print: 2012-10-01


Citation Information: Biologia, ISSN (Online) 1336-9563, ISSN (Print) 0006-3088, DOI: https://doi.org/10.2478/s11756-012-0084-z.

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© 2012 Slovak Academy of Sciences. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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