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Are Phenacoccus solani Ferris and P. defectus Ferris (Hemiptera: Pseudococcidae) distinct species?

Evangelia Chatzidimitriou1, Mauro Simonato2, Gillian W Watson3

  • 1University of Padova, Dipartimento di Agronomia, Animali, Alimenti, Risorse Naturali e Ambiente DAFNAE, viale dell'Università 16, 35020 Legnaro, Italy.;

Zootaxa
|July 11, 2016
PubMed

Insights

Phenacoccus defectus Ferris is now considered the same species as Phenacoccus solani Ferris. Morphological and molecular analyses confirm they are not distinct species, establishing Phenacoccus solani as the valid name.

Area of Science:

  • Entomology
  • Taxonomy
  • Molecular Biology

Background:

  • Phenacoccus solani and Phenacoccus defectus are morphologically similar Nearctic mealybug species.
  • Distinguishing between these species using only adult female morphology is challenging.

Purpose of the Study:

  • To resolve the taxonomic identity of Phenacoccus solani and Phenacoccus defectus.
  • To determine if these two species represent distinct taxa or a single species.

Main Methods:

  • Canonical variates morphological analysis of 199 specimens.
  • Molecular analysis of the COI and 28S genes.
  • Comparison of morphological variation and genetic data.

Main Results:

  • Morphological analysis indicated a continuous range of variation, supporting synonymy.
  • Molecular analysis revealed that Phenacoccus solani and Phenacoccus defectus cluster within the same clade.
  • Both methods failed to support P. defectus as a distinct species.

Conclusions:

  • Phenacoccus defectus is synonymized under Phenacoccus solani (syn. n.).
  • This taxonomic revision clarifies the status of these two mealybug species.
  • The study highlights the utility of integrated morphological and molecular approaches in taxonomy.

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