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Integrative taxonomy of Abacarus mites (Eriophyidae) associated with hybrid sugarcane plants, including description of a new species.

Authors
  • Duarte, Mércia Elias1
  • de Mendonça, Renata Santos2
  • Skoracka, Anna3
  • Silva, Edmilson Santos4, 5
  • Navia, Denise6
  • 1 Embrapa Recursos Genéticos e Biotecnologia, Brasilia, Distrito Federal, 70770-900, Brazil. , (Brazil)
  • 2 Faculdade de Agronomia e Medicina Veterinária, Universidade de Brasília, Campus Darcy Ribeiro, Brasília, DF, 70297-400, Brazil. , (Brazil)
  • 3 Population Ecology Lab, Faculty of Biology, Institute of Environmental Biology, Adam Mickiewicz University, Uniwersytetu Poznańskiego 6, Poznań, 61-614, Poland. , (Poland)
  • 4 Universidade Federal de Alagoas, Campus Arapiraca, Arapiraca, 57309-005, Brazil. , (Brazil)
  • 5 Universidade Federal de Alagoas, Centro de Ciências Agrárias (CECA), Alagoas, 57100-000, Brazil. , (Brazil)
  • 6 Embrapa Recursos Genéticos e Biotecnologia, Brasilia, Distrito Federal, 70770-900, Brazil. [email protected] , (Brazil)
Type
Published Article
Journal
Experimental and Applied Acarology
Publisher
Springer-Verlag
Publication Date
Jul 01, 2019
Volume
78
Issue
3
Pages
373–401
Identifiers
DOI: 10.1007/s10493-019-00388-y
PMID: 31278610
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Phytophagous mites belonging to the Eriophyoidea are extremely diverse and highly host-specific. Their accurate morphological identification is hampered by their reduced size and simplified bodies and by the existence of cryptic species complexes. Previous studies have demonstrated the urgency of applying multisource methods to accurate taxonomic identification of eriophyoid mites, especially species belonging to the genus Abacarus. This genus comprises 65 species, of which 37 are associated with grasses and four with sugarcane Saccharum (Poaceae). Recently, Abacarus specimens very similar to Abacarus sacchari were collected from the sugarcane crop in Brazil; however, their taxonomic placement was uncertain. In this study, we used an integrative approach to determine whether A. aff. sacchari specimens belong to A. sacchari or constitute a cryptic species. Morphological data were combined with molecular phylogeny based on the nucleotide sequences of three markers, one mitochondrial (COI) and two nuclear (D2 region of 28S and ITS). Morphological differences were observed between A. aff. sacchari, A. sacchari and A. doctus. The phylogenetic relationships among these three taxa and the genetic distances separating them revealed an interspecific divergence. The results of the morphological and molecular methods were congruent and supported the existence of a new species: Abacarus neosacchari n. sp. Duarte and Navia, herein described. This species belongs to the Abacarus cryptic species complex associated with sugarcane in the Americas. The results of this study, presenting the occurrence of multiple Abacarus species associated with sugarcane, contribute to the knowledge on plants and mites diversity by adding up one more clue highlighting that plant hybridization can be an important mechanism contributing to the speciation of plant-feeding arthropods.

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