When morphology and DNA are discordant

Integrated taxonomic studies on the Eisenia fetida/andrei complex from different parts of Iran (Annelida, Clitellata: Megadrili)

Robabeh Latif, Masoumeh Malek, C. Csuzdi

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Recent studies have indicated the presence of high cryptic diversity in some clitellate species. Eisenia fetida/andrei is an earthworm species complex that is commonly used in ecotoxicological assays, where undetected differences in contaminant responses between cryptic lineages may lead to confusing or misleading results. Furthermore, because of the key role that earthworm species play in the soil ecosystem, a better understanding of cryptic diversity is necessary to investigate if divergent lineages play different roles within their environments. This can be a serious problem for the reliability of the standard ecotoxicological tests. Traditional earthworm (Annelida, Clitellata: Megadrili) classifications have been mainly built using morphological characters. However, due to the limited number of diagnostic external features, morphological differences alone sometimes do not allow correct identification, especially for sibling taxa which are morphologically similar and whose requirements, overall reproductive performances, and life cycles do not differ significantly. In this study we have demonstrated that the classical morphological distinction between E. fetida and E. andrei does not fit with their phylogenetic structure and we have confirmed that the Eisenia fetida/andrei complex consists of two cryptic sibling species. We have also evaluated the distribution of this species complex according to some scale ecological inferences.

Original languageEnglish
Pages (from-to)55-63
Number of pages9
JournalEuropean Journal of Soil Biology
Volume81
DOIs
Publication statusPublished - Jul 1 2017

Fingerprint

Annelida
Eisenia fetida
Oligochaeta
Iran
earthworms
earthworm
species complex
DNA
soil ecosystem
sibling species
reproductive performance
life cycle
biogeography
assay
phylogenetics
pollutant
phylogeny
assays
Life Cycle Stages
Ecosystem

Keywords

  • COI
  • Eisenia fetida/andrei complex
  • Sibling species
  • Zagros

ASJC Scopus subject areas

  • Microbiology
  • Soil Science
  • Insect Science

Cite this

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title = "When morphology and DNA are discordant: Integrated taxonomic studies on the Eisenia fetida/andrei complex from different parts of Iran (Annelida, Clitellata: Megadrili)",
abstract = "Recent studies have indicated the presence of high cryptic diversity in some clitellate species. Eisenia fetida/andrei is an earthworm species complex that is commonly used in ecotoxicological assays, where undetected differences in contaminant responses between cryptic lineages may lead to confusing or misleading results. Furthermore, because of the key role that earthworm species play in the soil ecosystem, a better understanding of cryptic diversity is necessary to investigate if divergent lineages play different roles within their environments. This can be a serious problem for the reliability of the standard ecotoxicological tests. Traditional earthworm (Annelida, Clitellata: Megadrili) classifications have been mainly built using morphological characters. However, due to the limited number of diagnostic external features, morphological differences alone sometimes do not allow correct identification, especially for sibling taxa which are morphologically similar and whose requirements, overall reproductive performances, and life cycles do not differ significantly. In this study we have demonstrated that the classical morphological distinction between E. fetida and E. andrei does not fit with their phylogenetic structure and we have confirmed that the Eisenia fetida/andrei complex consists of two cryptic sibling species. We have also evaluated the distribution of this species complex according to some scale ecological inferences.",
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