Morphological versus molecular delimitation of ciliate species: a case study of the family Clevelandellidae (Protista, Ciliophora, Armophorea)
| Autor: | Lukáš Pecina, Peter Vďačný |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
020209 energy
0211 other engineering and technologies shape analysis 02 engineering and technology Armophorea 18S ribosomal RNA boats Ciliophora (awaiting allocation) species concepts boats.ship_class 021105 building & construction Genotype Clevelandellidae 0202 electrical engineering electronic engineering information engineering Ciliophora Gene cell outline Ecology Evolution Behavior and Systematics Taxonomy Ciliate Chromista biology 18S rRNA gene Botany Hindgut Biodiversity biology.organism_classification Phenotype Heterotrichea Taxon QL1-991 Evolutionary biology QK1-989 Heterotrichida Zoology morphometry |
| Zdroj: | European Journal of Taxonomy, Iss 697 (2020) |
| ISSN: | 2118-9773 |
| Popis: | The endozoic ciliates of the family Clevelandellidae Kidder, 1938 typically inhabit the hindgut of wood-feeding panesthiine cockroaches. To assess the consistency of species delimitation in clevelandellids, we tested the utility of three sources of taxonomic data: morphometric measurements, cell geometrical information, and 18S rRNA gene sequences. The morphometric and geometrical data delimited the clevelandellid morphospecies consistently and unambiguously. However, only Paraclevelandia brevis Kidder, 1937 represented a homogenous taxon in both morphological and molecular analyses; the morphospecies Clevelandella constricta (Kidder, 1937) and C. hastula (Kidder, 1937) contained two or three distinct, more or less closely related genotypes each; and the genetic homogeneity of the morphospecies C. panesthiae (Kidder, 1937) and C. parapanesthiae (Kidder, 1937) was not corroborated by the 18S rRNA gene sequences at all. Moreover, the 18S rRNA gene phylogenies suggested the C. panesthiae-like morphotype to be the ancestral phenotype from which all other clevelandellid morphotypes arose. The only exception was the C. constricta-like morphotype, which very likely branched off before the diversification of the C. panesthiae-like progenitor. The present molecular analyses also suggested that a huge proportion of the clevelandellid diversity still waits to be discovered, since examination of only four panesthiine populations revealed 10 distinct clevelandellid genotypes/molecular species. |
| Databáze: | OpenAIRE |
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