biological species concept Journal Article 3 Research Support, Non-U.S. Gov't 2 Congress 1 Panagrolaimus 1 Pyropia yezoensis 1 allopolyploidy 1 mehr ... breeding 1 cryptic species 1 culture isolate 1 gene flow 1 genetic and molecular mechanisms 1 hybridization 1 interspecific hybridization 1 kelp 1 method 1 microsatellite 1 molecular barcode 1 morphology 1 morphospecies 1 nematode 1 next generation sequencing advances 1 parapatry 1 plant speciation 1 rRNA 1 reproductive isolation 1 reproductive isolation barriers 1 scanning electron microscopy 1 secondary contact 1 speciation 1 weniger ...