Inference of evolutionary relationships between nematodes is severely hampered by their conserved morphology, the high frequency of homoplasy, and the scarcity of phylum-wide molecular data. To study the origin of nematode radiation and to unravel the phylogenetic relationships between distantly related species, 339 nearly full-length small-subunit rDNA sequences were analyzed from a diverse ra...

Summary Specimens of a thin longidorid species collected in Peñalba (Huesca), north-west Spain, were previously described as Paralongidorus iberis . However, we conclude, through scanning electron microscopy and molecular studies on population from about 15 km the type locality paratype specimens, that this was originally placed wrong genus. Both populations have pore-like amphidial apertures, ...