What do you mean by "complex species"?

I refer to species very similar morphologically (difficult to distinguish between them), that have been detected using molecular biology techniques.

Juan Lucas Cervera Look at work of Fourie, Gerda, et al. "Current status of the taxonomic position of Fusarium oxysporum formae specialis cubense within the Fusarium oxysporum complex." Infection, Genetics and Evolution 11.3 (2011): 533-542.

From the Abstract:

"Fusarium oxysporum is an asexual fungal species that includes human and animal pathogens and a diverse range of nonpathogens. Pathogenic and nonpathogenic strains of this species can be distinguished from each other with pathogenicity tests, but not with morphological analysis or sexual compatibility studies. Substantial genetic diversity among isolates has led to the realization that F. oxysporum represents a complex of cryptic species."

Dear Alex,

Thanks a lot for your message. It's very useful for me.

Regards.

Juan Lucas Cervera.

There are many species complexes in plant pathogenic bacteria (Agrobacterium tumefaciens, Pseudomonas syringae, Ralstonia solanacearum, etc.) and in several plant pathogenic fungi. It looks like the members of such species complex can be poorly distinguished by traditional tests of microbiology / mycology, but have clear difference in virulence.

Thank you very much for your helpful awnser Alex.

Regards.

Juan Lucas Cervera.

To Alex's comment, I'll add the Burkholderia cepacia complex.

https://www.nature.com/articles/nrmicro1085

Thanks a lot Phil!

Regards.

Juan Lucas Cervera.

Article Medical Fusarium: novel species or uncertain identifications?

Thank you so much Phil!!!

Juan Lucas Cervera.

Hi Lucas, well there are some examples in marine gastropods: for example Dendropoma petraeum specie scomplex (now splitted at least in three species, one of them endemc to the Alboran Sea....), jCrepipatella dilatata species complex think also in Spurilla neapolitana is a species complex. Best regards

Hi Alexandra,

I knew the examples that you mention, However, I was interested in complex species in other Eukariota lineages, moreover Metazoa.

Best.

Lucas.