Israelaphis Carmini
''Israelaphis'' is the sole genus in Israelaphidinae: a monotypic subfamily of the family Aphididae. Species The ''Aphid Species File'' lists: # ''Israelaphis carmini'' Essig, 1953 - type species # ''Israelaphis caucasica'' Mamontova & Zhuravlev, 2003 # ''Israelaphis ilharcoi'' Barbagallo & Patti, 1999 # ''Israelaphis lambersi'' Ilharco, 1961 References

{{Taxonbar, from=Q10537995, from2=Q18352380 Aphididae Sternorrhyncha genera ...
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Monotypic
In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispecific" or "monospecific" is sometimes preferred. In botanical nomenclature, a monotypic genus is a genus in the special case where a genus and a single species are simultaneously described. Theoretical implications Monotypic taxa present several important theoretical challenges in biological classification. One key issue is known as "Gregg's Paradox": if a single species is the only member of multiple hierarchical levels (for example, being the only species in its genus, which is the only genus in its family), then each level needs a distinct definition to maintain logical structure. Otherwise, the different taxonomic ranks become effectively identical, which creates problems for organizing biological diversity in a hierarchical syste ...
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