Effect on South American CL: change scientific name only of Xiphoryhnchus necopinus (Zimmer's Woodcreeper) to Xiphorhynchus kienerii.
Background and rationale: see Aleixo and Whitney (Auk 119: 520-523, 2002). A one-sentence synopsis is that examination of the type specimen of kienerii shows that it is identical to X. necopinus and therefore must be the name of that taxon by rules of priority; necopinus becomes a junior synonym.
Recommendation: Having followed this project for years, I strongly endorse the recommendation of Aleixo and Whitney to correct the nomenclature of this species.
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From Gary Stiles:
"In Zimmer's description of necopinus, he stated that
he hadn't seen kienerii, so no real surprise (I have been
trying to straighten out
the Eastern (Colombian) races of X. picus and came across
exactly the same
problem - at least Zimmer was good enough to state clearly what
he had and
hadn't examined personally!"