In 2011 REGUA published its first field identification guide, A Guide to the Hawkmoths of the Serra dos Orgaos, South-eastern Brazil, which described and illustrated the 110 species to be found in our area. However, since then there have been a number of taxonomic changes, and a comprehensive paper in the European Entomologist (Vol 11, No 3+4) by Haxaire and Mielke provides the latest list of all the species occurring in Brazil as well as introducing several new species.
All of these species are covered on the website Hawkmoths of Brazil, but of particular interest to the REGUA area are:
A new species Protambulyx pearsoni has been split from P. sulphurea and replaces it in the Serra dos Órgãos.
A new species Manduca exiguus has been separated from M. contracta and has been recorded from the State of Rio de Janeiro but not yet to my knowledge from the Serra dos Órgãos.
Manduca paphus is now recognised as a separate species and has been split from M. sexta.
Nyceryx nephus has been elevated to species status based on a single specimen collected at Cachoeiras de Macacu.
Isognathus brasiliensis has been split from I. swainsonii and replaces it in the Serra dos Órgãos and south-east Brazil.
Eumorpha orientis is now recognised as a separate species and has been split from E. obliquus.
Xylophanes reussi has been split from X. marginalis, but both seem to share the same general distribution.
A new species Xylophanes crenulata has been separated from X. ceratomioides. Only X. crenulata is now thought to occur in the Serra dos Órgãos.
Two new species Xylophanes alineae and X. soaresi have been separated from X. p. continentalis and both are found in the Serra dos Órgãos.
Apparently it is likely that Errinyis ello will be split as well into the type that feeds mainly on manioc, and the type that lives in forest, and the entire complex Nycerx group is also under review.
So I would recommend always using the website now rather than the book, but if you find any errors on the website please let me know and I will correct them.