Tag: Alfred Wallace

After 150 years, butterfly collected by Alfred Russel Wallace finds its name

A monograph by a team of international researchers revised the diverse Neotropical butterfly genus Euptychia.

Guest blog post by Shinichi Nakahara

A new Amazonian butterfly

In a drawer of the butterfly collection at the Natural History Museum in London (NHMUK) sit a handful of rather unassuming butterfly specimens from Amazonia. Marked only with a couple of bands and eyespots on the underside of their wings, these specimens were thought to be pitch-brown black-eyed satyrs (Euptychia picea) for over 150 years. Labels attached to some of them suggest that they were collected by 19th-century naturalist Alfred Russel Wallace during his expedition to the Amazon rainforest along with his good friend, Henry Walter Bates. A recent 300-page monographic study of this group of butterflies has recognised these specimens as a species new to science: Euptychia andrewberryi, or Berry’s black-eyed satyr.

A mounted butterfly with brown and cream patterns, featuring prominent eye spots, displayed alongside various small labels.
Euptychia andrewberryi. Photo credit: © Trustees of NHMUK

A monograph by a team of international researchers revised the diverse Neotropical butterfly genus Euptychia. The study was led by Shinichi Nakahara, a Lepidoptera subject editor for ZooKeys, Biodiversity Data Journal, and Neotropical Biology and Conservation.

The story behind the eponym

In 1848, Wallace and Bates set sail on an epic voyage for the Amazon to explore and research its neotropical biodiversity. Their trip was funded by Samuel Stevens, a natural history agent in London. In 1852, after four years of collecting, Wallace returned from Brazil with all his specimens loaded on a ship named the Helen. However, on his way back to London, the Helen caught fire in the middle of the Atlantic Ocean and sank. In the blink of an eye, Wallace lost all of his material. This shipwreck is one of the most disastrous events in the history of science, yet fortunately some of Wallace’s Amazonian material escaped the tragedy and made its way to London.

A black-and-white photo of an old gentleman in formal attire, sitting in an ornate chair at a photo studio.
Alfred Russel Wallace.

Throughout the course of his travels in Amazonia, Wallace occasionally shipped back specimens to Stevens in London. In a letter to Stevens, dated 15 November 1849, Wallace wrote from Santarém (500 miles above Pará), “I spent about three weeks at Montealegre and have now been back here nearly a month, so before I leave for the Rio Negro, I send you a small lot of insects; they consist almost entirely of Lepidoptera…”

The registration records at the NHMUK suggest that the holotype of Euptychia andrewberryi entered the collection in 1850, supporting the notion that it was shipped to London while Wallace was still in Brazil.

A photo of a middle-aged man with short, light gray hair wearing black, seated in a vibrant café setting.
Andrew Berry. Photo by Shori Hijikata

Andrew J. Berry is a historian of science with a long-standing interest in Wallace. A lecturer in the Department of Organismic and Evolutionary Biology at Harvard University, Andrew teaches evolutionary biology and related subjects. While working on the Euptychia monograph, Andrew’s dry sense of humor and undying zest were critical in the completion of a study of such great magnitude. 

Why monographs are important

Taxonomic monographs serve as a foundation for understanding species diversity and phylogenetic relationships within a given group of organisms. They enhance our understanding of the myriad species with which we share our planet. Undertaking work on a monograph typically requires travelling to many museums, incorporating morphological and molecular studies, and conducting field work, as well as reviewing literature to solve taxonomic or nomenclatural conundrums. Despite this tedious process, which requires a great deal of perseverance, monographs underscore the rather underappreciated nature of taxonomy, representing “a small gain for a huge effort.” Unfortunately, most diverse tropical groups of organisms have not yet received a comprehensive taxonomic treatment.　

Euptychia is the largest Neotropical satyrine genus ever to be revised. This monograph increased the known diversity of Euptychia to 50 species, significantly more than hitherto estimated. Although further testing is needed, it is worth emphasising that only 16 described species were recognised in the genus in 2004. It is remarkable to realise that such a profound discrepancy existed between perceived and actual species richness, especially within a well-studied group of invertebrates such as butterflies. This further underscores the importance of revisionary monographic works.

Over a century later, the mystery of the Alfred Wallace’s butterfly is solved

An over a century-long mystery has been surrounding the Taiwanese butterfly fauna ever since the “father of zoogeography” Alfred Russel Wallace described a new species of butterfly: Lycaena nisa, whose identity was only re-examined in a recent project looking into the butterflies of Taiwan. Based on the original specimens, in addition to newly collected ones, Dr Yu-Feng Hsu of the National Taiwan Normal University resurrected the species name and added two new synonyms to it.

Described by the “father of zoogeography” and co-author of the theories of evolution and natural selection, the species hasn’t been reexamined since 1866

An over a century-long mystery has been surrounding the Taiwanese butterfly fauna ever since the “father of zoogeography” Alfred Russel Wallace, in collaboration with Frederic Moore, authored a landmark paper in 1866: the first to study the lepidopterans of the island. 

Back then, in their study, Moore dealt with the moths portion and Wallace investigated the butterflies. Together, they reported 139 species, comprising 93 nocturnal 46 diurnal species, respectively. Of the latter, five species were described as new to science. Even though the correct placements of four out of those five butterflies in question have been verified a number of times since 1886, one of those butterflies: Lycaena nisa, would never be re-examined until very recently. 

In a modern-day research project on Taiwanese butterflies, scientists retrieved the original type specimen from the Wallace collection at The History Museum of London, UK. Having also examined historical specimens housed at the Taiwan Agricultural Research Institute, in addition to newly collected butterflies from Australia and Hong Kong, Dr Yu-Feng Hsu of the National Taiwan Normal University finally resolved the identity of the mysterious Alfred Wallace’s butterfly: it is now going by the name Famegana nisa (comb. nov.), while two other species names (Lycaena alsulus and Zizeeria alsulus eggletoni) were proven to have been coined for the same butterfly after the original description by Wallace. Thereby, the latter two are both synonymised with Famegana nisa.


Type specimen of Famegana nisa, collected by Wallace in 1866 (upper side).
Credit: Dr Yu-Feng Hsu (courtesy of NHM)
License: CC-BY 4.0

Despite having made entomologists scratch their heads for over a century, in the wild, the Wallace’s butterfly is good at standing out. As long as one knows what else lives in the open grassy habitats around, of course. Commonly known as ‘Grass Blue’, ‘Small Grass Blue’ or ‘Black-spotted Grass Blue’, the butterfly can be easily distinguished amongst the other local species by its uniformly grayish white undersides of the wings, combined with obscure submarginal bands and a single prominent black spot on the hindwing. 

However, the species demonstrates high seasonal variability, meaning that individuals reared in the dry season have a reduced black spot, darker ground colour on wing undersides and more distinct submarginal bands in comparison to specimens from the wet season. This is why Dr Yu-Feng Hsu notes that it’s perhaps unnecessary to split the species into subspecies even though there have been up to four already recognised.

Type specimen of Famegana nisa, collected by Wallace in 1866 (bottom side).
Credit: Dr Yu-Feng Hsu (courtesy of NHM)
License: CC-BY 4.0

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Alfred Russel Wallace, a British naturalist, explorer, geographer, anthropologist, biologist and illustrator, was a contemporary of Charles Darwin, and also worked on the debates within evolutionary theory, including natural selection. He also authored the famed book Darwinism in 1889, which explained and defended natural selection. 

While Darwin and Wallace did exchange ideas, often challenging each other’s conclusions, they worked out the idea of natural selection each on their own. In his part, Wallace insisted that there was indeed a strong reason why a certain species would evolve. Unlike Darwin, Wallace argued that rather than a random natural process, evolution was occurring to maintain a species’ fitness to the specificity of its environment. Wallace was also one of the first prominent scientists to voice concerns about the environmental impact of human activity.

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Original source: 

Hsu Y-F (2020) The identity of Alfred Wallace’s mysterious butterfly taxon Lycaena nisa solved: Famegana nisa comb. nov., a senior synonym of F. alsulus (Lepidoptera, Lycaenidae, Polyommatinae). ZooKeys 966: 153-162. https://doi.org/10.3897/zookeys.966.51921

Contact: 

Dr Yu-Feng Hsu, National Taiwan Normal University
Email: t43018@ntnu.edu.tw