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In 2023, the world of biodiversity saw some amazing discoveries . Our taxonomy journals published hundreds of new species, so selecting a Top Ten was tough, but here we go – get to know these beautiful new species, and maybe think about all the amazing diversity that still remains unexplored on our planet.
10. The walking leaf
It’s very often that undescribed species hide in plain sight for years, but it’s easy to understand why when they look like that! Leaf insects look confusingly similar to leaves – this sophisticated camouflage provides excellent protection from predators, but also presents a challenge to researchers.
“There are around 3,500 known species of stick and leaf insects and there are currently just over 100 described species of leaf insect,” researcher Dr Sven Bradler says. This is why when Phyllium ortizi and six other leaf insect species were found, it made for a really special discovery.
Lime-green in colour, Phyllium ortizi is so far only known from Mindanao Island, Philippines.
Published in ZooKeys.
9. The spiky hedgehog
The Eastern Forest Hedgehog (Mesechinus orientalis) was discovered in southwestern China. It is a small-bodied hedgehog, smaller than most of the other species in its genus, its spines as short as 1.8-2 cm. It has a brown nose, with black whiskers that shorten towards the nose.
The species is currently known from southern Anhui and northwestern Zhejiang, where it lives in scrubland and subtropical broad-leaf evergreen forests at elevations from 30 to 700 m.
The researchers found out that genus Mesechinus, to which the new species belongs, dates back to the early Pleistocene and started appearing around 1.71 million years ago, while M. Orientalis diverged from its congeners some 1.1 million years ago.
Published in ZooKeys.
8. The bumpy salamander
Tylototriton zaimeng was found in the eponymous Zaimeng lake in Manipur, India. It is a medium-sized salamander has a massive wide head that could take up as much as a quarter of its total length. Its most distinctive feature are the knob-like warts along its body.
The salamander has an earthy-brown body with orange markings along its head and orange-brown warts down its back and sides. Its tail fades from brown at the base to yellow-orange at the tip.
Even though it has just been discovered as a species for science, locals know a lot about it and have different names for it.
Because its known range is limited and threatened by deforestation and human interference, the species should be considered vulnerable.
Published in Herpetozoa.
7. The “groins of fire” frog
An unexpected discovery, this new treefrog species was found in the Amazon lowlands of central Peru. The research team, led by Germán Chávez, was surprised that a new species could be hiding in plain sight in an otherwise well-explored part of the Amazon. No matter how many times they returned to the site, they only found two specimens, which made its scientific description challenging.
Its name, Scinax pyroinguinis, literally means “groins of fire”. It is a reference to the orange, flame-like pattern on the groins, thighs and shanks, but also to the wildfires in the area where it was found, which are a serious threat to its habitat.
Published in Evolutionary Systematics.
6. The charming carnivore
Pinguicula ombrophila is part of the butterwort family, a group of insectivorous flowering plants consisting of around 115 species. Its leaves have a sticky texture, enabling it to capture and digest small insects.
For carnivorous plants, insects can be an additional source of nutrients to help them compensate the nutrient deficiency of the substrate they’re growing in. This gives them a competitive advantage over other plants and enables them to thrive in challenging habitats.
While the majority of butterworts are found in the northern hemisphere, this species was discovered in the elevated regions of southern Ecuador, near the Peru border. The research team found it on a nearly vertical rock face at 2,900 metres. Its name means “rain-loving butterwort”, highlighting the plant’s preference for very wet conditions.
Published in PhytoKeys.
5. The unicorn fish
Sinocyclocheilus longicornus (from the Latin words “longus”, meaning long, and “cornu”, meaning horn) comes from Southern China. It is only known from a dark vertical cave at an elevation of 2,276 m in the province of Guizhou. It is around 10-15 centimeters long and lacks pigmentation in its scales, which gives it it a ghostly whitish appearance. Since its eyes are small and probably not much help in a completely dark environment, it relies on barbels that look like tiny whiskers to feel its way around.
The researchers that found it are not quite sure what its “horn” is used for, but it might have something to do with navigating its way in the dark and dreary environment it inhabits.
Sinocyclocheilus longicornus is also featured in the SHOALS report on freshwater fish species described in 2023.
Published in ZooKeys.
4. The DiCaprio snake
Sibon irmelindicaprioae was described as a new species together with four more tree-dwelling snake species from jungles of Ecuador, Colombia, and Panama. They all belong to Dipsadinae —a subfamily of snakes found in North and South America.
Also known as DiCaprio’s snail-eating snake, this species was named after actor and film producer Leonardo DiCaprio’s mother, Irmelin DiCaprio. The actor himself chose the name to honour his mother and raise awareness about the threats these snakes face.
Its habitat in Panama is affected by large-scale copper mining. The open-pit mines, some of them visible from space, make the areas uninhabitable for snail-eating snakes.
“These new species of snake are just the tip of the iceberg in terms of new species discoveries in this region, but if illegal mining continues at this rate, there may not be an opportunity to make any future discoveries,” says Alejandro Arteaga, who led the study to describe them.
Published in ZooKeys.
3. The Tolkien frog
You probably guessed it by now – this stream frog from the Ecuadorian Andes was named after J.R.R. Tolkien, the author of The Hobbit and The Lord of the Rings.
At about 66 millimeters (2.5 inches) long, Hyloscirtus tolkieni is tiny enough to fit in the palm of your hand, but that doesn’t stop it from being simply stunning. With pale pink eyes and gold-speckled toes, it looks like it came straight out of Middle-earth. It was found at an elevation of 3190 meters in Río Negro-Sopladora National Park, a protected area of páramo and cloud forests.
“The new species of frog has amazing colours, and it would seem that it lives in a universe of fantasies, like those created by Tolkien. The truth is that the tropical Andes are magical ecosystems where some of the most wonderful species of flora, funga, and fauna in the world are present. Unfortunately, few areas are well protected from the negative impacts caused by humans. Deforestation, unsustainable agricultural expansion, mining, invasive species, and climate changes are seriously affecting Andean biodiversity”, said Diego F. Cisneros-Heredia, one of the researchers behind this discovery.
Published in ZooKeys.
2. The enigmatic Nautilus
2023 was a great year for nautilus biodiversity: three species were described as new to science, including Nautilus samoaensis, which you see here. Like its name tells you, it was found off the coast of American Samoa.
Studying nautilus diversity is no easy feat – with setting spiky traps, hauling them over on board, and, eventually, burping nautiluses, it is surely a memorable experience.
Judging by the fossil record, nautiloids were once quite plentiful throughout the oceans. Today, however, they are represented by just a handful of species.
In addition, these fragile animals remain threatened by wildlife trade as they are hunted for their shells, which according to Mongabay can sell for up to about $1,000 each on the black market.
This beautiful species was also featured in the World Register of Marine Species‘ selection of the top 10 marine species published in 2023, along with another ZooKeys species.
Published in ZooKeys.
1. The electric blue tarantula
Found in Thailand’s Phang-Nga province, Chilobrachys natanicharum features an enchanting phenomenon: a neon blue-purple coloration that gives it a unique look.
There is no blue pigment in this tarantula’s body: the secret behind its striking color comes from the unique structure of its hair, which incorporates nanostructures that manipulate light in an effect that creates the blue appearance. Depending on the light, it can also appear violet.
Before it was described as a new species, Chilobrachys natanicharum was actually known to experts from the commercial tarantula trade market as “Chilobrachys sp. Electric Blue Tarantula,” but this is the first time that it’s discovered in its natural habitat.
Its name, in fact, resulted from an auction campaign, the proceeds from the auction have been channeled to bolster the education of Lahu children in Thailand and to aid impoverished cancer patients.
Published in ZooKeys.