A wasp for the wild: New parasitoid species named in honor of the National Geographic Society

The name “natgeo” was chosen in honor of the Society’s legacy of exploration, conservation, and storytelling.

“During the Siang Expedition, funded by the National Geographic Society and Felis Creations, we arrived in the remote village of Yingku in Arunachal Pradesh, knowing we were stepping into one of the last frontiers of biodiversity in India. What we didn’t know was that tucked among the forests and farmlands was a tiny creature that had never been formally introduced to science until now,” say researchers Dr. A.P. Ranjith (Integrative Insect Ecology Research Unit, Department of Biology, Chulalongkorn University, Thailand) and Associate Professor Dr. Buntika A. Butcher (Integrative Insect Ecology Research Unit, Department of Biology, Chulalongkorn University, Thailand). “On the very first day, we collected a pair both male and female of this amazing, enchanting new species!”

A close-up photo of a wasp with delicate wings, elongated antennae, and a slender body.
Heinrichiellus natgeo. Photo credit Dr. A.P. Ranjith

Meet Heinrichiellus natgeo, a newly discovered species of parasitoid wasp. The species was described by Dr. Ranjith and Dr. Gavin R. Broad (The Natural History Museum, London, UK), under the supervision of Additionally, genetic data helped them determine the new species’ systematic placement, with the assistance of Dr. Bernardo F. Santos (Center for Integrative Biodiversity Discovery, Museum für Naturkunde, Berlin, Germany).

A close-up photo of a wasp's head, showcasing large compound eyes and intricate mouthparts against a blurred background.
Heinrichiellus natgeo. Photo credit Dr. A.P. Ranjith

“The name natgeo isn’t a coincidence – we chose it in honor of the National Geographic Society, whose legacy of exploration, conservation, and storytelling has inspired thousands of people. This discovery is our way of saying thank you for their outstanding commitment to the environment,” Dr. Butcher says.

Despite its small size, this insect plays an outsized role in keeping ecosystems balanced. It is a natural enemy of several pest species, ensuring that nature’s checks and balances continue working quietly in the background.

In the field, the wasp didn’t shout for attention no bright colors or loud buzzing. Instead, it was a patient hunter, seeking out the eggs or larvae of its host species. “It’s a reminder that some of nature’s most important work happens in complete silence,” says Dr. Ranjith Even though the researchers do not yet have biological data, they assume that this remarkable species will play a significant role in the forest ecosystem by helping to regulate insect pest populations.

Close-up photo of a wasp's head and thorax.
Heinrichiellus natgeo. Photo credit Dr. A.P. Ranjith

“And here’s a fun twist in the story: we collected both the male and female specimens using a yellow pan trap a deceptively simple tool that works by tapping into parasitoid wasps’ irresistible attraction to the color yellow. It’s fieldwork science at its most charming: a splash of color in the forest that quietly lures in tiny wonders,” Dr. Butcher says.

“Discoveries like this matter not just for the sake of science, but for the health of ecosystems and the future of conservation, particularly in the world’s biodiversity hotspots,” the researchers say in conclusion. ”In a time when species are disappearing faster than we can document them, every new find is both a small victory for biodiversity and an encouragement for more young talents to engage in biodiversity research.”

Lush green mountains and rolling hills under a partly cloudy blue sky, with fog lingering in the valleys.
Landscape view of Yingku village in Arunachal Pradesh. Photo credit Sandesh Kadur/Felis Images.

Alongside this, the researchers also uncovered two more new species, Heinrichiellus brevispinus from Thailand and Heinrichiellus vedani from South India. These exciting finds remind us that India and Thailand still hold countless hidden treasures of biodiversity, waiting to be discovered. They published their study in the Journal of Hymenoptera Research.

Research article:

Ranjith AP, Broad GR, Santos BF, Butcher BA (2025) First report of the genus Heinrichiellus Tereshkin, 2009 (Hymenoptera, Ichneumonidae) from the Oriental region with the description of three new species. Journal of Hymenoptera Research 98: 757-778. https://doi.org/10.3897/jhr.98.158760

About the Research team:

Dr. A.P. Ranjith, a post-doctoral fellow at Chulalongkorn University, Thailand, is an expert taxonomist specializing in hymenopteran parasitoids, with more than ten years of experience in taxonomy and systematics. He has described over 100 species and 11 genera new to science.

Dr. Gavin R. Broad, based at the Natural History Museum, UK, has several decades of experience in the phylogeny and systematics of ichneumonid parasitoid wasps. He has described several hundred new species and numerous new genera.

Dr. Bernardo F. Santos, from the Museum für Naturkunde, Germany, possesses extensive knowledge of the evolution and phylogeny of parasitoid wasps, with a strong background in parasitoid taxonomy.

Dr. Buntika A. Butcher, who supervised the study, is an Associate Professor at Chulalongkorn University. She is an experienced researcher with strong expertise in the taxonomy and systematics of braconid parasitoid wasps and their biology.

The team focuses primarily on documenting biodiversity in understudied countries such as India and Thailand, while raising awareness of the ecological importance of insect diversity.

Non-native pest-controlling wasp identified in Canada prior to formal approval

A samurai wasp (Trissolcus japonicus) lays an egg inside a brown marmorated stink bug (Halyomorpha halys) egg. The samurai wasp’s offspring will develop inside the pest’s egg and emerge as an adult wasp. Photo by Warren Wong.

Thought to be Canada’s most promising potential defense against the brown marmorated stink bug – a globally spreading agricultural pest native to Asia – the samurai wasp (another species from Asia and natural parasitoid of the former) has been considered for future release in the country in recent years.

However, prior to any formal decision and regulatory approval, the parasitoid, which is known to be specialized on stink bug eggs, was identified at a heavily infested site in Chilliwack, British Columbia, during a survey of the local enemies of the bug, conducted by a research team led by Dr. Paul Abram of Agriculture and Agri-Food Canada. Their findings are published in the open-access Journal of Hymenoptera Research.

Native to China, Japan, Taiwan and the Korean peninsula, the brown marmorated stink bug (Halyomorpha halys) has already established in areas of the United States and Europe and continues to spread. It is highly damaging to a wide range of vegetable and fruit crops, including peaches, apples, pears, soybeans, cherries, raspberries and pears. Curiously, those infested areas in both the USA and Europe also saw the arrival of the samurai wasp (Trissolcus japonicus) amid assessments whether releasing samurai wasps in the wild should be warranted.

“Classical (importation) biological control of invasive pests, where natural enemies are imported and intentionally introduced from a pest’s area of origin, involves years of research to assess risks and benefits of proposed introductions, followed by regulatory approval,” explain the researchers in their paper.

“However, there is increasing recognition that unintentional introductions of natural enemies are probably common, introducing a high level of uncertainty to the regulatory process for biological control introductions.”

In two consecutive years (2017 and 2018), the team of Dr Abram placed a total of 1,496 egg masses (41,351 eggs) of brown marmorated stink bugs at 16 field sites in coastal and interior British Columbia – already known to host large and well-established breeding populations of the species – in order to monitor and identify the local enemies of the pest. Later on, when the researchers retrieved the eggs and studied their parasitoids, they found three native wasp species, but their parasitism appeared largely unsuccessful.

Female samurai wasp (Trissolcus japonicus) collected from Chilliwack, British Columbia. Photo by Elijah Talamas.

According to the scientists, as well as previous studies conducted in both the USA and Europe, native wasps would often lay their eggs in those of the brown marmorated stink bug, but their larvae would rarely complete development. Even when they emerged, they were unlikely to produce their own offspring.

In one of the egg masses, however, the scientists noted that all eggs had been parasitized and, moreover, each produced a viable wasp. Later, the offspring would register a success of >90% in parasitizing brown marmorated stink bug eggs. Following these observations, the team identified these parasitoids as samurai wasps.

While the species is currently being redistributed within some US states on purpose, samurai wasp populations advancing to other localities suggest that much like its host, the parasitoid is also becoming a “global invader”. Therefore, it is quite possible that the samurai wasps in British Columbia have simply crossed a distance of >400 km from nearby Washington State, and the wasp is still at the early stages of its establishment in Canada.

“Nonetheless, the detection of this exotic biological control agent in Canada concurrently with regulatory review of its intentional importation and release is emblematic of the current uncertainty around regulatory control on the movement of biological control agents across borders,” comment the authors of the study.

Field surveys and extensive analyses are currently underway to track the establishment and biological control impact of the samurai wasp in Canada and also reveal how the species ended up in British Columbia.

 

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Original source:

Abram PK, Talamas EJ, Acheampong S, Mason PG, Gariepy TD (2019) First detection of the samurai wasp, Trissolcus japonicus (Ashmead) (Hymenoptera, Scelionidae), in Canada. Journal of Hymenoptera Research 68: 29-36. https://doi.org/10.3897/jhr.68.32203