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Guest blog post by Mollie Slater-Baker
It is estimated that only around 20% of the world’s insects are formally described. A formal description is the foundational understanding of a species, including a scientific name, information on how to identify the species, its biology, and where it can be found. With such a large proportion of our insects lacking this foundational information, we are left viewing the insect world through a very small window. This has major implications for conservation of insects and the ecosystems in which they play integral roles. It also limits our understanding of our natural resources, with the study of insects being valuable in a variety of fields, from healthcare and biochemistry, to biological pest control, to insect-inspired engineering.
Unfortunately, with a worldwide lack of taxonomic experts, limited funding, and the immense scale of describing the world’s insects, documenting our insect diversity before it’s lost to extinction is a considerable challenge. But this is where community engagement and citizen science can shine.
The Insect Investigators citizen science project, which ran in Australia in 2022, aimed to involve schools throughout the taxonomic process, to contribute to large-scale collection and documentation of Australian insects, while fostering an appreciation for insect diversity and the role of taxonomy. Fifty rural schools from Queensland, South Australia, and Western Australia participated by setting up Malaise traps (tent-like passive insect traps) to sample local invertebrates near their schools over four weeks. This project resulted in over 60 thousand insect specimens being collected from often under-sampled, more remote parts of Australia. The resulting specimens are preserved and deposited in Australian museums for future research, including taxonomic work.
Through this project, several schools were involved in collecting a rarely collected group of parasitoid wasps belonging to the subfamily Miracinae (aka miracine wasps). These tiny wasps (typically 1-2mm in length) are very difficult to collect using traditional methods, though they appear to be quite diverse in Australia. As parasitoids, miracine wasps require an invertebrate host to complete their lifecycle. For miracine wasps, this host is a leaf-mining caterpillar – the kind that eats small twisting tunnels on the inside of leaves. The wasps lay their eggs inside these caterpillars, and the wasp larvae hatch and eat the caterpillar from the inside out!
Due to their caterpillar-eating biology, and the fact that they are picky eaters, usually targeting a specific species, these wasps can be used to control pests. For example, the miracine wasp species Mirax insularis in Puerto Rico, and Centistidea striata in Brazil, are known to attack coffee leaf-miners, a major pest of coffee plantations – so you may have one of these wasps to thank for your morning coffee!
As part of this project, we engaged with schools to involve them throughout the process of describing the miracine wasps they had collected. First, we ran in-person and online or hybrid workshops with the students to teach them about the new wasp they had discovered, and the taxonomic process involved in describing and naming it. The students then brainstormed a variety of creative names for the new species, which were collaboratively curated and voted upon to arrive at the final species names.
From Queensland, we have Mirax supremus, meaning ‘highest’ in Latin, named after the Pinnacle program at Beerwah State High School, which the students were a part of.
From South Australia, comes Ceduna Area School’s species, Mirax ceduna, named after the school and town the wasp was collected from (colloquially known as the ‘golden bum wasp’).
And from Kwoorabup Nature School in Western Australia (WA), Mirax kaatijan, meaning knowledge/learning in the Noongar language of the south-west region of WA, to represent the new knowledge the students had learnt about insect diversity, and the importance of knowledge about our insects.
Though the descriptions themselves are a small step towards the immense task of describing Australia’s insects, it was inspiring to see the students and their communities really engage with the process and build a connection with their local insects, and an appreciation for these tiny, often-overlooked wasps. We hope this project plays a role in inspiring the next generation of budding entomologists and taxonomists in Australia.
References
1. Stork, N.E., How Many Species of Insects and Other Terrestrial Arthropods Are There on Earth? Annual Review of Entomology, 2018. 63(1): p. 31-45.
2. Song, C., et al., Bee Sting-Inspired Inflammation-Responsive Microneedles for Periodontal Disease Treatment. Research (Wash D C), 2023. 6: p. 0119.
3. Mika, N., H. Zorn, and M. Rühl, Insect-derived enzymes: a treasure for industrial biotechnology and food biotechnology. Adv Biochem Eng Biotechnol, 2013. 136: p. 1-17.
4. Galli, M., et al., Can biocontrol be the game-changer in integrated pest management? A review of definitions, methods and strategies. Journal of Plant Diseases and Protection, 2024. 131(2): p. 265-291.
5. Gorb, S.N. and E.V. Gorb, Insect-inspired architecture to build sustainable cities. Current Opinion in Insect Science, 2020. 40: p. 62-70.
6. Zhang, Y., A. Reid, and J.F.C. Windmill, Insect-inspired acoustic micro-sensors. Current Opinion in Insect Science, 2018. 30: p. 33-38.
7. Suzuki, K., et al., Development of water surface mobile robot inspired by water striders. Micro & Nano Letters, 2017. 12(8): p. 575-579.
8. Engel, M.S., et al., The taxonomic impediment: a shortage of taxonomists, not the lack of technical approaches. Zoological Journal of the Linnean Society, 2021. 193(2): p. 381-387.
9. Slater‐Baker, M.R., et al., First record of miracine parasitoid wasps (Hymenoptera: Braconidae) from Australia: molecular phylogenetics and morphology reveal multiple new species. Austral Entomology, 2022. 61(1): p. 49-67.
10. Navarro, P. and F. Gallardo, Host instar preference of Mirax insularis (Muesebeck) (Hymenoptera: Braconidae), a koinobiont parasitoid of Leucoptera coffeella Guerin-Meneville (Lepidoptera: Lyonetiidae). Journal of Agriculture- University of Puerto Rico, 2009. 93: p. 139-142.
11. Penteado-Dias, A.M., New species of parasitoids on Perileucoptera coffeella ( Guérin-Menèville) (Lepidoptera, Lyonetiidae) from Brazil. Zoologische Mededelingen, 1999. 73: p. 189-197.
12. Slater-Baker M-R, Guzik M, Rodriguez J, Howe A, Woodward A, Ducker N, Fagan-Jeffries E (2025) Three new species of Australian miracine parasitoid wasps collected by regional schools as part of the Insect Investigators citizen science project (Hymenoptera, Braconidae, Miracinae). Journal of Hymenoptera Research 98: 19-45. https://doi.org/10.3897/jhr.98.137806