Nikolas Johnston
Lecturer
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About
Nikolas Johnston is a Lecturer at the University of Wollongong, Australia. His research areas focus on entomology, particularly in species delimitation, blowfly diversity, and the ecological dynamics of carrion insects. He has published recent articles on various topics including the discovery of new species within the Calliphora genus and the impact of carrion insect communities on ecosystems. His work employs genomic analyses to unravel phylogenetic relationships among diverse insect groups.
Articles (18)
Year:
2025
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2025
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2025
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2025
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2025
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2025
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2025
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2024
The Miltogramminae (Diptera: Sarcophagidae) includes ~600 species across >40 genera, which constitute ~20% of global Sarcophagidae. While molecular phylogenetic hypotheses have been produced for this group, critical problems persist, including the presence of paraphyletic genera, uncertain relationships between genera, a bias of sampling towards Palaearctic taxa, and low support for many branches. The present study remedies these issues through the application of Anchored Hybrid Enrichment (AHE) to a sample including ~60% of the currently recognised genera (16% of known species) representing all biogeographic regions except the Neotropical. An alignment of 1,281 concatenated loci was analysed with maximum likelihood (RAxML, IQ‐TREE), Bayesian inference (ExaBayes) and coalescent‐based approaches (ASTRAL, SVDquartets), which resulted in highly supported and concordant topologies, providing unprecedented insight into the relationships of this subfamily of flesh flies, allowing a major update to miltogrammine classification. The AHE phylogenetic hypothesis supports the monophyly of a large proportion of genera. The monophyly of Metopia Meigen is restored by synonymy with Aenigmetopia Malloch, syn.n. To achieve monophyly of Miltogramma Meigen, eight species are transferred from Pterella Robineau‐Desvoidy. The genus Pterella is shown to be paraphyletic in its current circumscription, and to restore generic monophyly Pterella is restricted to contain only Pt. grisea (Meigen). Erioprocta Enderlein, stat.rev. , is resurrected. The genus Senotainia Macquart is reconstructed as paraphyletic. The monotypic genus Metopodia Brauer & Bergenstamm is synonymised with Taxigramma Macquart, syn.n. In light of our phylogenetic hypotheses, a new Miltogramminae tribal classification is proposed, composed of six tribes.
Year:
2023
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2023
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2023
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2023
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2023
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2023
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2023
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2023
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2022
Year:
2022
Collaborators (9)
Gökhan TOLUN
Associate Professor
University of Wollongong
Philip Barton
Associate Professor of Zoology
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Krzysztof Szpila
-
Charles Bell
Professor
Ohio State University
Paulina Trzeciak
Nicolaus Copernicus University
Ashley Olson
Scholarly Teaching Fellow
Federation University Australia - Gippsland Campus
Kelly A Meiklejohn
Assistant Professor of Forensic Science
North Carolina State University
Thomas Pape
Københavns Universitet
Haibo Yu
University of Wollongong
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