Phylogenetics and Biogeography of New Zealand Fauna

New Zealand’s distinctive fauna reflects a complex history of isolation, geological upheaval and colonisation. Following the fragmentation of Gondwana, lineages diverged in situ under vicariant processes and sporadic long-distance dispersals. Molecular phylogenetics has resolved deep relationships among birds, bats, invertebrates and plants, revealing multiple waves of colonisation from distant landmasses and episodes of adaptive radiation in insular habitats. Biogeographic analyses integrate fossil evidence, tectonic reconstructions and climatic shifts, demonstrating how Pleistocene glaciations, mountain uplift and sea-level changes shaped population structure and endemism. This body of work informs conservation strategies by clarifying evolutionary distinctiveness, guiding restoration of native assemblages and offering predictive insights into species’ responses to ongoing environmental change.

Research from Nature Portfolio

A new genus and species of Miocene mystacinid bat was described from Central Otago, shedding light on lost diversity in noctilionoid lineages. Bayesian total-evidence phylogenetic analysis positioned this taxon among New Zealand’s burrowing bats and revealed novel dental autapomorphies that imply an omnivorous feeding strategy. Divergence estimates indicate a richer morphological repertoire in the early Miocene, underscoring substantial decline in diversity since that epoch. The study demonstrates the power of integrating fossil morphology with extant molecular datasets to reconstruct timescales of adaptive radiations and morphological convergence within island systems.

Phylogenetics and Biogeography of New Zealand Fauna publication trend

The graph below shows the total number of articles in phylogenetics and biogeography of new zealand fauna across all publications each year (not limited to Nature Index journals).

Technical terms

Phylogenetics: Study of evolutionary relationships among species based on genetic or morphological data.

Biogeography: Analysis of the distribution of species across geographic space and time.

Vicariance: Speciation resulting from geographic or environmental barriers that divide populations.

Long-distance dispersal: Colonisation events in which organisms traverse significant barriers to establish new populations.

Molecular clock: Method for estimating divergence times by assuming a roughly constant rate of genetic mutation.

Haplotype: Combination of alleles at adjacent loci on a chromosome inherited together, used in population studies.

Endemism: Condition of species being restricted to a defined geographic area.

References

1. A new, large-bodied omnivorous bat (Noctilionoidea: Mystacinidae) reveals lost morphological and ecological diversity since the Miocene in New Zealand. Scientific Reports (2018).
2. A population genomics analysis of the Aotearoa New Zealand endemic rewarewa tree (Knightia excelsa). npj Biodiversity (2024).
3. Phenotypic and genetic divergence in a cold‐adapted grasshopper may lead to lineage‐specific responses to rapid climate change. Diversity and Distributions (2024).
4. Relaxed Molecular Clock Provides Evidence for Long-Distance Dispersal of Nothofagus (Southern Beech). PLOS Biology (2005).