A revision of the <i>Calytrix acutifolia</i> complex (Myrtaceae: Chamelaucieae)

Nge, Francis J.; Keighery, Gregory John; Thiele, Kevin R.

doi:10.58828/nuy00847

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…Calytrix acutifolia (Lindl.) Craven was segregated into four species in a recent revision of the group by Nge et al (2017). Species within the group lack awns and have white flowers with elongate inflorescences.…”

Section: Introductionmentioning

confidence: 99%

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Calytrix calingiri, a new species from the Calytrix acutifolia species group (Myrtaceae: Chamelaucieae)

Nge¹,

Thiele²

2022

Nuytsia

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A taxonomic assessment of Calytrix cravenii Nge & K.R.Thiele has shown that a distinct morphological variant that occurs near Calingiri in south-west Western Australia is best regarded as a distinct species. It is described here as Calytrix calingiri Nge & K.R.Thiele sp. nov.Key to species of the Calytrix acutifolia species group 1. Bracteoles with translucent wings that extend to and overlap to the apex, covering > 3/4 the length of the hypanthium; corolla 7.

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Section: Introductionmentioning

confidence: 99%

“…Among the species in the group, Calytrix cravenii Nge & K.R.Thiele is most variable in leaf and floral morphology (Nge et al 2017). Specimens from the Calingiri area with distinctly short leaves, petals, and hypanthia were discussed by Nge et al (2017) and tentatively placed within C. cravenii pending further study.…”

Section: Introductionmentioning

confidence: 99%

Calytrix calingiri, a new species from the Calytrix acutifolia species group (Myrtaceae: Chamelaucieae)

Nge¹,

Thiele²

2022

Nuytsia

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Phylogenomics and continental biogeographic disjunctions: insight from the Australian starflowers (Calytrix)

Nge

Biffin

Waycott

et al. 2022

American J of Botany

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Premise: Continental-scale disjunctions and associated drivers are core research interests in biogeographic studies. Here, we selected a species-rich Australian plant genus (Calytrix; Myrtaceae) as a case study to investigate these patterns. Species of this endemic Australian starflower genus have a disjunct distribution across the mesic fringes of the continent and are largely absent from the arid center. Methods: We used high-throughput sequencing to generate unprecedented resolution and near complete species-level nuclear and plastid phylogenies for Calytrix. Bio-GeoBEARS and biogeographic stochastic mapping were used to infer ancestral areas, the relative contributions of vicariance and dispersal events, and directionality of dispersal.Results: Present-day disjunctions in Calytrix are explained by a combination of scenarios: (1) retreat of multiple lineages from the continental center to the more mesic fringes as Australia became progressively more arid, with subsequent extinction in the center as well as (2) origination of ancestral lineages in southwestern Australia (SWA) for species-rich clades. The SWA biodiversity hotspot is a major diversification center and the most common source area of dispersals, with multiple lineages originating in SWA and subsequently spreading to the adjacent arid Eremaean region. Conclusions: Our results suggest that major extinction, as a result of cooling and drying of the Australian continent in the Eocene-Miocene, shaped the present-day biogeography of Calytrix. We hypothesize that this peripheral vicariance pattern, which is similar to the African Rand flora, may explain the disjunctions of many other Australian plant groups. Further studies with densely sampled phylogenies are required to test this hypothesis.

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Homogeneous colleters in Myrteae (Myrtaceae)

Sosa

González

2023

Protoplasma

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A revision of the Calytrix acutifolia complex (Myrtaceae: Chamelaucieae)

Cited by 3 publications

References 7 publications

Calytrix calingiri, a new species from the Calytrix acutifolia species group (Myrtaceae: Chamelaucieae)

Calytrix calingiri, a new species from the Calytrix acutifolia species group (Myrtaceae: Chamelaucieae)

Phylogenomics and continental biogeographic disjunctions: insight from the Australian starflowers (Calytrix)

Homogeneous colleters in Myrteae (Myrtaceae)

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