Trithuria sect. Hamannia

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Trithuria sect. Hamannia
Temporal range: 6.15 –0  Ma
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Upper Miocene – Recent [1]
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Order: Nymphaeales
Family: Hydatellaceae
Genus: Trithuria
Section: Trithuria sect. Hamannia
D.D. Sokoloff, Iles, Rudall & S.W. Graham [2]
Type species
Trithuria lanterna
Species

See here

Trithuria sect. Hamannia is a section within the genus Trithuria [2] native to Australia and India. [3]

Contents

Description

The dehiscent, [2] [3] elliptical, [3] apocarpous, monomerous follicle fruit [4] has three longitudinal pericarp ribs. [2] The fruit does not have papillae, doesn't have distinct epicuticular wax deposits, and the apex does not have thickened endocarp cells. [2] The fruit apex also does not have a distinct beak. [3] The fruit splits into three parts along the longitudinal ribs. [4] The smooth seed has a thick cuticle. The sheathless cotyledon is strongly reduced. [2]

Taxonomy

It was described by Dmitry Dmitrievich Sokoloff, William J. D. Iles, Paula J. Rudall, and Sean W. Graham in 2012 with Trithuria lanternaD.A. Cooke as the type species. [2]

Species

It has three species: [2] [5]

Etymology

The section name Hamannia honours Ulrich Hamann who worked on [2] and described the family Hydatellaceae. [6]

Distribution

Its species occur in India (Western Ghats) and Australia (tropical Western Australia, tropical northern Australia). [3]

Phylogeny

Trithuria sect. Hamannia split from Trithuria sect. Altofinia about 6 million years ago in the Upper Miocene. [1] [7]

References

  1. 1 2 Iles, W. J., Lee, C., Sokoloff, D. D., Remizowa, M. V., Yadav, S. R., Barrett, M. D., ... & Graham, S. W. (2014). Reconstructing the age and historical biogeography of the ancient flowering-plant family Hydatellaceae (Nymphaeales). BMC evolutionary biology, 14, 1-10.
  2. 1 2 3 4 5 6 7 8 9 10 Iles, W. J., Rudall, P. J., Sokoloff, D. D., Remizowa, M. V., Macfarlane, T. D., Logacheva, M. D., & Graham, S. W. (2012). Molecular phylogenetics of Hydatellaceae (Nymphaeales): Sexual‐system homoplasy and a new sectional classification. American Journal of Botany, 99(4), 663-676.
  3. 1 2 3 4 5 Sokoloff, D. D., Remizowa, M. V., Macfarlane, T. D., Conran, J. G., Yadav, S. R., & Rudall, P. J. (2013). Comparative fruit structure in Hydatellaceae (Nymphaeales) reveals specialized pericarp dehiscence in some early–divergent angiosperms with ascidiate carpels. Taxon, 62(1), 40-61.
  4. 1 2 Romanov, M. S., Bobrov, A. V. C., Iovlev, P. S., Roslov, M. S., Zdravchev, N. S., Sorokin, A. N., ... & Kandidov, M. V. (2024). Fruit and seed structure in the ANA‐grade angiosperms: Ancestral traits and specializations. American Journal of Botany, 111(1), e16264.
  5. ↑ Iles, W. J. D. (2013). The Phylogeny and Evolution of Two Ancient Lineages of Aquatic Plants (Doctoral dissertation, University of British Columbia).
  6. ↑ Hamann, U. (1976). Hydatellaceae—a new family of Monocotyledoneae. New Zealand Journal of Botany, 14(2), 193-196.
  7. ↑ Lin, Q. (2014). Using a low-copy nuclear gene (phosphoglycerate kinase; PGK) to explore the phylogeny of the aquatic plant family Hydatellaceae (Nymphaeales) (Doctoral dissertation, University of British Columbia).
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