Podocarpaceae: Difference between revisions
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{{Short description| | {{Short description|Podocarp family of conifers}} | ||
{{Automatic taxobox | {{Automatic taxobox | ||
| image = Podocarpus elatus habit.jpg | | image = Podocarpus elatus habit.jpg | ||
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| subdivision_ranks = Genera | | subdivision_ranks = Genera | ||
| subdivision = See text | | subdivision = See text | ||
| synonyms = | | synonyms = | ||
*Acmopyleaceae {{small|(Pilg.) Melikyan & A.V.Bobrov}} | |||
*Microcachrydaceae {{small|Doweld & Reveal}} | |||
*Microstrobaceae {{small|Doweld & Reveal}} | |||
*Nageiaceae {{small|D.Z.Fu}} | |||
*Phyllocladaceae {{small|Bessey}} | |||
* | *Phyllocladaceae {{small|Core ex H.Keng}} | ||
* Microcachrydaceae | *Phyllolcadaceae {{small|Bessey}} | ||
* Microstrobaceae | *Prumnopityaceae {{small|A.V.Bobrov & Melikyan}} | ||
* Nageiaceae | *Saxegothaeaceae {{small|Gaussen ex Doweld & Reveal}} | ||
* | |synonyms_ref = {{R|WFO|COL}} | ||
* | |||
* | |||
* Prumnopityaceae | |||
* Saxegothaeaceae | |||
}} | }} | ||
'''Podocarpaceae''' is a large | '''Podocarpaceae''' is a large family of mainly southern hemisphere [[conifer]]s, known in English as '''podocarps''', comprising about 156 species of evergreen trees and shrubs.<ref name="eckenwalder2009">James E. Eckenwalder. 2009. ''Conifers of the World''. Portland, Oregon: Timber Press. {{ISBN|978-0-88192-974-4}}.</ref> It contains 20 [[genera]] if ''[[Phyllocladus]]'' is included and ''[[Manoao]]'' and ''[[Sundacarpus]]'' are recognized. The family achieved its maximum diversity in the [[Cenozoic]], making the Podocarpaceae family one of the most diverse in the southern hemisphere. | ||
The family is a classic member of the [[Antarctic flora]], with its main centres of | The family is a classic member of the [[Antarctic flora]], with its main centres of diversity in [[Australasian realm|Australasia]], particularly [[New Caledonia]], [[Tasmania]], and New Zealand, and to a slightly lesser extent [[Malesia]] and South America (primarily in the [[Andes]] Mountains). Several genera extend north of the equator into [[Indochina]] and the [[Philippines]]. ''[[Podocarpus]]'' reaches as far north as southern Japan and southern China in Asia, and Mexico in the Americas, and ''[[Nageia]]'' into southern China and southern India. Two genera also occur in [[Afrotropic|sub-Saharan]] Africa, the widespread ''Podocarpus'' and the endemic ''[[Afrocarpus]]''. | ||
''[[Parasitaxus usta]]'' is unique as the only known | ''[[Parasitaxus usta]]'' is unique as the only known parasitic [[gymnosperm]]. It occurs on New Caledonia, where it is parasitic on another member of the Podocarpaceae, ''[[Falcatifolium taxoides]]''.<ref name="sinclair2002">William T. Sinclair, R. R. Mill, M. F. Gardner, P. Woltz, T. Jaffré, J. Preston, M. L. Hollingsworth, A. Ponge, and M. Möller. 2002. "Evolutionary relationships of the New Caledonian heterotrophic conifer, ''Parasitaxis usta'' (Podocarpaceae), inferred from chloroplast trnL-F intron/spacer and nuclear rDNA ITS2 sequences". ''Plant Systematics and Evolution'' '''233''' (1–2): 79–104. {{doi|10.1007/s00606-002-0199-8}}</ref> | ||
The genus ''Phyllocladus'' is [[Sister taxon|sister]] to the Podocarpaceae ''[[sensu stricto]]''.<ref name="sinclair2002"/> It is treated by some botanists in its own family, the [[Phyllocladaceae]].<ref name="pagephyllocladaceae">[[Christopher Nigel Page|Christopher N. Page]]. 1990. "Phyllocladaceae" pages 317–319. In: Klaus Kubitzki (general editor); Karl U. Kramer and Peter S. Green (volume editors) ''The Families and Genera of Vascular Plants'' volume I. Berlin, Heidelberg: Springer-Verlag. {{ISBN|978-0-387-51794-0}}</ref> | The genus ''Phyllocladus'' is [[Sister taxon|sister]] to the Podocarpaceae ''[[sensu stricto]]''.<ref name="sinclair2002"/> It is treated by some botanists in its own family, the [[Phyllocladaceae]].<ref name="pagephyllocladaceae">[[Christopher Nigel Page|Christopher N. Page]]. 1990. "Phyllocladaceae" pages 317–319. In: Klaus Kubitzki (general editor); Karl U. Kramer and Peter S. Green (volume editors) ''The Families and Genera of Vascular Plants'' volume I. Berlin, Heidelberg: Springer-Verlag. {{ISBN|978-0-387-51794-0}}</ref> | ||
==Taxonomy== | ==Taxonomy== | ||
The Podocarpaceae show great diversity, both morphologically and ecologically. Members occur mainly in the Southern Hemisphere, with most genetic variety taking place in New Caledonia, New Zealand, and Tasmania. Species diversity of ''Podocarpus'' is found mainly in South America and the | The Podocarpaceae show great diversity, both morphologically and ecologically. Members occur mainly in the Southern Hemisphere, with most genetic variety taking place in New Caledonia, New Zealand, and Tasmania. Species diversity of ''Podocarpus'' is found mainly in South America and the Indonesian islands, the latter also being rich in ''[[Dacrydium]]'' and ''[[Dacrycarpus]]'' species. | ||
''Podocarpus'' (with 82 to 100 species)<ref name="eckenwalder2009"/><ref name="pagepodocarpaceae">Christopher N. Page. 1990. "Podocarpaceae" pages 332–346. In: Klaus Kubitzki (general editor); Karl U. Kramer and Peter S. Green (volume editors) ''The Families and Genera of Vascular Plants'' volume I. Berlin, Heidelberg: Springer-Verlag. {{ISBN|978-0-387-51794-0}}</ref> and ''Dacrydium'' (with 21 species) are the largest genera. A few genera are common to New Zealand and South America, supporting the view that podocarps had an extensive distribution over southern [[Gondwanaland]]. The breaking up of Gondwanaland led to large-scale [[speciation]] of the Podocarpaceae. | ''Podocarpus'' (with 82 to 100 species)<ref name="eckenwalder2009"/><ref name="pagepodocarpaceae">Christopher N. Page. 1990. "Podocarpaceae" pages 332–346. In: Klaus Kubitzki (general editor); Karl U. Kramer and Peter S. Green (volume editors) ''The Families and Genera of Vascular Plants'' volume I. Berlin, Heidelberg: Springer-Verlag. {{ISBN|978-0-387-51794-0}}</ref> and ''Dacrydium'' (with 21 species) are the largest genera. A few genera are common to New Zealand and South America, supporting the view that podocarps had an extensive distribution over southern [[Gondwanaland]]. The breaking up of Gondwanaland led to large-scale [[speciation]] of the Podocarpaceae. | ||
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==References== | ==References== | ||
{{Reflist|refs = | {{Reflist|refs = | ||
<ref name = knopf2012podocarpaceaerelationships>{{cite journal|title = Relationships within Podocarpaceae based on DNA sequence, anatomical, morphological, and biogeographical data|last1 = Knopf|last2 = Schulze|last3 = Little|last4 = Stützel|last5 = Stevenson|journal = Cladistics|volume = 28|date = 2012|issue = 3|pages = 271–299|doi = 10.1111/j.1096-0031.2011.00381.x| pmid=34872191 | s2cid=86581015 |doi-access = free}}</ref> | |||
<ref name = | <ref name="COL">{{cite web |title=''Podocarpaceae'' Endl. |url=https://www.catalogueoflife.org/data/taxon/C7ZN4 |website=Catalogue of Life |publisher=[[Species 2000]] & [[Integrated Taxonomic Information System|ITIS]] |date=2025 |access-date=12 June 2025 |doi=10.48580/dgqdn }}</ref> | ||
<ref name="WFO">{{cite web |url=https://www.worldfloraonline.org/taxon/wfo-7000000484#synonyms |title=''Podocarpaceae'' Endl. |website=[[World Flora Online]] |publisher=World Flora Online Consortium |year=2025 |access-date=12 June 2025}}</ref> | |||
}} | }} | ||
Latest revision as of 23:03, 17 June 2025
Template:Short description Template:Automatic taxobox
Podocarpaceae is a large family of mainly southern hemisphere conifers, known in English as podocarps, comprising about 156 species of evergreen trees and shrubs.[1] It contains 20 genera if Phyllocladus is included and Manoao and Sundacarpus are recognized. The family achieved its maximum diversity in the Cenozoic, making the Podocarpaceae family one of the most diverse in the southern hemisphere.
The family is a classic member of the Antarctic flora, with its main centres of diversity in Australasia, particularly New Caledonia, Tasmania, and New Zealand, and to a slightly lesser extent Malesia and South America (primarily in the Andes Mountains). Several genera extend north of the equator into Indochina and the Philippines. Podocarpus reaches as far north as southern Japan and southern China in Asia, and Mexico in the Americas, and Nageia into southern China and southern India. Two genera also occur in sub-Saharan Africa, the widespread Podocarpus and the endemic Afrocarpus.
Parasitaxus usta is unique as the only known parasitic gymnosperm. It occurs on New Caledonia, where it is parasitic on another member of the Podocarpaceae, Falcatifolium taxoides.[2]
The genus Phyllocladus is sister to the Podocarpaceae sensu stricto.[2] It is treated by some botanists in its own family, the Phyllocladaceae.[3]
Taxonomy
The Podocarpaceae show great diversity, both morphologically and ecologically. Members occur mainly in the Southern Hemisphere, with most genetic variety taking place in New Caledonia, New Zealand, and Tasmania. Species diversity of Podocarpus is found mainly in South America and the Indonesian islands, the latter also being rich in Dacrydium and Dacrycarpus species.
Podocarpus (with 82 to 100 species)[1][4] and Dacrydium (with 21 species) are the largest genera. A few genera are common to New Zealand and South America, supporting the view that podocarps had an extensive distribution over southern Gondwanaland. The breaking up of Gondwanaland led to large-scale speciation of the Podocarpaceae.
Until 1970, only seven Podocarpaceae genera were recognized: Podocarpus, Dacrydium, Phyllocladus, Acmopyle, Microcachrys, Saxegothaea, and Pherosphaera. All four of the African species fell under Podocarpus – P. falcatus, P. elongatus, P. henkelii, and P. latifolius. Taxonomists divided Podocarpus species into eight species groups based on leaf anatomy: Afrocarpus J.Buchholz & N.E.Gray, Dacrycarpus Endl., Eupodocarpus Endl., Microcarpus Pilg., Nageia (Gaertn.) Endl., Polypodiopsis C.E.Bertrand (non Polypodiopsis Carriére nom. rej. prop. 6), Stachycarpus Endl. and Sundacarpus J.Buchholz and N.E.Gray.
Studies of embryology, gametophyte development, female cone structure, and cytology led to the belief that the eight categories probably deserved generic status. Researchers agreed on the need to recognize "fairly natural groupings which prove to have good geographic and probably evolutionary cohesion" and took the necessary steps to raise each section to generic status.[5]
In 1990, a treatment of the Podocarpaceae recognized 17 genera, excluding Phyllocladus from the family, while recognizing Sundacarpus, but not Manoao.[4] In 1995, Manoao was segregated from Lagarostrobus, based on morphological characteristics.[6] In 2002, a molecular phylogenetic study showed Sundacarpus is embedded in Prumnopitys and the monophyly of Lagarostrobos is doubtful if Manoao is included within it.[2] More recent treatments of the family have recognized Manoao, but not Sundacarpus.[7]
Evolution
Molecular evidence supports Podocarpaceae being the sister group to the Araucariaceae, and having diverged from it during the late Permian.[8] While some fossils attributed to the family have been reported from the Late Permian and Triassic, like Rissikia, these cannot be unambiguously assigned to the family. The oldest unambiguous members of the family are known from the Jurassic period, found across both hemispheres, such as Scarburgia and Harrisiocarpus from the Middle Jurassic of England, as well as unnamed species from the Middle-Late Jurassic of Patagonia. Modern genera of the family first appeared during the Early Cretaceous, with the family probably reaching an apex of diversity during the early Cenozoic.[9]
Genera
Studies based on anatomical, biogeographical, morphological, and DNA evidence suggest these relationships:
| Knopf 2012[10] | Leslie et al. 2018[11][12] |
|---|---|
List of genera
References
Further reading
- Christopher J. Quinn and Robert A. Price. 2003. "Phylogeny of the Southern Hemisphere Conifers". Proceedings of the Fourth International Conifer Conference: 129–136. doi:10.17660/ActaHortic.2003.615.10
External links
Template:Sister project Template:Sister project
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- ↑ a b James E. Eckenwalder. 2009. Conifers of the World. Portland, Oregon: Timber Press. Template:ISBN.
- ↑ a b c William T. Sinclair, R. R. Mill, M. F. Gardner, P. Woltz, T. Jaffré, J. Preston, M. L. Hollingsworth, A. Ponge, and M. Möller. 2002. "Evolutionary relationships of the New Caledonian heterotrophic conifer, Parasitaxis usta (Podocarpaceae), inferred from chloroplast trnL-F intron/spacer and nuclear rDNA ITS2 sequences". Plant Systematics and Evolution 233 (1–2): 79–104. Script error: No such module "doi".
- ↑ Christopher N. Page. 1990. "Phyllocladaceae" pages 317–319. In: Klaus Kubitzki (general editor); Karl U. Kramer and Peter S. Green (volume editors) The Families and Genera of Vascular Plants volume I. Berlin, Heidelberg: Springer-Verlag. Template:ISBN
- ↑ a b Christopher N. Page. 1990. "Podocarpaceae" pages 332–346. In: Klaus Kubitzki (general editor); Karl U. Kramer and Peter S. Green (volume editors) The Families and Genera of Vascular Plants volume I. Berlin, Heidelberg: Springer-Verlag. Template:ISBN
- ↑ Barker, N. P.; Muller, E. M.; and Mill, R. R. (2004). "A yellowwood by any other name: molecular systematics and the taxonomy of Podocarpus and the Podocarpaceae in southern Africa" Template:Webarchive. South African Journal of Science, 100: 629–632.
- ↑ Brian P. J. Molloy. 1995. "Manoao (Podocarpaceae), a new monotypic conifer genus endemic to New Zealand". New Zealand Journal of Botany 33 (2): 183–201.
- ↑ Aljos Farjon. 2008. A Natural History of Conifers. Portland, Oregon: Timber Press. Template:ISBN
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