Stem Anatomy Confirms <i>Tingia unita</i> Is a Progymnosperm
<i>Tingia</i> Halle, a representative genus of the Cathaysia Flora, has been studied for nearly 100 years, being a small heterosporous tree based on the gross morphology of <i>Tingia unita</i>. However, the systematic affinity of <i>Tingia</i> is uncertain. Now, a...
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MDPI AG
2023-03-01
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| Online Access: | https://www.mdpi.com/2079-7737/12/4/494 |
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| author | Yang Yang Shi-Jun Wang Jun Wang |
| author_facet | Yang Yang Shi-Jun Wang Jun Wang |
| author_sort | Yang Yang |
| collection | DOAJ |
| description | <i>Tingia</i> Halle, a representative genus of the Cathaysia Flora, has been studied for nearly 100 years, being a small heterosporous tree based on the gross morphology of <i>Tingia unita</i>. However, the systematic affinity of <i>Tingia</i> is uncertain. Now, a number of well-preserved fossils of <i>T. unita</i> from the Taiyuan Formation of Lower Permian in Wuda Coalfield, Wuhai City, Inner Mongolia facilitates an examination of wood anatomy. The stem anatomy of <i>T. unita</i> shows parenchymatous pith, endarch primary xylem, pycnoxylic secondary xylem, and cortex, typically a type of gymnosperm wood, which taken together with pteridophytic reproduction, certainly evidences that <i>Tingia</i> Halle is a progymnosperm. In addition, <i>Tingia</i> together with <i>Paratingia</i> provide strong evidence to link the Noeggerathiales with progymnosperms. |
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| language | English |
| last_indexed | 2024-03-11T05:14:14Z |
| publishDate | 2023-03-01 |
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| spelling | doaj.art-a046133ac15f40b1ab2e5d0fbee8c7572023-11-17T18:23:04ZengMDPI AGBiology2079-77372023-03-0112449410.3390/biology12040494Stem Anatomy Confirms <i>Tingia unita</i> Is a ProgymnospermYang Yang0Shi-Jun Wang1Jun Wang2State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, No. 39 East Beijing Road, Nanjing 210008, ChinaState Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, ChinaState Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, No. 39 East Beijing Road, Nanjing 210008, China<i>Tingia</i> Halle, a representative genus of the Cathaysia Flora, has been studied for nearly 100 years, being a small heterosporous tree based on the gross morphology of <i>Tingia unita</i>. However, the systematic affinity of <i>Tingia</i> is uncertain. Now, a number of well-preserved fossils of <i>T. unita</i> from the Taiyuan Formation of Lower Permian in Wuda Coalfield, Wuhai City, Inner Mongolia facilitates an examination of wood anatomy. The stem anatomy of <i>T. unita</i> shows parenchymatous pith, endarch primary xylem, pycnoxylic secondary xylem, and cortex, typically a type of gymnosperm wood, which taken together with pteridophytic reproduction, certainly evidences that <i>Tingia</i> Halle is a progymnosperm. In addition, <i>Tingia</i> together with <i>Paratingia</i> provide strong evidence to link the Noeggerathiales with progymnosperms.https://www.mdpi.com/2079-7737/12/4/494stemanatomyscalariform bordered pitsNoeggerathialesearly permian |
| spellingShingle | Yang Yang Shi-Jun Wang Jun Wang Stem Anatomy Confirms <i>Tingia unita</i> Is a Progymnosperm Biology stem anatomy scalariform bordered pits Noeggerathiales early permian |
| title | Stem Anatomy Confirms <i>Tingia unita</i> Is a Progymnosperm |
| title_full | Stem Anatomy Confirms <i>Tingia unita</i> Is a Progymnosperm |
| title_fullStr | Stem Anatomy Confirms <i>Tingia unita</i> Is a Progymnosperm |
| title_full_unstemmed | Stem Anatomy Confirms <i>Tingia unita</i> Is a Progymnosperm |
| title_short | Stem Anatomy Confirms <i>Tingia unita</i> Is a Progymnosperm |
| title_sort | stem anatomy confirms i tingia unita i is a progymnosperm |
| topic | stem anatomy scalariform bordered pits Noeggerathiales early permian |
| url | https://www.mdpi.com/2079-7737/12/4/494 |
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