Spore Evidence for the Origin of Isoetalean Lycopsids?
A new hypothesis about the origin of isoetalean lycopsids was proposed based on palynological data. The occurrence of three apical papillae on the proximal surfaces of miospores is a significant palynological feature that is clearly defined in both isoetalean and selaginellalean clades. Three apical...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-07-01
|
| Series: | Life |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-1729/13/7/1546 |
| _version_ | 1797588592121348096 |
|---|---|
| author | Jiří Bek Jana Votočková Frojdová |
| author_facet | Jiří Bek Jana Votočková Frojdová |
| author_sort | Jiří Bek |
| collection | DOAJ |
| description | A new hypothesis about the origin of isoetalean lycopsids was proposed based on palynological data. The occurrence of three apical papillae on the proximal surfaces of miospores is a significant palynological feature that is clearly defined in both isoetalean and selaginellalean clades. Three apical papillae appeared for the first time within lower Silurian (Wenlockian ca. 430 My) and only in rhyniophytoid plants. Using this observation, we suggest that isoetalean lycopsids could have evolved directly from rhyniophytoids and not from protolepidodendralean lycopsids in the middle Devonian (Eifelian–Givetian) as previously suggested, because protolepidodendralean spores do not possess three apical papillae. Spores with three apical papillae, reported as dispersed as well as in situ, were recorded continuously from the lower Silurian (Wenlockian) through the Devonian, Carboniferous, Permian, Mesozoic to Cenozoic era and form a phylogenetically independent lineage. |
| first_indexed | 2024-03-11T00:54:14Z |
| format | Article |
| id | doaj.art-d41f17b6b030411f811e2e23e01257bd |
| institution | Directory Open Access Journal |
| issn | 2075-1729 |
| language | English |
| last_indexed | 2024-03-11T00:54:14Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Life |
| spelling | doaj.art-d41f17b6b030411f811e2e23e01257bd2023-11-18T20:10:00ZengMDPI AGLife2075-17292023-07-01137154610.3390/life13071546Spore Evidence for the Origin of Isoetalean Lycopsids?Jiří Bek0Jana Votočková Frojdová1Institute of Geology, Academy of Sciences of the Czech Republic, Rozvojová 269, 16500 Prague, Czech RepublicInstitute of Geology, Academy of Sciences of the Czech Republic, Rozvojová 269, 16500 Prague, Czech RepublicA new hypothesis about the origin of isoetalean lycopsids was proposed based on palynological data. The occurrence of three apical papillae on the proximal surfaces of miospores is a significant palynological feature that is clearly defined in both isoetalean and selaginellalean clades. Three apical papillae appeared for the first time within lower Silurian (Wenlockian ca. 430 My) and only in rhyniophytoid plants. Using this observation, we suggest that isoetalean lycopsids could have evolved directly from rhyniophytoids and not from protolepidodendralean lycopsids in the middle Devonian (Eifelian–Givetian) as previously suggested, because protolepidodendralean spores do not possess three apical papillae. Spores with three apical papillae, reported as dispersed as well as in situ, were recorded continuously from the lower Silurian (Wenlockian) through the Devonian, Carboniferous, Permian, Mesozoic to Cenozoic era and form a phylogenetically independent lineage.https://www.mdpi.com/2075-1729/13/7/1546lycopsidsisoetaleansselaginellaleansrhyniophytessporespalynology |
| spellingShingle | Jiří Bek Jana Votočková Frojdová Spore Evidence for the Origin of Isoetalean Lycopsids? Life lycopsids isoetaleans selaginellaleans rhyniophytes spores palynology |
| title | Spore Evidence for the Origin of Isoetalean Lycopsids? |
| title_full | Spore Evidence for the Origin of Isoetalean Lycopsids? |
| title_fullStr | Spore Evidence for the Origin of Isoetalean Lycopsids? |
| title_full_unstemmed | Spore Evidence for the Origin of Isoetalean Lycopsids? |
| title_short | Spore Evidence for the Origin of Isoetalean Lycopsids? |
| title_sort | spore evidence for the origin of isoetalean lycopsids |
| topic | lycopsids isoetaleans selaginellaleans rhyniophytes spores palynology |
| url | https://www.mdpi.com/2075-1729/13/7/1546 |
| work_keys_str_mv | AT jiribek sporeevidencefortheoriginofisoetaleanlycopsids AT janavotockovafrojdova sporeevidencefortheoriginofisoetaleanlycopsids |