Umkomasiaceae ✝
| Description | Corystospermaceae is a natural family of seed ferns (Pteridospermatophyta) also called Umkomasiaceae, and first based on fossils collected by Hamshaw Thomas from the Burnera Waterfall locality near the Umkomaas River of South Africa The leaves of Dicroidium were recognized by Alex Du Toit to unite all the countries of the Gondwana supercontinent during the Triassic: Africa, South America, India, and Australia. Subsequently, Dicroidium was found in the Triassic of Antarctica and New Zealand, and also the Permian ofJordan. According to the form generic system of paleobotany, leaves are given separate generic names to ovulate and pollen organs, but the discovery of these reproductive organs in Africa by Thomas, and subsequently throughout Gondwana, strengthened Du Toit's concept of a continuous southern supercontinent. From Wikipedia article at https://en.wikipedia.org/wiki/Umkomasiaceae, which is released under the Creative Commons Attribution-Share-Alike License 3.0. | ||||||||||||||||||||||||||||||
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| Source Data |
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| Rank | family | ||||||||||||||||||||||||||||||
| Taxonomy (GBIF) | Life : Plantae : Tracheophyta : Umkomasiaceae | ||||||||||||||||||||||||||||||
| Taxonomy (PBDB) | Life : Plantae : Peltaspermophyta : Peltaspermopsida : Peltaspermales : Umkomasiaceae | ||||||||||||||||||||||||||||||
| Taxonomic Status (GBIF) | accepted | ||||||||||||||||||||||||||||||
| Classification (PBDB,GBIF) |
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| Scientific Name | Umkomasiaceae | ||||||||||||||||||||||||||||||
| Opinions (PBDB) |
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| Status (PBDB) | extinct | ||||||||||||||||||||||||||||||
| Taxon Size (PBDB) | 22 | ||||||||||||||||||||||||||||||
| First Recorded Appearance | 269 - 265 Ma Permian | ||||||||||||||||||||||||||||||
| Last Recorded Appearance | 105 - 94 Ma Cretaceous | ||||||||||||||||||||||||||||||
| Primary Reference (PBDB) | S. V. Meyen. 1984. Basic features of gymnosperm systematics and phylogeny as evidenced by the fossil record. Botanical Review 50(1):1-111 | ||||||||||||||||||||||||||||||
| Wikipedia | https://en.wikipedia.org/wiki/Umkomasiaceae |
Fossil Distribution
Subtaxa
| Name | Status | Common Name(s) | Fossil Occurrences | Oldest | Youngest |
|---|---|---|---|---|---|
| Dicroidium ✝ genus | listed (PBDB) | 158 | 269 Ma Permian | 199 Ma Early Jurassic | |
| Harrisiothecium ✝ genus | listed (PBDB) | 2 | 228 Ma Late/Upper Triassic | 228 Ma Late/Upper Triassic | |
| Komlopteris genus | accepted (GBIF) | No associated record in PBDB | |||
| Nidia ✝ genus | listed (PBDB) | 2 | 269 Ma Permian | 252 Ma Permian | |
| Nidistrobus ✝ genus | listed (PBDB) | 2 | 269 Ma Permian | 252 Ma Permian | |
| Pachypteris ✝ genus | accepted (GBIF) listed (PBDB) | 141 | 252 Ma Permian | 105 Ma Early/Lower Cretaceous | |
| Pilophorosperma ✝ genus | listed (PBDB) | ||||
| Pteroma ✝ genus | listed (PBDB) | 1 | 174 Ma Middle Jurassic | 174 Ma Middle Jurassic | |
| Pteruchus ✝ genus | listed (PBDB) | 30 | 269 Ma Permian | 237 Ma Middle Triassic | |
| Ptilozamites ✝ genus | listed (PBDB) | 76 | 247 Ma Early/Lower Triassic | 174 Ma Middle Jurassic | |
| Rhaphidopteris ✝ genus | accepted (GBIF) listed (PBDB) | 16 | 269 Ma Permian | 156 Ma Jurassic | |
| Rhexoxylon ✝ genus | listed (PBDB) | ||||
| Umkomasia ✝ genus | listed (PBDB) | 22 | 237 Ma Middle Triassic | 209 Ma Late/Upper Triassic | |
| Zuberia genus | accepted (GBIF) | No associated record in PBDB | |||
Obsolete Names
| Name | Source | Taxon Rank | Taxonomy |
|---|---|---|---|
| Corystospermaceae | GBIF | family | Plantae : Tracheophyta : Corystospermaceae |
Synonymy List
| Year | Name and Author |
|---|---|
| 1981 | Umkomasiaceae Petriella |
| 1984 | Umkomasiaceae Meyen p. 89 |
References
