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Yarravia
Taxonomy
Yarravia was named by Lang and Cookson (1935). It is not extant. Its type is Yarravia oblonga.
It was assigned to Plantae by Andrews (1970); to Embryophyta by McSweeney et al. (2021); and to Euphyllophytina by Huang et al. (2022).
It was assigned to Plantae by Andrews (1970); to Embryophyta by McSweeney et al. (2021); and to Euphyllophytina by Huang et al. (2022).
Species
Hedeia corymbosa, Y. oblonga (type species)
Species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1935 | Hedeia Cookson |
| 1935 | Yarravia Lang and Cookson |
| 1970 | Hedeia Andrews |
| 1970 | Yarravia Andrews |
| 2021 | Yarravia McSweeney et al. p. 302 |
| 2022 | Yarravia Huang et al. p. 6 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
G. †Yarravia Lang and Cookson 1935
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†Yarravia oblonga Lang and Cookson 1935
Invalid names: Hedeia Cookson 1935 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| F. R. McSweeney et al. 2021 | As per Lang & Cookson (Citation1935), new information in square brackets: [Parent axes naked,? decumbent, branching equally. Fructifications with secondary branch system terminal on parent axes], consisting of a small number of [fusiform] to linear-oval sporangia [arranged radially]. [Fructification made up of several dichotomies emanating from the base of fructification]. [Dichotomies may divide multiple times distally and are terminated in either a fusiform] to elongate-rounded sporangium or a [sterile axis]. [Sporangia borne on the inner side of the fructification, but can occur on the outside], with all [sporangial tips coming to approximately the same level, producing a corymb-like structure]. [Bases of sporangia can occur at different levels, with some sporangia having differing lengths] |
Measurements
No measurements are available
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| Source: superp = superphylum | |||||
| Reference: Kenrick and Crane 1997 | |||||
Collections (8 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Ludlow | Australia (Victoria) | Hedeia gracilis (53660) Hedeia sp. (20754) | |
| Lochkovian | United Kingdom (England) | Y. sp. (10679) | |
| Early/Lower Devonian | France (Lys Valley) | Y. minor (28207) | |
| Pragian | China (Yunnan) | Hedeia sinica (11004) | |
| Pragian - Emsian | Kazakhstan | Hedeia parvula (32851) | |
| Pragian - Middle Devonian | Australia (Victoria) | Hedeia sp., Y. oblonga (20896) | |
| Givetian | USA (Arizona) | Hedeia sp., Y. gorelovii, Y. sp. (22756) |