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Xenascus
Taxonomy
Xenascus was named by Cookson and Eisenack. It is not extant.
It was assigned to Ceratiaceae by Eisenack (1969).
It was assigned to Ceratiaceae by Eisenack (1969).
Synonymy list
| Year | Name and author |
|---|---|
| 1969 | Xenascus Eisenack |
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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. †Xenascus Cookson and Eisenack
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†Xenascus australensis Cookson and Eisenack 1969
†Xenascus australis Cookson and Eisenack 1960
†Xenascus ceratioides Lentin and Williams 1973
†Xenascus ghanaensis Masure et al. 1998
†Xenascus gochtii Stover and Evitt 1978
†Xenascus perforatum Lentin and Vozzhennikova 1990
†Xenascus plotei Below 1981
†Xenascus sarjeantii Stover and Evitt 1978
Diagnosis
No diagnoses are available
Measurements
No measurements are available
No ecological data are available
Age range: base of the Early/Lower Cenomanian to the top of the Campanian or 99.60000 to 72.10000 Ma
Collections (29 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Albian - Cenomanian | Antarctica | X. australensis (153423) | |
| Early/Lower Cenomanian | Egypt (north Western Desert) | X. ceratioides (140415 140420) | |
| Middle Turonian - Late/Upper Turonian | Egypt (north Western Desert) | X. ceratioides (140388) | |
| Coniacian | Antarctica | X. australensis (150208) | |
| Coniacian - Santonian | Egypt (north Western Desert) | X. ceratioides (140379 140385) | |
| Coniacian - Early/Lower Santonian | Antarctica | X. spp. (169329 169330 169331 169332 169334 169335 169337 169338 169339 169340 169341 169342 169343 169344 169346 169348 169349 169351 169352) | |
| Santonian - Campanian | Antarctica | X. australensis (150509) | |
| Campanian - Maastrichtian | Antarctica | X. australensis (153427) | |
| Late/Upper Campanian | Antarctica | X. australensis, X. ceratioides, X. gochtii, X. sarjeantii (150182) |