Source Data | |
---|
Rank | species (PBDB) |
---|
Taxonomy (PBDB) | Life : Callaiosphaeridium : Callaiosphaeridium asymmetricum |
---|
Classification (PBDB,GBIF) | Rank | Name | Author |
---|
genus | Callaiosphaeridium | Davey and Williams 1966 | species | Callaiosphaeridium asymmetricum | Clarke and Verdier 1967 |
|
---|
Opinions (PBDB) | Name | Rank | Opinion | Evidence | Author |
---|
Callaiosphaeridium asymmetricum | species | belongs to Callaiosphaeridium | stated with evidence | Davey and Williams, 1966 |
|
---|
Status (PBDB) | extinct |
---|
Taxon Size (PBDB) | 1 |
---|
First Recorded Appearance | 136 - 130 Ma Early/Lower Cretaceous |
---|
Last Recorded Appearance | 86.3 - 72.1 Ma Late/Upper Cretaceous |
---|
Primary Reference (PBDB) | J. M. Keating. 1992. Palynology of the Lachman Crags Member, Santa Marta Formation (Upper Cretaceous) of north-west James Ross Island. Antartic Science 4(3):293-304 |
---|