Basic info Taxonomic history Classification Included Taxa
Morphology Ecology and taphonomy External Literature Search Age range and collections

Heterosphaeridium

Dinophyceae - Gonyaulacales - Gonyaulacaceae

Taxonomy
Heterosphaeridium was named by Cookson and Eisenack (1969). It is not extant.

It was assigned to Gonyaulacaceae by Cookson and Eisenack (1980).

Species
H. conjunctum, H. dificile, H. heteracanthum
Species lacking formal opinion data
H. difficile, H. heterocanthum

Synonymy list
YearName and author
1969Heterosphaeridium Cookson and Eisenack
1980Heterosphaeridium Cookson and Eisenack

Is something missing? Join the Paleobiology Database and enter the data

RankNameAuthor
—Life
—Eukaryota()
—Chromalveolata
—Alveolata
—Myzozoa
subphylumDinozoa
RankNameAuthor
superclassDinoflagellata
classDinophyceae
orderGonyaulacales
familyGonyaulacaceae
genusHeterosphaeridiumCookson and Eisenack 1969

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. †Heterosphaeridium Cookson and Eisenack 1969
show all | hide all
†Heterosphaeridium conjunctum Cookson and Eisenack 1968
†Heterosphaeridium dificile Ioannides 1986
†Heterosphaeridium heteracanthum Eisennack and Kjellström 1972
Diagnosis
No diagnoses are available
Measurements
No measurements are available
No ecological data are available

Age range: base of the Valanginian to the top of the Campanian or 137.05000 to 72.20000 Ma

Collections (28 total)


Time interval Ma Country or state Original ID and collection number
Valanginian - Barremian137.05 - 121.4Chile (Doceava Región) H. heteracanthum (150034)
Albian - Cenomanian113.2 - 93.9Antarctica H. heteracanthum (153423)
Cenomanian100.5 - 93.9Antarctica H. heteracanthum (153428) H. sp., H. heteracanthum (153426)
Late/Upper Turonian - Early/Lower Coniacian93.9 - 85.7Antarctica H. heteracanthum (169324 169325 169326)
Coniacian - Early/Lower Santonian89.8 - 83.6Antarctica H. heteracanthum (169335 169338 169339 169340 169341 169342 169343 169344 169346 169348 169349 169351 169352) H. heterocanthum (169327 169328)
Santonian - Campanian85.7 - 72.2Antarctica H. heteracanthum (169354) H. sp., H. heteracanthum, H. conjunctum, H. dificile (150509)
Campanian83.6 - 72.2Canada (Nunavut) H. difficile (36383)
Campanian83.6 - 72.2Antarctica H. heteracanthum (153425)
Campanian83.6 - 72.2Canada (Northwest Territories) H. difficile (36384)
Campanian - Maastrichtian83.6 - 66.0Antarctica H. heteracanthum (153427)