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Singhia
Taxonomy
Singhia was named by Srivastava (1967) [Type species. Singhia diversus (Stover) Srivastava 1967.]. It is not extant.
It was assigned to Gymnospermopsida by Srivastava (1967).
It was assigned to Gymnospermopsida by Srivastava (1967).
Synonymy list
Year | Name and author |
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1967 | Singhia Srivastava |
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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. †Singhia Srivastava 1967
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†Singhia acicularis Lima 1980
†Singhia crenulata de Lima 1980
†Singhia elongata de Lima 1980
†Singhia minima Lima 1980
†Singhia montanaensis Lima 1980
†Singhia multicostata Lima 1980
†Singhia punctata de Lima 1980
†Singhia reyrei de Lima 1980
†Singhia urwashii Srivastava 1967
Diagnosis
Reference | Diagnosis | |
---|---|---|
S. K. Srivastava 1967 | colpate pollen grains ; ellipsoidal, polyplicate, many ridges and furrows converging toward the longitudinal ends, ridges gently rounded or angular, branched and may be interconnected; furrows alternate with ridges, do not extend to longitudinal ends where ridges coalesce, nsnfossulate; exine double layered, sexine thick, nexine thin; ridges coalesce at the longitudinal ends and a smooth area (apoptychia) present at the longitudinal ends with thick exine; longitudinal ends narrow, rounded or conical. |