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Tisoa
Taxonomy
Synonymy list
| Year | Name and author |
|---|---|
| 1840 | Tisoa de Serres |
| 1975 | Tisoa Hantzschel |
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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. †Tisoa de Serres 1840
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. Hantzschel 1975 | Vertical U-shaped cylindrical tubes with closely appressed limbs; individual tubes 2 to 3 mm in diameter, lying 1 to 15 mm apart, rarely branched; principally form axis of elongated conical concretions 1 m or more long; basal part of “U” commonly not preserved; burrow walls usually lined, occasionally striated; transitional forms difficult to distinguish from Arenicolites. |