| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Polycylindricus
Taxonomy
Polycylindricus was named by Boardman (1960) [Sepkoski's age data: S Ludl D Give-l Sepkoski's reference number: 544,1034,1241]. It is not extant. Its type is Polycylindricus asphinctus.
It was assigned to Trepostomata by Boardman (1960); and to Trepostomida by Sepkoski (2002).
It was assigned to Trepostomata by Boardman (1960); and to Trepostomida by Sepkoski (2002).
Species
P. asphinctus (type species), P. clausus
Is something missing? Join the Paleobiology Database and enter the data
|
|
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. †Polycylindricus Boardman 1960
show all | hide all
†Polycylindricus asphinctus Boardman 1960
†Polycylindricus clausus Boardman 1960
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. S. Boardman 1960 | Dichotomously branching zoaria with
additional small perpendicular secondary branches; zooecia parallel to length of branches and extremely long in neanic zone, progressively compressed away from the center of the branch, in some species zooecia completely constricted and walls coalesce to form a thick-walled cylinder separating neanic and ephebic zones; zooecia in any one zoarium either long and continuous from neanic to ephebic zones or short and limited to ephebic zone; ephebic zones narrow with few diaphragms; zooecial walls leptotrypellid; acan- thopores common, extremely large in diameter, project well beyond surfaces of zoaria; mesopores rare. |