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

Polycylindricus

Stenolaemata - Trepostomata

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).

Synonymy list
YearName and author
1960Polycylindricus Boardman p. 51
2002Polycylindricus Sepkoski, Jr.

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

RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
RankNameAuthor
Polyzoa
phylumBryozoaEhrenberg 1831
classStenolaemataBorg 1926
orderTrepostomataUlrich 1882
genusPolycylindricus

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.

Diagnosis
ReferenceDiagnosis
R. S. Boardman 1960Dichotomously 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.