| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Quasiaulacera
Taxonomy
Quasiaulacera was named by Copper et al. (2013). It is not extant. Its type is Quasiaulacera occidua.
It was assigned to Aulaceratidae by Copper et al. (2013).
It was assigned to Aulaceratidae by Copper et al. (2013).
Species
Q. occidua (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 2013 | Quasiaulacera Copper et al. pp. 670 - 671 |
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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.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| P. Copper et al. 2013 | Large, columnar, non-branching aulaceratids, generally fluted on outside, up to ∼2 to 3 m long, 20 to 40 cm in diameter. Small, immature specimens may be smooth on outside. Skeleton consisting of three layers: central axial zone with cyst-plates occupying about 20 to 50 percent of the skeleton, surrounded by envelope of microcyst-plates, and ultimately covered by outer layer of multiple, thin, concentric laminae, penetrated by thick, radiating, superposed pillars. Outer surface has papillose appearance due to penetration of pillars through laminae. Growth stages marked by ontogenetically early slender smooth columnar form with large axial column, until that reaches diameter of up to 2 to 3 cm. Beyond that stage, microcyst-plates and outer laminar layers become fluted. Astrorhizae unknown. |
Measurements
No measurements are available
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| Source: o = order | |||||
| Reference: Kiessling 2004 | |||||
Age range: Hirnantian or 445.20000 to 443.10000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Hirnantian | Canada (Quebec) | Q. occidua (113323) Q. stellata (158771) |