| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Simplicidium
Taxonomy
Simplicidium was named by Todd et al. (1997). Its type is Cellaria smithii.
It was assigned to Arachnidiidae by Todd et al. (1997), Taylor and Wilson (1999).
It was assigned to Arachnidiidae by Todd et al. (1997), Taylor and Wilson (1999).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1997 | Simplicidium Todd et al. p. 206 |
| 1999 | Simplicidium Taylor and Wilson p. 828 |
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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. †Simplicidium Todd et al. 1997
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†Simplicidium brandesi Voigt 1968
†Simplicidium smithii Phillips 1829
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. A. Todd et al. 1997 | Arachnidiid with a colony varying from linear and rarely branching to compact and densely branching, covering much of the substrate. Branches fairly straight, distally budded, termination due to collisions frequent. Autozooids pear-shaped to an elongate tear-shape in outline; poorly differentiated, with a cauda of negligible to three-quarters capitulum length. Distal and distolateral pore chambers present. Cystid appendages absent. Frontal wall moderately to highly inflated; smooth; when compressed during immuration may display distinct, depressed marginal areas. Peristome present as a slightly raised rim around an open circular to sub-circular orifice situated at four-fifths to five-sixths of capitulum length. Triangular abutment kenozooids frequent. Polarity loss absent. |
Measurements
No measurements are available
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| Source: c = class, p = phylum, uc = unranked clade | |||||
| References: Smith et al. 2006, Nesnidal et al. 2013, Kiessling 2004 | |||||
Age range: base of the Bathonian to the top of the Late/Upper Berriasian or 168.20000 to 137.05000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Bathonian | USA (Utah) | S. sp. (214139) | |
| Late/Upper Berriasian | Ukraine | S. brandesi (214153) |