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Cricocosmiidae
Taxonomy
Cricocosmiidae is a family. It is not extant.
It was assigned to Cricocosmida by Han et al. (2007); and to Palaeoscolecidomorpha by Shi et al. (2022).
It was assigned to Cricocosmida by Han et al. (2007); and to Palaeoscolecidomorpha by Shi et al. (2022).
Subtaxa
Synonymy list
| Year | Name and author |
|---|---|
| 2007 | Cricocosmiidae Han et al. |
| 2022 | Cricocosmiidae Shi et al. p. 4 |
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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.
Fm. †Cricocosmiidae
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G. †Houscolex
G. †Tabelliscolex Han et al. 2003
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†Tabelliscolex chengjiangensis Han et al. 2007
†Tabelliscolex hexagonus Han et al. 2003
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| X. Shi et al. 2022 | Palaeoscolecidomorphs with serially repeated arrangements of macroscopic trunk sclerites and corresponding paired ventral projections (at least in Cricocosmia and Tabelliscolex), a single pair of terminal posterior hooks and a posterior unarmed region of the introvert. Trunk sclerites composed of many tubercles of equal size on the outer surface with corresponding pits on the inner surface (at least in Cricocosmia and Tabelliscolex). |
Measurements
No measurements are available
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| Source: p = phylum | |||||
| Reference: Hendy et al. 2009 | |||||
Age range: base of the Meishucunian to the top of the Atdabanian or 530.70000 to 516.00000 Ma
Collections (28 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Caerfai - St Davids | China (Yunnan) | Cricocosmia jinningensis (9939) | |
| Meishucunian | China (Shaanxi) | Houscolex lepidotus, Houscolex sp. (6851) | |
| Atdabanian | China (Yunnan) | Cricocosmia jiningensis (86851) Cricocosmia jiningensis, Tabelliscolex hexagonus (86845) Cricocosmia jiningensis, Tylotites petiolaris, Tabelliscolex hexagonus (68083) Cricocosmia jinningensis (90133 90135 90136 90137 90149 90150 90151 90164 90165) Cricocosmia sp. (86929) | |
| Nangaoian | China (Yunnan) | Cricocosmia jinningensis (132329 132330 194140 194141 194143 194150 194153 194155 194160 194161 194162 194163) Tabelliscolex hexagonus, Cricocosmia jinningensis (132327) |