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Posicomta advena
Taxonomy
Composita advena was named by Grant (1976). Its type specimen is USNM 212860, a shell (Articulated shell), and it is not a trace fossil.
It was recombined as Posicomta advena by Grunt (1986), Viaretti et al. (2022).
It was recombined as Posicomta advena by Grunt (1986), Viaretti et al. (2022).
Synonymy list
| Year | Name and author |
|---|---|
| 1976 | Composita advena Grant pp. 205-206 figs. Pl 56, figs 1-60 |
| 1986 | Posicomta advena Grunt |
| 2010 | Composita advena Verna and Angiolini p. 333 figs. Pl 2, figs 21-26 |
| 2022 | Posicomta advena Viaretti et al. p. 674 figs. Pl 3, figs 69-71 |
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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.
†Posicomta advena Grant 1976
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Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| shell height | 58 | 3.19 | 0.800 | 7.60 | 3.50 | 1.74 |
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| Source: subo = suborder, c = class, p = phylum, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Aberhan et al. 2004 | |||||
Age range: base of the Kungurian to the top of the Capitanian or 283.30000 to 259.51000 Ma
Collections (20 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Kungurian | Oman | Posicomta advena (166923) | |
| Roadian | Thailand (Trang) | Composita advena (40869 40870 40872 40873 40874 40875 40876 40877 40878 40879 40894 40896 40897 40898 40899) | |
| Capitanian | Tunisia | Composita advena (107086 107087 107088 107091) |