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Arachnidiidae
Taxonomy
Arachnidiidae was named by Hincks (1880). It is extant. Its type is Arachnidium.
It was assigned to Paludicellea by Bassler (1953); and to Ctenostomata by Taylor and Wilson (1999).
It was assigned to Paludicellea by Bassler (1953); and to Ctenostomata by Taylor and Wilson (1999).
Subtaxa
Arachnidium (type genus), Simplicidium
Synonymy list
| Year | Name and author |
|---|---|
| 1880 | Arachnidiidae Hincks |
| 1953 | Arachnidiidae Bassler p. G33 |
| 1999 | Arachnidiidae 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.
Fm. Arachnidiidae Hincks 1880
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G. †Simplicidium Todd et al. 1997
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†Simplicidium brandesi Voigt 1968
†Simplicidium smithii Phillips 1829
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: c = class, p = phylum, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Kiessling 2004, Smith et al. 2006 | |||||
Age range
Maximum range based only on fossils: base of the Bathonian to the top of the Late/Upper Berriasian or 168.20000 to 137.05000 Ma
Minimum age of oldest fossil (stem group age): 165.3 Ma
Minimum age of oldest fossil (stem group age): 165.3 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Bathonian | USA (Utah) | Simplicidium sp. (214139) | |
| Late/Upper Berriasian | Ukraine | Simplicidium brandesi (214153) |