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Opsiconidion
Taxonomy
Opsiconidion was named by Ludvigsen (1974) [Sepkoski's age data: O Ashg-l D Fras Sepkoski's reference number: 1066]. It is not extant.
It was assigned to Biernatinae by Holmer (1989); to Atrypida by Sepkoski (2002); and to Biernatidae by Williams et al. (2000), Cocks (2019).
It was assigned to Biernatinae by Holmer (1989); to Atrypida by Sepkoski (2002); and to Biernatidae by Williams et al. (2000), Cocks (2019).
Species
Species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1974 | Opsiconidion Ludvigsen |
| 1989 | Opsiconidion Holmer |
| 2000 | Opsiconidion Williams et al. p. 131 |
| 2002 | Caenotreta Sepkoski |
| 2002 | Opisconidion Sepkoski |
| 2019 | Opsiconidion Cocks p. 34 |
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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. †Opsiconidion Ludvigsen 1974
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†Opsiconidion decessus Mergl 2001
†Opsiconidion nanus Mergl 2019
†Opsiconidion praecursor Popov et al. 1994
Invalid names: Caenotreta [synonym]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: g = genus, o = order, c = class, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Hendy 2009, Aberhan et al. 2004 | |||||
Collections (25 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Llandeilo | United Kingdom (Wales) | O. nudum (216511) | |
| Mohawkian | USA (New York) | O. praecursor (173686) | |
| Vormsi | Estonia | O. praecursor (173697 173699) | |
| Pirgu | Estonia | O. praecursor (173703 173704 173706 173707 173709 173710 173711) | |
| Llandovery | Australia (New South Wales) | O. ephemerus, O. sp. (190507 190508 190511 190512) | |
| Aeronian | United Kingdom | Caenotreta aldridgei (72280 72281) | |
| Telychian | Austria | Caenotreta celloni, Caenotreta sp. (72282) | |
| Telychian | United Kingdom | Caenotreta aldridgei (72278 72279) | |
| Wenlock - Ludlow | Austria | Caenotreta sp. (72283) | |
| Gorstian | Czechia | Caenotreta sp. (14106) | |
| Late/Upper Emsian | USA (Alaska) | O. sp. (3948) | |
| Eifelian | Czechia | O. decessus (203874) O. decessus, O. nanus (62172) |