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Isorthis (Arcualla)
Taxonomy
Arcualla was named by Walmsley and Boucot (1975). Its type is Orthis (Dalmanella) arcuaria.
It was reranked as Isorthis (Arcualla) by Williams et al. (2000).
It was assigned to Isorthis by Williams et al. (2000); and to Orthida by Sepkoski (2002).
It was reranked as Isorthis (Arcualla) by Williams et al. (2000).
It was assigned to Isorthis by Williams et al. (2000); and to Orthida by Sepkoski (2002).
Species lacking formal opinion data
Arcualla cliens, Isorthis allani, Isorthis allani, Isorthis angaciensis, Isorthis biradiata, Isorthis bistria, Isorthis canalicula, Isorthis cliens, Isorthis cliens, Isorthis clivosa, Isorthis crassiformis, Isorthis cuyanum, Isorthis elivosa, Isorthis fornicatimcurvata, Isorthis impressiva, Isorthis inostranzewi, Isorthis jini, Isorthis manon, Isorthis markovskii, Isorthis megamyaria, Isorthis miloni, Isorthis minuta, Isorthis mongolensis, Isorthis neocrassa, Isorthis numiformis, Isorthis nummiformis, Isorthis orbicularis, Isorthis orbicularris, Isorthis ovalis, Isorthis palliata, Isorthis perelegans, Isorthis pinguissima, Isorthis proinqua, Isorthis propinqua, Isorthis qianbeiensis, Isorthis rotunda, Isorthis rotunda, Isorthis schurabica, Isorthis snajdri, Isorthis spedeni, Isorthis spedeni, Isorthis sulcata, Isorthis svatojanica, Isorthis tannuolis, Isorthis tetragona, Isorthis tomyris, Isorthis tomyris, Isorthis tomyris, Isorthis usari, Isorthis walmsleyi
Synonymy list
| Year | Name and author |
|---|---|
| 1975 | Arcualla Walmsley and Boucot |
| 2000 | Isorthis (Arcualla) Williams et al. p. 788 |
| 2002 | Arcualla Sepkoski |
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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.
Subg. †Isorthis (Arcualla) Walmsley and Boucot 1975
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†Isorthis (Arcualla) arcuaria Hall and Clarke 1892
†Isorthis (Arcualla) boreaina Zhang 1989
†Isorthis (Arcualla) microscapha Johnson et al. 1976
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: g = genus, f = family, c = class, p = phylum, uc = unranked clade | |||||
| References: Hendy et al. 2009, Nesnidal et al. 2013, Aberhan et al. 2004, Williams et al. 2000 | |||||
Age range: base of the Telychian to the top of the Zlichovian or 438.60000 to 393.47000 Ma
Collections (38 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Llandovery - Wenlock | Venezuela | Isorthis arcuaria (25066) | |
| Telychian | Canada (Ontario) | Isorthis sp. (77335) | |
| Wenlock - Ludlow | Canada (Northwest Territories) | Isorthis microscapha, Isorthis boreaina (26049) | |
| Whitwellian | Canada (Northwest Territories) | Isorthis boreaina (26035) Isorthis microscapha, Isorthis boreaina (26042 26058) | |
| Homerian | Czechia | Arcualla cliens (14095) Isorthis cliens (14098) | |
| Gorstian | Czechia | Isorthis manon, Isorthis nummiformis (14104) Isorthis sp. (14049) | |
| Gorstian | USA (Oklahoma) | Isorthis arcuaria (170221) | |
| Ludlow | Venezuela | Isorthis arcuaria (25067) | |
| Ludlow | USA (Oklahoma) | Isorthis arcuaria (26823 170242 170245 170246 170253) | |
| Ludlow - Pridoli | USA (Oklahoma) | Isorthis arcuaria (170222 170225 170228 170238 170240 170241 170247) | |
| Ludfordian | Czechia | Isorthis numiformis (14057) Isorthis tomyris (14110) | |
| Ludfordian | USA (Oklahoma) | Isorthis arcuaria (170224) | |
| Ludfordian - Pridoli | USA (Oklahoma) | Isorthis arcuaria (26824) | |
| Pridoli | USA (Oklahoma) | Isorthis arcuaria (170244 170254 170263 170264 170266) | |
| Pridoli | USA (Indiana) | Isorthis arcuaria (24881) | |
| Pragian | Czechia (Prague) | Isorthis pinguissima (12071) | |
| Pragian | Czechia | Isorthis pinguissima (12101) | |
| Pragian | Australia (New South Wales) | Isorthis minuta (25695) | |
| Zlichovian | Czechia (Barrandia) | Isorthis biradiata (12112) |