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Taxonomy
Arca (Scapharca) hopkinsi was named by Pilsbry and Olsson (1941). It is not a trace fossil. Its type locality is Zone J - Canoa Formation, which is in a Piacenzian/Gelasian coastal sandstone/claystone in the Canoa Formation of Ecuador.
Sister species lacking formal opinion data
Anadara guajirensis, Anadara suzukii, A. bellonii, A. bravoensis, A. cancellata, A. carinata, A. gurgitis, A. limatella, A. macnairyensis, A. montensis, A. nana, A. pakistanica, A. pergracilis, A. securiculata, A. tailleburgensis, A. triasina, A. halmyrus, A. montensis, A. fruthi, A. stillicidum, A. mikkula, A. waltonia, A. fracta, A. gabrielis, A. veatchi, Scapharca agraria, Scapharca agronomica, Scapharca chordicosta, Scapharca japonica, Scapharca natalensis, Scapharca pertenuicostata, Scapharca recondita
Synonymy list
| Year | Name and author |
|---|---|
| 1941 | Arca (Scapharca) hopkinsi Pilsbry and Olsson |
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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.
†Arca (Scapharca) hopkinsi Pilsbry and Olsson 1941
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: subf = subfamily, f = family | |||||
| References: Hendy et al. 2009, Mikkelsen and Bieler 2008 | |||||
Age range: base of the Piacenzian to the top of the Gelasian or 3.60000 to 1.80000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Piacenzian - Gelasian | Ecuador (Manabi) | Arca hopkinsi (type locality: 51878) |