| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Taxonomy
Hemiarges angustifrons was named by Tripp (1954). Its type specimen is A.3797a, b, a cephalon/head (cranidium), and it is a 3D body fossil. Its type locality is Craighead Quarry, which is in a Caradoc marine mudstone in the Craighead Formation of the United Kingdom.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1954 | Hemiarges angustifrons Tripp |
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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.
†Hemiarges angustifrons Tripp 1954
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: g = genus, f = family, o = order, c = class | |||||
| References: Whittington et al. 1997, Aberhan et al. 2004, Harrington et al. 1959 | |||||
Age range: base of the Burrellian to the top of the Sandbian or 456.60000 to 452.80000 Ma
Collections (6 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Sandbian | United Kingdom (Scotland) | Hemiarges angustifrons (208121 208123 208124 208129) | |
| Caradoc | United Kingdom (Scotland) | Hemiarges angustifrons (type locality: 188938) | |
| Burrellian | United Kingdom (Scotland) | Hemiarges angustifrons (192745) |