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| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Taxonomy
Hedstroemia kutchini was named by Ludvigsen and Tripp (1990). Its type specimen is ROM 45347, a cephalon/head, and it is a 3D body fossil. Its type locality is Hedstroemia Assemblage at Prongs Creek, Yukon Territory, which is in a Ludlow deep subtidal shelf carbonate in the Road River Formation of Canada.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1990 | Hedstroemia kutchini Ludvigsen and Tripp pp. 15 - 17 figs. Pl. 6, figs. 1-14 |
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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.
†Hedstroemia kutchini Ludvigsen and Tripp 1990
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. Ludvigsen and R. P. Tripp 1990 | Cephalon with intramarginal ridge between field and border. Genal spine absent. Pygidium elongate with nine rings and eight pairs of pleurae. Prosopon finely
granular. |
Measurements
No measurements are available
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| Source: f = family, o = order, c = class | |||||
| References: Aberhan et al. 2004, Hendy 2009, Fortey and Owens 1999 | |||||
Age range: Ludfordian or 425.00000 to 422.70000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Ludlow | Canada (Yukon) | Hedstroemia kutchini (type locality: 23078) | |
| Ludfordian | Canada (Northwest Territories) | Hedstroemia kutchini (25495) |