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Taxonomy
Proetus (Gerastos) sugiharensis was named by Kobayashi and Hamada (1974). Its type specimen is PAt 7375, a pygidium, and it is a 3D body fossil. Its type locality is Loc. 3. Ys 15. Gomi Quarry, which is in a Ludlow reef, buildup or bioherm reef rocks in the Fukata Formation of Japan.
It was recombined as Hedstroemia sugiharensis by Adrain (1997) and Stocker et al. (2019).
It was recombined as Hedstroemia sugiharensis by Adrain (1997) and Stocker et al. (2019).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1974 | Proetus (Gerastos) sugiharensis Kobayashi and Hamada p. 116 |
| 1997 | Hedstroemia sugiharensis Adrain p. 35 |
| 2019 | Hedstroemia sugiharensis Stocker et al. pp. 223 - 224 fig. 7A–C |
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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 sugiharensis Kobayashi and Hamada 1974
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| C. P. Stocker et al. 2019 | Pygidium strongly convex (tr.) with long (sag.), convex border and broad, gently tapering axis with ten rings plus terminal piece. Pleural lobe with seven ribs with a scalloped profile and distinct pleural furrows. Pygidial sculpture finely granulose. |
Measurements
No measurements are available
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| Source: f = family, o = order, c = class | |||||
| References: Hendy 2009, Aberhan et al. 2004, Fortey and Owens 1999 | |||||