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Gunnia
Taxonomy
Gunnia was named by Gatehouse (1968). It is not extant.
It was reranked as Probowmania (Gunnia) by Yuan et al. (1997).
It was assigned to Probowmania by Yuan et al. (1997); and to Ptychopariidae by Kruse (1990), Jell and Adrain (2002).
It was reranked as Probowmania (Gunnia) by Yuan et al. (1997).
It was assigned to Probowmania by Yuan et al. (1997); and to Ptychopariidae by Kruse (1990), Jell and Adrain (2002).
Species
Species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1968 | Gunnia Gatehouse |
| 1990 | Gunnia Kruse p. 13 |
| 1994 | Yiliangaspis Luo |
| 1997 | Probowmania (Gunnia) Yuan et al. |
| 2002 | Gunnia Jell and Adrain p. 381 |
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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.
G. †Gunnia Gatehouse 1968
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†Gunnia smithi Peng et al. 2009
Invalid names: Yiliangaspis Luo 1994 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| P. D. Kruse 1990 | Cranidium subquadrate. Glabella rectangular or truncated conical, with three pairs of glabellar furrows. Occipital ring crescentic. Fixed cheeks approximately as wide as glabella at midlenght. Palpebral lobes of small to moderate size; eye ridges variably developed. Preglabellar field flat to gently convex. Anterior border and preglabellar field subequal in lenght (sag.). Anterior body flat. Facial suture divergent anteriorly from palprebal lobes. Posterolateral limb wider (sag.) than anterior boder. Posterior border furrow distinct.
Thorax with at least 14 segments. Pygidium small, broad; pygidial axis with up to three rings; up to four pleural and interpleural furrows. Pygidial border flat, narrow, poorly defined. |