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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) and 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) and Jell and Adrain (2002).
Species
Species lacking formal opinion data
Synonyms
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Synonymy list
Year | Name and author |
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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 | |
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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. |
Measurements
No measurements are available
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Source: f = family, c = class | |||||
References: Aberhan et al. 2004, Hendy 2009 |
Age range: base of the Duyunian to the top of the Taijangian or 514.00000 to 504.50000 Ma
Collections (19 total)
Time interval | Ma | Country or state | Original ID and collection number |
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Duyunian | China (Anhui) | Yiliangaspis tumida (125435) | |
Duyunian | China (Guizhou) | Probowmania sp. (125154) | |
Taijangian | China (Guizhou) | Probowmania sp. (125159 125169) | |
Middle Cambrian | India | G. smithi (116541 116542 116543) G. sp. 1 (116544) G. sp. 2 (116466) | |
Middle Cambrian | Australia (Northern Territory) | G. concava (60080) G. lutea (60015 60019 60033 60035 60046 60076 60078) G. lutea, G. concava (60045 60083) |