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Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Holocephalina trapezia
Taxonomy
Holocephalina trapezia was named by Yang et al. (1993). It is not extant. Its type locality is Xiuzigou, bed 4, which is in a Taijangian offshore shelf limestone in the Fengjia'ao Formation of China.
Sister species lacking formal opinion data
Synonymy list
Year | Name and author |
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1993 | Holocephalina trapezia Yang et al. |
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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.
†Holocephalina trapezia Yang et al. 1993
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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Source: f = family, c = class | |||||
References: Whittington et al. 1997, Aberhan et al. 2004 |
Age range: Taijangian or 513.00000 to 505.00000 Ma
Collections: one only
Time interval | Ma | Country or state | Original ID and collection number |
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Taijangian | China (Henan) | Holocephalina trapezia (type locality: 127072) |