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Cardipeltis
Taxonomy
Cardipeltis was named by Branson and Mehl (1931).
It was assigned to Pteraspidae by Bryant (1932); to Cardipeltidae by Bryant (1933) and Denison (1966); and to Cardipeltiformes by Van Der Laan (2019).
It was assigned to Pteraspidae by Bryant (1932); to Cardipeltidae by Bryant (1933) and Denison (1966); and to Cardipeltiformes by Van Der Laan (2019).
Synonymy list
Year | Name and author |
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1931 | Cardipeltis Branson and Mehl p. 517 figs. Pl. II, Figs. 1, 2, 3, 4, 5 |
1932 | Cardipeltis Bryant p. 227 |
1933 | Cardipeltis Bryant p. 308 |
1966 | Cardipeltis Denison p. 115 |
2019 | Cardipeltis Van Der Laan p. 16 |
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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. †Cardipeltis Branson and Mehl 1931
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†Cardipeltis bryanti Denison 1966
†Cardipeltis richardsoni Denison 1966
†Cardipeltis wallacii Branson and Mehl 1931
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Invalid names: Cardipeltis oblongus Bryant 1933 [synonym], Cardipeltis sinclairi Bryant 1933 [synonym]
Diagnosis
Reference | Diagnosis | |
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W. L. Bryant 1933 | The generic characters as given by the authors are as follows: "Dorsal armor consisting of one subcardiform or triangular plate of large size, with length and width about equal and orbital notches near midlength. The dorsal surface is marked by fine, closely crowded vermiform ridges. Ventral shield unknown." | |
R. H. Denison 1966 | Cardipeltis includes large, rather flat-bodied Heterostraci in which the dorsal shield consists of a large dorsal disc, a rostral region of small plates, and probably a pair of orbital plates. Laterally there are several paired marginal plates with dorsal and ventral laminae. The ventral shield is a mosaic of small plates bouned anteriorly by two or more larger postoral plates. There is a single pair of external branchial openings that notch the dorsal disc deeply. The tail is narrow, slightly longer than the shield, and covered with relatively small scales, except ventrally where they are large and subrectangular. There are no paired or median fins. The superficial ornamentation consists of coarse dentine ridges dorsally, and of large, rounded dentine areas surrounded by very broad ridges ventrally. The lateral line pattern is distinguished by five dorsal transverse commissures, and a much reduced ventral system. The dorsal exoskeleton is 2-3 millimeters or more thick and has a moderately thick spongiosa with rounded chambers arranged somewhat irregularly. |
Measurements
No measurements are available
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Source: subp = subphylum, p = phylum | |||||
Reference: Kiessling 2004 |
Age range: base of the Lochkovian to the top of the Emsian or 419.20000 to 393.30000 Ma
Collections (3 total)
Time interval | Ma | Country or state | Original ID and collection number |
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Lochkovian | USA (Wyoming) | C. richardoni, C. bryanti (153534) | |
Early/Lower Devonian | USA (Wyoming) | C. richardsoni, C. bryanti (26179) | |
Emsian | USA (Wyoming) | C. wallacii (26176) |