Basic info | Taxonomic history | Classification | Included Taxa |
Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Taxonomy
Baena hayi was named by Gilmore (1916). Its type specimen is USNM 6728, a shell (a carapace and plastron), and it is a 3D body fossil. Its type locality is Niobrara County, United States Geological Survey, which is in a Maastrichtian terrestrial horizon in the Lance Formation of Wyoming.
Synonymy list
Year | Name and author |
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1916 | Baena hayi Gilmore p. 641 figs. Pl. 32-33 |
1930 | Baena hayi Hay p. 72 |
1972 | Baena hayi Gaffney pp. 301-302 |
2015 | Baena hayi Joyce and Lyson |
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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.
†Baena hayi Gilmore 1916
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Diagnosis
Reference | Diagnosis | |
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E. S. Gaffney 1972 | "Baena hayi is distinguished at once from all other species of the genus by the proportion of the carapace, it being the only one known in which the width exceeds the breadth. From B. marshi this species may be distinguished by having a sculptured carapace, and the wider marginal areas on the ventral surface. From B. hatcheri it differs in the contour of the shell, being short and truncated at both ends, whereas B. hatcheri is relatively long, with a somewhat pointed anterior end. The absence of supernumerary scutes lateral to the first vertebral also serves further to istinguish it from the latter species" (Gilmore, 1916b, p. 643). |
Measurements
No measurements are available
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Source: g = genus, c = class, subp = subphylum | |||||
References: Holroyd et al. 2001, Hendy et al. 2009, Kiessling 2004, Carroll 1988 |
Age range: Late/Upper Maastrichtian or 72.20000 to 66.00000 Ma
Collections: one only
Time interval | Ma | Country or state | Original ID and collection number |
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Late/Upper Maastrichtian | USA (Wyoming) | Baena hayi (type locality: 122902) |