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Helohyus
Taxonomy
Helohyus was named by Marsh (1872). Its type is Helohyus plicodon.
It was assigned to Helohyinae by Gazin (1955) and Stucky (1998); to Helohyidae by Marsh (1877), Hay (1902), Coombs and Coombs (1977), Carroll (1988), Ferrusquía-Villafranca (2006) and Foss (2007); and to Cetaceamorpha by Spaulding et al. (2009).
It was assigned to Helohyinae by Gazin (1955) and Stucky (1998); to Helohyidae by Marsh (1877), Hay (1902), Coombs and Coombs (1977), Carroll (1988), Ferrusquía-Villafranca (2006) and Foss (2007); and to Cetaceamorpha by Spaulding et al. (2009).
Synonyms
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Synonymy list
Year | Name and author |
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1870 | Thinotherium Cope p. 292 |
1872 | Thinotherium Marsh |
1872 | Helohyus Marsh p. 207 |
1877 | Helohyus Marsh p. 38 |
1878 | Ithygrammodon cameloides Osborn et al. p. 57 |
1902 | Helohyus Hay p. 650 |
1902 | Thinotherium Hay p. 661 |
1902 | Ithygrammodon cameloides Hay p. 674 |
1914 | Lophiohyus Sinclair |
1955 | Helohyus Gazin p. 37 |
1977 | Helohyus Coombs and Coombs p. 292 |
1988 | Helohyus Carroll p. 639 |
1997 | Lophiohyus McKenna and Bell p. 403 |
1998 | Helohyus Stucky p. 369 |
2006 | Helohyus Ferrusquía-Villafranca p. 995 |
2007 | Helohyus Foss p. 86 |
2009 | Helohyus Spaulding 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.
G. †Helohyus Marsh 1872
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Invalid names: Ithygrammodon cameloides Osborn et al. 1878 [nomen dubium], Lophiohyus Sinclair 1914 [synonym], Thinotherium Cope 1870 [synonym], Thinotherium Marsh 1872 [synonym]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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Source: g = genus, o = order, subc = subclass, c = class, subp = subphylum | |||||
References: Spaulding et al. 2009, Lillegraven 1979, Carroll 1988, Nowak 1999, Hendy et al. 2009 |
Age range: base of the Middle Eocene to the top of the Uintan or 47.80000 to 39.70000 Ma
Collections (36 total)
Time interval | Ma | Country or state | Original ID and collection number |
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Bridgerian | USA (Wyoming) | H. lentus (16236) H. lentus, H. milleri (16449) H. milleri (16151 16155 16157 16159 16161 16172) H. milleri, H. plicodon (16193) H. plicodon (16133 16143 16150 16152 16154 16156 16166 16168 16177 16182 16190 16228 16234 16255 16278 16294 16402 16406 16448) H. sp. (16087 16430) H. validus (16137 16205 16423) | |
Middle Eocene | China (Jiangsu) | H. sp. (37493) | |
Early/Lower Uintan | USA (Texas) | H. lentus (16196) | |
Uintan | USA (Texas) | H. sp. (16652) |