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Megalichthys
Taxonomy
Megalichthys was named by Agassiz (1835).
It was assigned to Osteolepidae by Woodward (1891), Eastman (1903) and Heintz (1934); to Megalichthyinae by Borgen and Nakrem (2016); and to Megalichthyidae by Hay (1902) and Downs and Daeschler (2020).
It was assigned to Osteolepidae by Woodward (1891), Eastman (1903) and Heintz (1934); to Megalichthyinae by Borgen and Nakrem (2016); and to Megalichthyidae by Hay (1902) and Downs and Daeschler (2020).
Synonyms
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Synonymy list
Year | Name and author |
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1835 | Megalichthys Agassiz p. 202 |
1848 | Centrodus M'Coy p. 3 |
1856 | Rhizodus angustus Newberry |
1856 | Rhizodus incurvus Newberry |
1888 | Rhizodus anceps Newberry |
1891 | Megalichthys Woodward p. 378 |
1902 | Megalichthys Hay p. 359 |
1902 | Megalichthys anceps Hay p. 360 |
1902 | Megalichthys angustus Hay p. 360 |
1902 | Megalichthys incurvus Hay p. 360 |
1903 | Megalichthys Eastman p. 187 |
1934 | Megalichthys Heintz p. S181 |
2016 | Megalichthys Borgen and Nakrem |
2020 | Megalichthys Downs and Daeschler p. 3 |
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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. †Megalichthys Agassiz 1835
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†Megalichthys coccolepis Young 1870
†Megalichthys hibberti Agassiz 1835
†Megalichthys intermedius Woodward 1891
†Megalichthys laevis Traquair 1890
†Megalichthys laticeps Traquair 1884
†Megalichthys macropoma Cope 1892
†Megalichthys maxillaris Agassiz 1843
†Megalichthys mullisoni Downs and Daeschler 2020
†Megalichthys nitens Fritsch 1889
†Megalichthys priscus Agassiz 1843
†Megalichthys pygmaeus Traquair 1841
†Megalichthys rugosus Young 1870
Invalid names: Centrodus M'Coy 1848 [synonym], Megalichthys anceps Newberry 1888 [nomen oblitum], Megalichthys angustus Newberry 1856 [nomen oblitum], Megalichthys incurvus Newberry 1856 [nomen oblitum]
Diagnosis
Reference | Diagnosis | |
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J. P. Downs and E. B. Daeschler 2020 | Megalichthyid referred to Megalichthys by exhibiting the following characters: an elongated caudal process of the premaxilla’s medial margin that reaches or nearly reaches the vomer and positions the premaxillary tusk lingual to a continuous premaxillary marginal tooth row; an enlarged dentary fang lingual to a continuous dentary marginal tooth row; and the complete lack of a labial lamina and marginal denti- tion on all three coronoids. |
Measurements
No measurements are available
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Source: subp = subphylum, p = phylum | |||||
References: Carroll 1988, Kiessling 2004 |
Age range: base of the Famennian to the top of the Cisuralian or 372.20000 to 273.01000 Ma
Collections (9 total)
Time interval | Ma | Country or state | Original ID and collection number |
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Famennian | USA (Pennsylvania) | M. mullisoni (196360) | |
Arundian | United Kingdom (Scotland) | M. sp. (90682) | |
Asbian | United Kingdom (Scotland) | M. sp. (230478) | |
Pennsylvanian | United Kingdom | Centrodus striatulus (132777) M. hibberti (132730 132731) | |
Westphalian B | United Kingdom (Flintshire) | M. hibberti (233401) | |
Moscovian | United Kingdom | M. pygmaeus (137309) | |
Cisuralian | Norway (Akhershus) | M. sp. (125173) |