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Acutiramus
Taxonomy
Acutiramus was named by Ruedemann (1935) [Sepkoski's age data: S Prid D Gedi Sepkoski's reference number: 360]. It is not extant. Its type is Pterygotus cummingsi.
It was reranked as Pterygotus (Acutiramus) by Kjellesvig-Waering and Caster (1955), Størmer (1955).
It was assigned to Pterygotus by Kjellesvig-Waering and Caster (1955), Størmer (1955); to Eurypterida by Sepkoski (2002); and to Pterygotidae by Dunlop et al. (2013), Dunlop et al. (2020), Lamsdell (2025).
It was reranked as Pterygotus (Acutiramus) by Kjellesvig-Waering and Caster (1955), Størmer (1955).
It was assigned to Pterygotus by Kjellesvig-Waering and Caster (1955), Størmer (1955); to Eurypterida by Sepkoski (2002); and to Pterygotidae by Dunlop et al. (2013), Dunlop et al. (2020), Lamsdell (2025).
Species
A. bohemicus (syn. Pterygotus mediocris, Pterygotus blahai, Pterygotus comes), A. cummingsi (syn. Pterygotus buffaloensis, Pterygotus quadraticaudatus, Pterygotus acuticaudatus), A. floweri, A. macrophthalmus (syn. Pterygotus osborni, Pterygotus juvenis), A. nobilis (syn. Pterygotus nobilis), A. perneri, A. perryensis, A. suwanneensis
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1889 | Bunodella Matthew |
| 1935 | Acutiramus Ruedemann |
| 1955 | Pterygotus (Acutiramus) Kjellesvig-Waering and Caster p. 1046 |
| 1955 | Bunodella Størmer p. 17 |
| 1955 | Pterygotus (Acutiramus) Størmer p. 31 |
| 2002 | Acutiramus Sepkoski |
| 2002 | Bunodella Sepkoski |
| 2013 | Acutiramus Dunlop et al. |
| 2020 | Acutiramus Dunlop et al. p. 26 |
| 2025 | Acutiramus Lamsdell |
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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. †Acutiramus Ruedemann 1935
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†Acutiramus bohemicus Barrande 1872
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Invalid names: Pterygotus blahai Semper 1898 [synonym], Pterygotus comes Barrande 1872 [synonym], Pterygotus mediocris Barrande 1872 [synonym]
†Acutiramus cummingsi Grote and Pitt 1875
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Invalid names: Pterygotus acuticaudatus Pohlman 1882 [synonym], Pterygotus buffaloensis Pohlman 1881 [synonym], Pterygotus quadraticaudatus Pohlman 1882 [synonym]
†Acutiramus floweri Kjellesvig-Waering and Caster 1955
†Acutiramus macrophthalmus Hall 1859
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Invalid names: Pterygotus juvenis Clarke and Ruedemann 1912 [synonym], Pterygotus osborni Hall 1859 [synonym]
†Acutiramus nobilis Kjellesvig-Waering 1964
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Invalid names: Pterygotus nobilis Barrande 1872 [replaced]
†Acutiramus perneri Chlupac 1994
†Acutiramus perryensis Leutze 1958
†Acutiramus suwanneensis Kjellesvig-Waering 1955
Invalid names: Bunodella Matthew 1889 [synonym]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: o = order | |||||
| Reference: Aberhan et al. 2004 | |||||
Age range: base of the Ludfordian to the top of the Pragian or 425.00000 to 410.62000 Ma
Collections (24 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Ludfordian | USA (New York) | Pterygotus floweri (26085) | |
| Pridoli | USA (New York) | A. macrophthalmus (26087 26089 26868) Pterygotus macrophthalmus, Pterygotus cummingsi, Pterygotus juvenis (491) | |
| Pridoli | USA (Florida) | A. suwanneensis (26877) | |
| Pridoli | Czechia | A. bohemicus, A. nobilis (14131 232620) Pterygotus bohemicus (14039 14040 14043 14080) Pterygotus bohemicus, A. nobilis (13894) | |
| Pridoli | Canada (New Brunswick) | A. sp. (161318) Bunodella horrida (161317) | |
| Lochkovian | Spain (Barcelona) | A. sp., A. perneri (231817) | |
| Lochkovian | Czechia (Prague) | A. sp. (12068) | |
| Lochkovian | USA (New York) | A. sp. (26871) | |
| Lochkovian | Czechia | A. bohemicus (14121) A. perneri (231818) A. perneri, Pterygotus blahai, Erettopterus sp. (13895) | |
| Lochkovian - Middle Devonian | Czechia | A. sp. (10314) | |
| Pragian | Australia (Victoria) | A. bohemicus (225146) | |
| Pragian | Algeria | Pterygotus bohemicus (27185) |