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Macroacaena alseanus
Taxonomy
Lyreidus alseanus was named by Rathbun (1932). Its type specimen is USNM 371901, a carapace, and it is a 3D body fossil. Its type locality is South side of Alsea Bay, which is in a Rupelian marine sandstone in the Alsea Formation of Oregon.
It was recombined as Lyreidus (Lysirude) alseanus by Feldmann (1992); it was recombined as Macroacaena alseanus by Tucker (1998), Schweitzer et al. (2000); it was recombined as Macroacaena alseana by Schweitzer et al. (2003), Schweitzer et al. (2010), Karasawa et al. (2014).
It was recombined as Lyreidus (Lysirude) alseanus by Feldmann (1992); it was recombined as Macroacaena alseanus by Tucker (1998), Schweitzer et al. (2000); it was recombined as Macroacaena alseana by Schweitzer et al. (2003), Schweitzer et al. (2010), Karasawa et al. (2014).
Synonymy list
| Year | Name and author |
|---|---|
| 1932 | Lyreidus alseanus Rathbun p. 239 fig. 3,4 |
| 1989 | Lyreidus alseanus Feldmann p. 63 |
| 1992 | Lyreidus (Lysirude) alseanus Feldmann p. 951 |
| 1998 | Macroacaena alseanus Tucker p. 327 |
| 2000 | Macroacaena alseanus Schweitzer et al. p. 28 |
| 2003 | Macroacaena alseana Schweitzer et al. p. 28 |
| 2010 | Macroacaena alseana Schweitzer et al. p. 71 |
| 2014 | Macroacaena alseana Karasawa et al. p. 246 |
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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.
†Macroacaena alseanus Rathbun 1932
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. M. Feldmann 1989 | Raninid with tridentate frontoorbital margin; fusiform carapace outline; hypertrophied, straight, slender, lateral spines; and sinuous anterolateral margin with small spine. |
Measurements
No measurements are available
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| Source: o = order, c = class, uc = unranked clade | |||||
| References: Aberhan 1992, Turnsek 1997, Fearon and Clapham 2023 | |||||
Collections (15 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Middle Eocene | USA (Washington) | Macroacaena alseanus (202157) | |
| Bartonian | USA (Oregon) | Lyreidus alseanus (202156 226550 226551 226552 226553 226554) | |
| Late/Upper Eocene | USA (Washington) | Lyreidus alseanus (202153) | |
| Priabonian | USA (Washington) | Lyreidus alseanus (202152 202155 202365 226548 226549) | |
| Rupelian | USA (Washington) | Lyreidus alseanus (202154) | |
| Rupelian | USA (Oregon) | Lyreidus alseanus (type locality: 135996) |