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Macrocheira columbiaensis
Taxonomy
Macrocheira columbiaensis was named by Nyborg et al. (2016). Its type specimen is UWBM 97194 and is a 3D body fossil. Its type locality is Pigeon Bluff, which is in a Burdigalian marine siltstone in the Astoria Formation of Washington.
Synonymy list
| Year | Name and author |
|---|---|
| 2016 | Macrocheira columbiaensis Nyborg et al. p. 131 figs. Figure 5 |
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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.
†Macrocheira columbiaensis Nyborg et al. 2016
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| T. Nyborg et al. 2016 | Carapace pyriform, widest at midwidth of branchial region; carapace regions well-defined, ornamented with numerous tubercles and bulbous regions; rostrum bifid, tubular, diverging weakly from carapace midline; ocular eave large, orbit poorly developed, separated by preorbital, intercalated, and postorbital spines; frontal region weakly triangular, two large tubercles, transversely placed; hepatic region highly inflated, one large centered tubercle, small, sharp spine, situated on the lateral margin; protogastric region rounded, two large tubercles axially centered; mesogastric region flask-shaped, two large, axially centered, rounded tubercles; metagastric region inflated, broadly U-shaped; intestinal region ornamented with two acute tubercles proximal to the posterior margin; epibranchial region oblong, distally subdivided by two deep depressions, two large, acute tubercles, axially centered; mesobranchial region large, rounded; metabranchial region weakly depressed, triangular. |
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| References: Aberhan 1992, Turnsek 1997 | |||||
Age range: Burdigalian or 20.44000 to 15.97000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Burdigalian | USA (Washington) | Macrocheira columbiaensis (type locality: 200869) |