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Macrocheira sullivani
Taxonomy
Macrocheira sullivani was named by Nyborg et al. (2016). Its type specimen is CMNH F-64319 and is a 3D body fossil. Its type locality is Mist, near, which is in a Priabonian/Rupelian basinal (siliciclastic) horizon in the Keasey Formation of Washington.
Synonymy list
| Year | Name and author |
|---|---|
| 2016 | Macrocheira sullivani Nyborg et al. p. 127 figs. Figure 4 |
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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 sullivani 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 ornamented with four tubercles; hepatic region inflated; long, acute spine positioned on the lateral margin; protogastric region bulbous, consisting of several rounded and oval tubercles separated by shallow grooves; mesogastric region flask-shaped, several rounded and oval tubercles separated by shallow grooves; metagastric region broadly U-shaped, separated by a very deep groove anteriorly and a narrow groove posteriorly; laterally inflated, large tubercle axially; cardiac region diamond-shaped, three large tubercles axially; Urogastric region with two large tubercles axially; intestinal region flat, broadly trapezoidal in outline; epibranchial region oblong; mesobranchial region large, rounded, separated from metabranchial region by shallow groove; metabranchial region inflated, one large rounded tubercle paralleling posterior margin. |
Measurements
No measurements are available
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| Source: o = order, c = class | |||||
| References: Turnsek 1997, Aberhan 1992 | |||||
Age range: Priabonian or 37.71000 to 33.90000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Priabonian | USA (Oregon) | Macrocheira sullivani (75900) | |
| Priabonian - Rupelian | USA (Washington) | Macrocheira sullivani (type locality: 200793) |