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Megalocoelacanthus dobiei
Taxonomy
Megalocoelacanthus dobiei was named by Schwimmer et al. (1994). Its type specimen is CCK 88-2-1, a partial skeleton, and it is a 3D body fossil. Its type locality is Cowikee Creek, North Fork, which is in a Santonian/Campanian coastal horizon in the Blufftown Formation of Alabama. It is the type species of Megalocoelacanthus.
Synonymy list
| Year | Name and author |
|---|---|
| 1994 | Megalocoelacanthus dobiei Schwimmer et al. p. 503 figs. Fig. 2-3 |
| 1998 | Megalocoelacanthus dobiei Forey p. 355 |
| 2004 | Megalocoelacanthus dobiei Schultze p. 487 |
| 2012 | Megalocoelacanthus dobiei Dutel et al. p. 25 |
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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.
†Megalocoelacanthus dobiei Schwimmer et al. 1994
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| H. Dutel et al. 2012 | Parietonasal shield narrow, and longer than the posparietal shield. Supraorbital sensory line canal opening through a large groove crossed by slender pillars. Ventral descending processes present on the supratemporal and on the parietal. Basisphenoid very deep dorsoventrally. Palatoquadrate deeper than long, with distinct swelling extending from the ventral pterygoid margin immediately anterior to the quadrate. Mandibles relatively elongate posterior to the articular; articular sutured to the angular. Medial surfaces of the prearticular, palatoquadrate, and coronoid covered with tubercular shagreen. No marginal teeth on the mandible. Coronoid large, with subcircular ventral margin. Lateral surface of angular bears large pores of the sensory line canal and very faint longitudinal grooves on its posterior portion. Gular and operculum lack external ornamentation. Operculum subrhomboidal, with sharply angled anteroventral margin. Gular plates diverge strongly along posterior midline. |
Measurements
No measurements are available
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| Source: subp = subphylum, p = phylum | |||||
| References: Kiessling 2004, Carroll 1988 | |||||
Age range: base of the Santonian to the top of the Maastrichtian or 85.70000 to 66.00000 Ma
Collections (5 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Santonian | USA (Kansas) | Megalocoelacanthus dobiei (206749) | |
| Santonian | USA (Alabama) | Megalocoelacanthus dobiei (87057) | |
| Late/Upper Santonian - Middle Campanian | USA (Georgia) | Megalocoelacanthus dobiei (35289) | |
| Late/Upper Santonian - Middle Campanian | USA (Alabama) | Megalocoelacanthus dobiei (type locality: 87056) | |
| Maastrichtian | USA (New Jersey) | Megalocoelacanthus dobiei (57915) |