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Platecarpus tympaniticus
Taxonomy
Platecarpus tympaniticus was named by Cope (1869). Its type specimen is ANSP 8484, 8447, 8488, 8491, 8558, 8559, 8562, a partial skull, and it is a 3D body fossil. Its type locality is Columbus, which is in a Santonian/Campanian marine sandstone in the Eutaw Formation of Mississippi. It is the type species of Platecarpus.
Synonyms
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Synonymy list
Year | Name and author |
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1869 | Platecarpus tympaniticus Cope p. 265 |
1870 | Platecarpus tympaniticus Cope p. 200 |
1870 | Liodon ictericus Cope p. 577 |
1870 | Liodon mudgei Cope p. 581 |
1871 | Holcodus coryphaeus Cope p. 6 |
1871 | Holcodus ictericus Cope p. 9 |
1871 | Holcodus mudgei Cope p. 10 |
1872 | Platecarpus tympaniticus Cope |
1872 | Lestosaurus felix Marsh |
1872 | Lestosaurus gracilis Marsh |
1872 | Lestosaurus simus Marsh |
1872 | Lestosaurus latifrons Marsh p. 458 figs. Pl. XIII, fig. 3 |
1872 | Lestosaurus coryphaeus Marsh p. 461 |
1872 | Lestosaurus ictericus Marsh p. 461 |
1873 | Lestosaurus coryphaeus Leidy p. 276 |
1874 | Platecarpus coryphaeus Cope p. 35 |
1874 | Platecarpus felix Cope p. 35 |
1874 | Platecarpus ictericus Cope p. 35 |
1874 | Platecarpus gracilis Cope p. 36 |
1874 | Platecarpus latifrons Cope p. 36 |
1874 | Platecarpus mudgei Cope p. 36 |
1874 | Platecarpus simus Cope p. 36 |
1875 | Platecarpus coryphaeus Cope p. 142 |
1875 | Platecarpus ictericus Cope p. 144 |
1875 | Platecarpus mudgei Cope p. 157 |
1875 | Platecarpus felix Cope p. 267 |
1875 | Platecarpus gracilis Cope p. 268 |
1875 | Platecarpus latifrons Cope p. 268 |
1875 | Platecarpus simus Cope p. 268 |
1877 | Platecarpus coryphaeus Cope p. 584 |
1877 | Platecarpus ictericus Cope p. 584 |
1880 | Holosaurus abruptus Marsh p. 87 |
1894 | Platecarpus coryphaeus Merriam p. 29 |
1894 | Platecarpus ictericus Merriam p. 30 |
1894 | Platecarpus simus Merriam p. 30 |
1897 | Holosaurus abruptus Marsh p. 527 |
1897 | Lestosaurus simus Marsh p. 527 |
1902 | Lestosaurus coryphaeus Hay p. 469 |
1902 | Lestosaurus simus Hay p. 469 |
1902 | Platecarpus tympaniticus Hay p. 469 |
1902 | Lestosaurus felix Hay p. 470 |
1902 | Lestosaurus gracilis Hay p. 470 |
1902 | Lestosaurus ictericus Hay p. 470 |
1902 | Lestosaurus latifrons Hay p. 470 |
1902 | Lestosaurus mudgei Hay p. 470 |
1902 | Holosaurus abruptus Hay p. 471 |
1928 | Platecarpus simus Perrier p. 3091 |
1930 | Platecarpus coryphaeus Hay p. 260 |
1930 | Platecarpus felix Hay p. 260 |
1930 | Platecarpus gracilis Hay p. 260 |
1930 | Platecarpus ictericus Hay p. 260 |
1930 | Platecarpus latifrons Hay p. 260 |
1930 | Platecarpus mudgei Hay p. 260 |
1930 | Platecarpus simus Hay p. 260 |
1930 | Holosaurus abruptus Hay p. 261 |
1930 | Platecarpus tympaniticus Hay p. 261 |
1934 | Platecarpus coryphaeus Swinton p. 19 |
1967 | Platecarpus tympaniticus Russell p. 152 |
1967 | Platecarpus coryphaeus Russell p. 153 |
1967 | Platecarpus ictericus Russell p. 154 |
1969 | Platecarpus coryphaeus Thurmond p. 72 |
1981 | Platecarpus coryphaeus Thurmond and Jones p. 159 |
1981 | Platecarpus ictericus Thurmond and Jones p. 159 |
1981 | Platecarpus tympaniticus Thurmond and Jones p. 159 |
2007 | Platecarpus ictericus Konishi and Caldwell |
2007 | Platecarpus tympaniticus Konishi and Caldwell |
2010 | Platecarpus tympaniticus Konishi et al. |
2010 | Platecarpus tympaniticus Lindgren et al. |
2012 | Platecarpus tympaniticus Konishi et al. |
2014 | Platecarpus tympaniticus Fanti et al. |
2019 | Platecarpus tympaniticus Driscoll et al. |
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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.
†Platecarpus tympaniticus Cope 1869
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Invalid names: Holcodus coryphaeus Cope 1871 [synonym], Lestosaurus felix Marsh 1872 [synonym], Lestosaurus gracilis Marsh 1872 [synonym], Lestosaurus latifrons Marsh 1872 [synonym], Lestosaurus simus Marsh 1872 [synonym], Liodon ictericus Cope 1870 [synonym], Liodon mudgei Cope 1870 [synonym]
Diagnosis
Reference | Diagnosis | |
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T. Konishi and M. W. Caldwell 2007 | Small predental rostrum of premaxilla may or may not be present; up to 12 maxillary teeth; posterior termination of maxillary-premaxillary suture between second and third maxillary tooth; prefrontal forms posterior one third of lateral border of external naris; incipient supraorbital process on prefrontal; lateral margin of frontal gently curved in preorbital region; lateral borders of frontal converge anterior to orbits; frontal forms median notch to receive anterior portion of parietal table; lateral margins of parietal table form narrow parietal crest anterior to divergence of suspensorial rami; 10 or more pterygoid teeth; ectopterygoid process projects anterolaterally from dentigerous body of pterygoid; posteroventral process of jugal present; suprastapedial process of quadrate elongate (more than two-thirds total quadrate height); supra- and infrastapedial processes unfused; large, vertically elongate stapedial pit; elongate, parallel-sided stapedial notch; mandibular condyle gently convex, transversally wide; small ventral opening for basilar artery between basioccipital and basisphenoid; 11 to 12 teeth in dentary; retroarticular process rounded with large foramina on ventral surface; marginal teeth recurved, and possess anterior and posterior carinae, lingual striations and labial facets; 29 presacral vertebrae, 5 pygals, 91 to 96 caudals; 3 ossified tarsals. | |
T. Konishi et al. 2010 | No predental rostrum on premaxilla; first pair of premaxillary teeth procumbent; prefrontal posteriorly contacting postorbitofrontal above orbit; frontal supraorbital border thin to slightly thickened lateral to prefrontal-postorbitofrontal contact; frontal median dorsal keel present; pair of broadly shallow parasagittal excavations extending in parallel with this keel on dorsal side; supraorbital bulge distinct; parietal foramen anterior border occurring within one foramen length from fronto-parietal suture; parietal table triangular, wider than long; parietal table lateral borders posteriorly converging with weak convexity; parietal crest typically obtuse angled; quadrate cephalic condyle anterior border straight; same condyle with round, obtuse anteromedial corner; stapedial pit oval with straight lateral borders; medial vertical ridge broadly rounded; quadrate shaft with or without slight posteroventral eminence with straight posterior border; mandibular condyle transversely wide, teardrop-shaped in outline with its apex pointing anteromedially; suprastapedial process distally terminating in rounded expansion; basal tubera moderately well developed but widely separated from each other; coronoid process moderately developed; coronoid posterior border posteriorly descending at about 45 degrees from horizontal; retroarticular process rounded; eighth intercentrum (hypapophyseal peduncle) absent on seventh cervical centrum; zygapophyses functional throughout pre-pygal series; 20 to 23? dorsal vertebrae; five to six pygal vertebrae; approximately 85 post-pygal caudal vertebrae (FHSM VP-322; LACM 128319; Williston, 1910); scapula and coracoid sub-equal in size; pectoral crest distinct but narrow; radius hatchet-shaped to nearly semi-circular; carpals typically four; tarsals three; paddle broad, base of fifth digit divaricate from the others at 60 degrees or greater angle. |
Measurements
No measurements are available
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Source: f = family, c = class, subp = subphylum, uc = unranked clade | |||||
References: Hendy et al. 2009, Gervais 1852, Carroll 1988 |
Age range: base of the Late/Upper Coniacian to the top of the Late/Upper Maastrichtian or 89.30000 to 66.00000 Ma
Collections (15 total)
Time interval | Ma | Country or state | Original ID and collection number |
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Cretaceous | USA (Kansas) | Liodon ictericus (199538) | |
Turonian - Santonian | USA (Kansas) | Platecarpus abruptus (107339) Platecarpus ictericus (38720) | |
Coniacian - Santonian | USA (Kansas) | Liodon mudgei (199541) | |
Early/Lower Coniacian | USA (Texas) | Platecarpus coryphaeus (106188) | |
Late/Upper Coniacian | USA (Kansas) | Platecarpus coryphaeus, Platecarpus ictericus (118152) | |
Late/Upper Coniacian - Early/Lower Santonian | USA (Kansas) | Platecarpus ictericus (215772) | |
Late/Upper Santonian | USA (Kansas) | Platecarpus tympaniticus (118338) | |
Late/Upper Santonian - Early/Lower Campanian | USA (Mississippi) | Platecarpus tympaniticus (type locality: 98972) | |
Campanian | USA (Wyoming) | Platecarpus ictericus (107672 107675) | |
Campanian | USA (South Dakota) | Platecarpus ictericus (107674 109761) | |
Early/Lower Campanian | Canada (Northwest Territories) | Platecarpus ictericus (106328) | |
Late/Upper Maastrichtian | Spain (Burgos) | Platecarpus ictericus (176782) |