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Reptilia - Squamata - Mosasauridae

Synonymy list
YearName and author
1851Holcodus Gibbes p. 9
1851Holcodus acutidens Gibbes p. 9
1869Platecarpus Cope p. 260
1870Platecarpus Cope p. 199
1871Platecarpus latispinus Cope
1872Lestosaurus Marsh
1873Platecarpus affinis Leidy
1873Lestosaurus Leidy p. 344
1874Platecarpus anguliferus Cope
1874Sironectes Cope p. 34
1875Mosasaurus acutidens Cope p. 270
1880Holosaurus Marsh p. 87
1902Sironectes Hay p. 468
1902Holcodus Hay p. 469
1902Holcodus acutidens Hay p. 469
1902Lestosaurus Hay p. 469
1902Platecarpus Hay p. 469
1902Holosaurus Hay p. 471
1915Platecarpus brachycephalus Loomis pp. 556-557
1954Holcodus McDowell and Bogert p. 132
1954Holosaurus McDowell and Bogert p. 132
1954Platecarpus McDowell and Bogert p. 132
1954Sironectes McDowell and Bogert p. 132
1967Platecarpus Russell p. 148
1969Platecarpus Thurmond p. 72
1970Platecarpus Russell p. 373
1981Platecarpus Thurmond and Jones p. 158
1988Platecarpus Carroll
2002Platecarpus Novas et al.
2002Holcodus Sepkoski, Jr.
2002Platecarpus Sepkoski, Jr.
2005Platecarpus Bardet et al.
2005Platecarpus Bell and Polcyn p. 189
2010Platecarpus Konishi et al.
2012Platecarpus Konishi et al.

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phylumChordataHaeckel 1847
subclassDipnotetrapodomorpha(Nelson 2006)
SauriaGauthier 1984
Lepidosauromorpha(Benton 1983)
ToxicoferaVidal and Hedges 2005
Russellosaurina(Bell 1997)
subfamilyPlioplatecarpinae(Dollo 1884)

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.

E. D. Cope 1869"Dorsal vertebrae more or less depressed; the articular faces transversely ovate;" "the pterygoid teeth pleurodont."
T. Konishi et al. 2010Size moderate, mandible seldom reaching 0.7 m in length; small, acute predental rostrum on premaxilla may be present; premaxillo-maxillary suture posteriorly ascending in straight line; posterior termination of the suture between second and third maxillary tooth; 12 maxillary teeth; prefrontal forming 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 converging anterior to orbits; ventrolateral processes of frontal running parallel with each other; frontal forming median notch to receive anterior portion of parietal table; parietal foramen ovoid; lateral margins of parietal table forming parietal crest anterior to divergence of suspensorial rami; parietal postorbital process short, not reaching anterolateral corner of upper temporal fenestra; same process not forming dorsal plateau posteriorly adjacent to frontal ala; 10 or more pterygoid teeth; ectopterygoid process projecting anterolaterally from dentigerous body of pterygoid; posteroventral jugal process acutely pointing posteriorly; suprastapedial process of quadrate elongate, more than two-thirds total quadrate height; supra- and infrastapedial process unfused; quadrate ala projecting laterally nearly perpendicular to long axis of suprastapedial process in dorsal aspect; quadrate alar surface relatively planar; large, vertically elongate stapedial pit; elongate, parallel-sided stapedial notch; mandibular condyle gently convex, transversely wide; predental projection on dentary absent; 12 teeth in dentary; no extensive edentulous portion posterior to last dentary tooth on dentary; surangular constantly diverging anteriorly, dorsal and ventral borders straight; articular portion of glenoid fossa larger than surangular portion; retroarticular process short, bearing large foramina on ventral surface; marginal teeth posteromedially recurved, possessing anterior and posterior carinae, and lingual striations and labial facets; basal cross-section of these teeth subcircular; cervical intervertebral joint strongly curved; zygosphenes and zygantra rudimentary; scapular blade anteroventral border forming obtuse angle with long axis of scapular neck; more than half the length of scapular blade posteroventral border anteriorly embayed; coracoid fan-shaped, may be notched; humerus length only slightly exceeding distal width; four or five carpals; phalanges elongate.
No measurements are available
Composition: phosphaticsubp
Environment: terrestrialsubc
Locomotion: actively mobilec
Life habit: aquaticf
Diet: carnivoref
Vision: well-developedf
Reproduction: ovoviviparousf
Created: 2018-01-05 16:32:54
Modified: 2018-01-05 16:32:54
Source: f = family, subc = subclass, c = class, subp = subphylum
References: Gervais 1852, Carroll 1988, Hendy et al. 2009

Age range: base of the Late/Upper Turonian to the top of the Early/Lower Maastrichtian or 93.50000 to 66.00000 Ma

Collections (56 total)

Time interval Ma Country or state Original ID and collection number
Cretaceous145.0 - 66.0USA (Kansas) Liodon ictericus (199538) Liodon mudgei (199541)
Late/Upper Cretaceous100.5 - 66.0USA (Texas) P. sp. (106192)
Late/Upper Cretaceous100.5 - 66.0Egypt Platecarpus indet. (140710)
Turonian - Santonian93.9 - 83.6USA (Kansas) P. abruptus (107339) P. ictericus (38720) P. sp. (38721)
Late/Upper Turonian93.5 - 89.3Brazil P. sp. (142100)
Early/Lower Coniacian89.3 - 85.8Brazil P. sp. (126912)
Early/Lower Coniacian89.3 - 85.8USA (Texas) P. coryphaeus (106188)
Late/Upper Coniacian89.3 - 85.8USA (Kansas) P. coryphaeus, P. ictericus (118152)
Late/Upper Coniacian89.3 - 85.8USA (Texas) P. planifrons (151422)
Late/Upper Coniacian - Early/Lower Santonian89.3 - 83.5USA (Kansas) Clidastes planifrons (123571) P. planifrons (123572 123574)
Santonian86.3 - 83.6Australia (Western Australia) P. sp. (142716)
Santonian86.3 - 83.6USA (Kansas) P. planifrons (99385)
Santonian - Maastrichtian86.3 - 66.0USA (Alabama) P. sp. (81972 107503)
Early/Lower Santonian85.8 - 83.5USA (Arkansas) P. sp. (107639)
Middle Santonian85.8 - 83.5USA (New Mexico) P. sp. (52037)
Late/Upper Santonian - Early/Lower Campanian85.8 - 70.6USA (Kansas) P. tympaniticus (118338)
Late/Upper Santonian - Early/Lower Campanian85.8 - 70.6USA (Mississippi) P. tympaniticus (98972)
Campanian83.6 - 72.1Canada (Manitoba) P. sp. (36746 36749)
Campanian83.6 - 72.1USA (North Carolina) P. sp. (106277)
Campanian83.6 - 72.1Sweden P. sp. (102883)
Campanian83.6 - 72.1USA (Wyoming) P. brachycephalus (105717) P. ictericus (107672 107675) P. sp. (107641)
Campanian83.6 - 72.1USA (South Dakota) P. ictericus (107674 109761) P. sp. (107642 107678 107679)
Campanian83.6 - 72.1USA (North Dakota) P. sp. (107427)
Campanian83.6 - 72.1USA (Georgia) P. sp. (35289)
Campanian83.6 - 72.1USA (Kansas) P. sp. (107677)
Campanian - Maastrichtian83.6 - 66.0USA (South Dakota) P. sp. (99710)
Early/Lower Campanian83.5 - 70.6Canada (Northwest Territories) P. ictericus (106328)
Early/Lower Campanian83.5 - 70.6USA (North Carolina) P. sp. (57918)
Early/Lower Campanian83.5 - 70.6Sweden (Skåne) P. sp. (74334)
Early/Lower Campanian - Middle Campanian83.5 - 70.6USA (South Dakota) P. sp. (107676)
Late/Upper Campanian83.5 - 70.6Germany (Niedersachsen) P. sp. (31993)
Late/Upper Campanian83.5 - 70.6Russian Federation (Volgograd) P. sp. (59385)
Late/Upper Campanian - Early/Lower Maastrichtian83.5 - 66.0Syria P. ptychodon (117850 117852 117857 117863)
Maastrichtian72.1 - 66.0Jordan P. ptychodon (13366)
Maastrichtian72.1 - 66.0Angola (Namibe) P. ptychodon (106705)
Maastrichtian72.1 - 66.0Niger (Tahoua) P. sp. (104945)
Maastrichtian72.1 - 66.0Spain (Alava) P. ictericus (141928)
Late/Upper Maastrichtian70.6 - 66.0Morocco P. ptychodon (123268)
Late/Upper Maastrichtian70.6 - 66.0Jordan P. sp. (170239)