Project 574: T. Konishi, M. W. Caldwell. 2011. Two New Plioplatecarpine (Squamata, Mosasauridae) Genera from the Upper Cretaceous of North America, and a Global Phylogenetic Analysis of Plioplatecarpines. Journal of Vertebrate Paleontology. 31 (4):754-783.
Abstract
A new plioplatecarpine taxon, Latoplatecarpus, gen. nov., is proposed here to incorporate two species, L. willistoni, sp. nov., and L. nichollsae (comb. nov.). The new genus is currently restricted in distribution to the lower middle Campanian of North America. Phylogenetic analysis incorporating 97 morphological characters and 17 ingroup taxa indicates that (1) Ectenosaurus clidastoides is the basal-most member within the Plioplatecarpinae; (2) Platecarpus planifrons is generically distinct from P. tympaniticus; (3) Latoplatecarpus willistoni, gen. et sp. nov., constitutes the basal-most member within the clade that is sister to Platecarpus tympaniticus; and (4) as many as 17 unequivocal character changes support the clade comprising the three post-middle Campanian Plioplatecarpus species. Plesioplatecarpus, gen. nov., is erected to establish Plesioplatecarpus planifrons (comb. nov.). Further, we propose that the North American specimens referred to Platecarpus somenensis pertain to Latoplatecarpus nichollsae, based on the available phylogenetic, ontogenetic, biostratigraphic, and paleobiogeographic data and interpretations. Consequently, the current study recognizes 11 species within seven genera to constitute the Plioplatecarpinae. Of anatomical note, we suggest that quadrates in most plioplatecarpine taxa including Latoplatecarpus were tilted anteriorly in life, as a result of the suspensorial articulation forming along the distomedial portion of the long suprastapedial process that typifies quadrates in plioplatecarpine mosasaurs.Read the article »
Project DOI: 10.7934/P574, http://dx.doi.org/10.7934/P574
This project contains | Matrices |
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Download Project SDD File ![]() | Total scored cells: 1361 Total media associated with cells: 0 Total labels associated with cell media: 0 |
Characters | |
Total characters: 97 Total characters with associated media: 0 Total characters with media with labels: 0 Total character states: 280 Total character states with associated media: 0 Total character states with media with labels:0 Total unordered/ordered characters:97/0 |
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MorphoBank Project 574
MorphoBank Project 574
- Creation Date:
16 August 2011 - Publication Date:
28 October 2011 - Project views: 49439
- Media downloads: 12
- Matrix downloads: 23
Authors' Institutions
- Royal Tyrrell Museum of Palaeontology, Drumheller
- University of Alberta
Members
member name | taxa ![]() |
specimens ![]() |
media ![]() | chars ![]() | character
| cell scorings (scored, NPA, "-") | cell
| rules ![]() | ||||||
MorphoBank Curator Project Administrator | 0 | 0 | 0 | 0 | 0 | 0 | 0 (0, 0, 0) | 0 | 0 | 0 | ||||
Maureen Admin Full membership ![]() | 0 | 0 | 0 | 0 | 0 | 0 | 0 (0, 0, 0) | 0 | 0 | 0 | ||||
Takuya Konishi Full membership ![]() | 19 | 7 | 7 | 97 | 0 | 0 | 1361 (1358, 0, 3) | 0 | 0 | 0 |
Taxonomic Overview for Matrix 'M1295' (19 Taxa)
taxon | unscored cells |
scored cells ![]() |
no cell support ![]() |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
[1] Clidastes propython Last Modified in 12/05/13 | 27 | 73 | 70 | 0 | 0 | 0 | 0 | 3 ![]() |
[2] Kourisodon puntledgensis Last Modified in 12/05/13 | 25 | 70 | 70 | 0 | 2 | 0 | 0 | 3 ![]() |
[3] Yaguarasaurus columbianus Last Modified in 12/05/13 | 45 | 52 | 52 | 0 | 0 | 0 | 0 | 3 ![]() |
[4] Russellosaurus coheni Last Modified in 12/05/13 | 28 | 69 | 69 | 0 | 0 | 0 | 0 | 3 ![]() |
[5] Tethysaurus nopcsai Last Modified in 12/05/13 | 28 | 70 | 69 | 0 | 0 | 0 | 0 | 3 ![]() |
[6] Tylosaurus kansasensis Last Modified in 12/05/13 | 33 | 64 | 64 | 0 | 0 | 0 | 0 | 3 ![]() |
[7] Tylosaurus proriger Last Modified in 12/05/13 | 3 | 94 | 94 | 0 | 0 | 0 | 0 | 3 ![]() |
[8] Ectenosaurus clidastoides Last Modified in 12/05/13 | 23 | 74 | 73 | 0 | 1 | 0 | 0 | 3 ![]() |
[9] Angolasaurus bocagei Last Modified in 12/05/13 | 51 | 46 | 46 | 0 | 0 | 0 | 0 | 3 ![]() |
[10] Selmasaurus russelli Last Modified in 12/05/13 | 57 | 43 | 40 | 0 | 0 | 0 | 0 | 3 ![]() |
[11] Selmasaurus johnsoni Last Modified in 12/05/13 | 27 | 70 | 70 | 0 | 0 | 0 | 0 | 3 ![]() |
[12] Platecarpus planifrons Last Modified in 12/05/13 | 17 | 80 | 80 | 0 | 0 | 0 | 0 | 3 ![]() |
[13] Platecarpus tympaniticus Last Modified in 12/05/13 | 1 | 99 | 96 | 0 | 0 | 0 | 0 | 3 ![]() |
[14] Latoplatecarpus willistoni Last Modified in 12/05/13 | 18 | 81 | 79 | 0 | 0 | 0 | 0 | 3 ![]() |
[15] Plioplatecarpus nichollsae Last Modified in 12/05/13 | 21 | 76 | 76 | 0 | 0 | 0 | 0 | 3 ![]() |
[16] 'Platecarpus somenensis' Last Modified in 12/05/13 | 20 | 79 | 77 | 0 | 0 | 0 | 0 | 3 ![]() |
[17] Plioplatecarpus primaevus Last Modified in 12/05/13 | 10 | 89 | 87 | 0 | 0 | 0 | 0 | 3 ![]() |
[18] Plioplatecarpus houzeaui Last Modified in 12/05/13 | 29 | 70 | 68 | 0 | 0 | 0 | 0 | 3 ![]() |
[19] Plioplatecarpus marshi Last Modified in 12/05/13 | 39 | 59 | 58 | 0 | 0 | 0 | 0 | 3 ![]() |
Project views 
type | number of views | Individual items viewed (where applicable) |
Total project views | 49439 | |
Media views | 13354 | Media search (5794 views); M93451 (1030 views); M93453 (941 views); M93452 (1079 views); M93455 (1276 views); M93456 (1141 views); M93450 (991 views); M93454 (1102 views); |
Bibliography | 5326 | |
Project overview | 3532 | |
Documents list | 1826 | |
Matrix views | 2666 | Matrix landing page (2346 views); Phylogeny of Plioplatecarpinae (320 views); |
Specimen list | 7844 | |
Taxon list | 14891 |
Project downloads 
type | number of downloads | Individual items downloaded (where applicable) |
Total downloads from project | 423 | |
Media downloads | 12 | M93450 (2 downloads); M93453 (2 downloads); M93455 (2 downloads); M93456 (2 downloads); M93451 (2 downloads); M93454 (1 download); M93452 (1 download); |
Project downloads | 384 | |
Matrix downloads | 23 | Phylogeny of Plioplatecarpinae (23 downloads); |
Document downloads | 4 | Copyright information for exemplar media (4 downloads); |