Basic info | Taxonomic history | Classification | Included Taxa |
Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Phenacocoelus kayi
Taxonomy
Phenacocoelus kayi was named by Schultz and Falkenbach (1950). Its type specimen is F:AM 33660A, a partial skull (Skull with I1-M3 and partial mandible with i1-i3 alv. and /c-m3), and it is a 3D body fossil. Its type locality is Southeast of Lusk, which is in a Harrisonian terrestrial horizon in the Marsland Formation of Wyoming.
It was synonymized subjectively with Merycoides harrisonensis by Lander (1998).
It was synonymized subjectively with Merycoides harrisonensis by Lander (1998).
Synonyms
|
Synonymy list
Year | Name and author |
---|---|
1950 | Phenacocoelus kayi Schultz and Falkenbach p. 106 figs. 1-3,11,13-15 |
1950 | Hypsiops luskensis Schultz and Falkenbach p. 122 figs. 4-6, 11, 13-15 |
1980 | Phenacocoelus luskensis MacFadden p. 93 |
2023 | Phenacocoelus kayi Stevens et al. pp. 99 - 202 figs. Figure 81; Appendix 10C; Table A35 |
Is something missing? Join the Paleobiology Database and enter the data
|
|
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.
†Phenacocoelus kayi Schultz and Falkenbach 1950
show all | hide all
Invalid names: Hypsiops luskensis Schultz and Falkenbach 1950 [synonym]
Diagnosis
Reference | Diagnosis | |
---|---|---|
C. B. Schultz and C. H. Falkenbach 1950 (Hypsiops luskensis) | SKULL: Approximately same length but narrower than H. breviceps, smaller than other species of genus; nasals retracted to area above P 1 ; anterior nasal-maxilla contact above anterior portion of P2 ; zygomatic arch elongated posteriorly and not extending upward as high as in other species of this genus, but similar to those of Phenacocoelus kayi and P. stouti (see discussion, p. 104); infraorbital foramen above anterior portion of P4; small, round, facial vacuity; other characters similar to those of H. brachymelis and H. brachymelis petersoni.
MANDIBLE: Characters and outline typical of genus; postsymphysis below Pa. DENTITION:Shorter and lighter than in H. breviceps; smaller than examples of other known species of genus; p1-p 3 each with anterior intermediate crest; PrPa each with posterior intermediate crest. LIMBS:Similar to those of H. brachymelis; considerable individual variation in length but within the expected variation of a species. | |
C. B. Schultz and C. H. Falkenbach 1950 | SKULL:Intermediate in size between P. typus and P. stouti; frontals slightly rounded laterally; nasals retracted anteriorly to a point above posterior portion of P1, with greater retraction than in examples of P. typus; anterior nasal-maxilla contact above the posterior portion of P2; supraorbital foramen at posterior end of a deep, narrow, elongated, slot-like depression (not an oblong vacuity as in P. typus or a round foramen as in P. stouti'), with suggestion of a groove extending forward and downward from it to
facial vacuity; zygomatic arch with a gradual rise posteriorly, extending to a point above posterior border of postglenoid process; in- fraorbital foramen above posterior portion of P 8 ; facial vacuity 2 ; bulla with inferior surface more depressed towards basioccipital than in P. typus; postglenoid process moderately heavy with sloping external border. MANDIBLE:Intermediate in size between examples of P. typus and P. stouti; approximately equal in size to examples of Hypsiops luskensis. DENTITION: Superior and inferior series intermediate in over-all length between P. typus and P. stouti, approximately equal in size to examples of H. luskensis; C/ and P1 large; axis of PLP 3 parallel to alveolar border; P2 and Pa set at slight angle to alveolar border; P2 with weak posterior intermediate crest; Paand P, each with moderately prominent posterior intermediate crest. LIMBS:Decidely longer than examples of P. typus; lighter, but approximately same length as examples of P. stouti. | |
M. S. Stevens et al. 2023 | Larger species of Phenacoelus (M1-3 length = 49-51 mm) (Fig. 82). |
Measurements
No measurements are available
|
|
||||
|
|
||||
|
|
||||
|
|
||||
Source: f = family, o = order, subc = subclass, c = class, subp = subphylum | |||||
References: Lander 1998, Nowak 1999, Lillegraven 1979, Carroll 1988, Hendy et al. 2009 |
Age range: Harrisonian or 24.80000 to 18.50000 Ma
Collections (3 total)
Time interval | Ma | Country or state | Original ID and collection number |
---|---|---|---|
Harrisonian | USA (Wyoming) | Hypsiops luskensis (17780) Phenacocoelus kayi (type locality: 17840) | |
Harrisonian | USA (Florida) | Phenacocoelus luskensis (18558) |