PBDB Taxon

Basic info	Taxonomic history	Classification	Included Taxa
Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Pseudodesmatochoerus hoffmani

Mammalia - Merycoidodontidae

Taxonomy

Pseudodesmatochoerus hoffmani was named by Schultz and Falkenbach (1954) [genotype]. Its type specimen is F:AM 44912, a partial skeleton (Partial skull with I1-M3, partial mandible with i1-m3, and femur), and it is a 3D body fossil. Its type locality is Big Muddy Creek, which is in an Arikareean terrestrial horizon in Wyoming. It is the type species of Pseudodesmatochoerus.

It was synonymized subjectively with Eporeodon latidens by Lander (1998); it was synonymized subjectively with Mesoreodon chelonyx by Tabrum and Nichols (2001).

Synonymy list

Year	Name and author
1954	Pseudodesmatochoerus hoffmani Schultz and Falkenbach p. 206 figs. 12-15, 24
2023	Pseudodesmatochoerus hoffmani Stevens et al. pp. 53 - 55 figs. Figure 39D-F; Appendix 3C; Table A18

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Deuterostomia
phylum	Chordata	Haeckel 1874
subphylum	Vertebrata
superclass	Gnathostomata
—	Osteichthyes	()
subclass	Sarcopterygii	()
subclass	Dipnotetrapodomorpha	(Nelson 2006)
subclass	Tetrapodomorpha	()
—	Tetrapoda
—	Reptiliomorpha
—	Anthracosauria
subclass	Amphibiosauria	Kuhn 1967
—	Cotylosauria	()
—	Amniota
subclass	Synapsida
—	Therapsida	()
infraorder	Cynodontia	()

Rank	Name	Author
—	Mammaliamorpha
—	Mammaliaformes
class	Mammalia
—	Cladotheria
—	Zatheria
subclass	Tribosphenida	()
subclass	Theria
—	Eutheria	()
—	Placentalia
—	Boreoeutheria
—	Laurasiatheria
—	Scrotifera
—	Euungulata
—	Artiodactylamorpha
—	Artiodactyla	()
suborder	Tylopoda	()
family	Merycoidodontidae
subfamily	Promerycochoerinae
genus	Pseudodesmatochoerus
species	hoffmani

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.

†Pseudodesmatochoerus hoffmani Schultz and Falkenbach 1954

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Diagnosis

Reference	Diagnosis
C. B. Schultz and C. H. Falkenbach 1954	SKULL: Tendency to be slightly longer, but of approximately same width as examples of P. milleri; medial depression on sagittal crest more pronounced and nasals with greater anterior retraction than in examples of P. milleri; anterior nasal-maxiIIa contact above posterior portion of P 1 ; infraorbital foramen above posterior portion of P8 to an- terior portion pf P4; buila larger and higher than in P. milleri (more like P. wascoensis in this respect) ; postglenoid process more robust than in P. milleri. MANDIBLE: Approximately equal in size and form to examples of P. milleri; postsymphysis below anterior portion of Pa; condyle more robust than in P. milleri. DENTITION: Series similar to examples of P. milleri, slightly longer and heavier than examples of P. wascoensis, definitely larger than those of P. longiceps. LIMBS:Longer than examples of P. longiceps.
M. S. Stevens et al. 2023	Differs from P. milleri in a “greater medialdepression of the sagittal crest, a larger bulla, and the moremassive postglenoid process. The anterior nasal maxilla contact,which is located farther posteriorly than in P. milleri, mayindicate a tendency for retraction of the nasals” (Schultz andFalkenbach, 1954, p. 206).

Measurements

No measurements are available

Composition:

phosphaticsubp

Environment:

terrestrialo

Locomotion:

actively mobilec

Life habit:

ground dwellingf

Diet:

herbivoref

Reproduction:

viviparoussubc

Created:

2005-08-31 14:37:21

Modified:

2005-08-31 16:37:21

Source: f = family, o = order, subc = subclass, c = class, subp = subphylum

References: Carroll 1988, Hendy et al. 2009, Lander 1998, Nowak 1999, Lillegraven 1979

Age range: Arikareean or 29.50000 to 18.50000 Ma

Collections: one only

Time interval	Ma	Country or state	Original ID and collection number
Arikareean	29.5 - 18.5	USA (Wyoming)	Pseudodesmatochoerus hoffmani (type locality: 17472)