PBDB Taxon

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Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Dissacus

Mammalia - Acreodi - Mesonychidae

Taxonomy

Dissacus was named by Cope (1881) [sometimes said to be 1884, but 1881 is supported by Matthew 1915a, Matthew 1937, Simpson 1937a and Winterfeld 1982; and apparently the name was used in combination "Dissacus carnifex" in 1882, before transferral of genotypic species navajovius to the genus in 1884!]. It is not extant. Its type is Mesonyx navajovius. It was considered paraphyletic by Geisler and McKenna (2007).

It was assigned to Mesonychinae by Szalay and Gould (1966), Zhou et al. (1995); and to Mesonychidae by Cope (1881), Scott (1892), Hay (1902), Hay (1930), Chow et al. (1973), Chow et al. (1977), Carroll (1988), McKenna and Bell (1997), Gingerich (1998), Archibald (1998), Thewissen et al. (2001), Geisler and McKenna (2007), Rose et al. (2012), Solé et al. (2018).

Synonyms

Hyoenodictis was named by Lemoine (1880).

It was synonymized subjectively with Dissacus by McKenna and Bell (1997).
Hyaenodictis was named by Lemoine (1891).

It was synonymized subjectively with Dissacus by McKenna and Bell (1997).
Plesidissacus was named by Lemoine (1894).

It was synonymized subjectively with Dissacus by McKenna and Bell (1997).

Synonymy list

Year	Name and author
1880	Hyoenodictis Lemoine p. 5
1881	Dissacus Cope
1891	Hyaenodictis Lemoine p. 272
1892	Dissacus Scott p. 303
1894	Plesidissacus Lemoine p. 353
1902	Dissacus Hay p. 749
1930	Dissacus Hay p. 467
1966	Dissacus Szalay and Gould p. 134
1973	Dissacus Chow et al.
1977	Dissacus Chow et al.
1988	Dissacus Carroll
1995	Dissacus Zhou et al. p. 397
1997	Dissacus McKenna and Bell p. 367
1998	Dissacus Archibald p. 317
1998	Dissacus Gingerich p. 427 figs. FIgure 1
2001	Dissacus Thewissen et al. p. suppl.
2007	Dissacus Geisler and McKenna p. 190
2012	Dissacus Rose et al.
2018	Dissacus Solé et al.

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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

Rank	Name	Author
—	Therapsida	()
infraorder	Cynodontia	()
—	Mammaliamorpha
—	Mammaliaformes
class	Mammalia
—	Cladotheria
—	Zatheria
subclass	Tribosphenida	()
subclass	Theria
—	Eutheria	()
—	Placentalia
—	Boreoeutheria
—	Laurasiatheria
—	Scrotifera
order	Acreodi	Matthew 1909
—	Mesonychia
family	Mesonychidae
genus	Dissacus	Cope 1881

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.

G. †Dissacus Cope 1881

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†Dissacus argenteus O'Leary and Rose 1995

†Dissacus blayaci Stehlin 1926

†Dissacus bohaiensis Tong and Wang 2006

†Dissacus europaeus Lemoine 1891

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Invalid names: Hyaenodictis gaudryi Lemione 1891 [synonym]

†Dissacus filholi Lemoine 1891

†Dissacus indigenus Dashzeveg 1976

†Dissacus magushanensis Yan and Tang 1976

†Dissacus navajovius Cope 1881

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Invalid names: Dissacus carnifex Cope 1882 [synonym]

†Dissacus praenuntius Matthew and Granger 1915

†Dissacus progressus Crusafont-Pairo and Golpe-Posse 1968

†Dissacus raslanloubatieri Solé et al. 2018

†Dissacus rotundus Wang 1975

†Dissacus rougierae Solé et al. 2018

†Dissacus saurognathus Wortman 1897

†Dissacus serior O'Leary and Rose 1995

†Dissacus serratus Chow and Qi 1978

†Dissacus shanghoensis Chow et al. 1973

†Dissacus willwoodensis O'Leary and Rose 1995

†Dissacus zanabazari Geisler and McKenna 2007

†Dissacus zengi Ting 2004

Invalid names: Hyaenodictis Lemoine 1891 [synonym], Hyoenodictis Lemoine 1880 [synonym], Plesidissacus Lemoine 1894 [synonym]

Diagnosis

No diagnoses are available

Measurements

No measurements are available

Composition:

phosphaticsubp

Environment:

terrestrialsubc

Locomotion:

actively mobilec

Life habit:

ground dwellingf

Diet:

carnivoref

Reproduction:

viviparoussubc

Created:

2005-08-31 14:02:52

Modified:

2005-08-31 16:02:52

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

References: Hendy et al. 2009, Ji et al. 2002, Carroll 1988, Archibald 1998, Lillegraven 1979

Age range: base of the Puercan to the top of the Wasatchian or 66.00000 to 50.50000 Ma

Collections (92 total)

Time interval	Ma	Country or state	Original ID and collection number
Puercan	66.0 - 63.8	USA (New Mexico)	D. navajovius (14703)
Early/Lower Paleocene	66.0 - 61.66	China (Hunan)	D. rotundus (182815)
Early/Lower Paleocene	66.0 - 61.66	China (Guangdong)	D. shanghoensis (140280) Dissacusium shanghoensis (176607)
Torrejonian	63.8 - 60.9	USA (North Dakota)	D. sp. (14821)
Torrejonian	63.8 - 60.9	USA (Wyoming)	D. navajovius (14886) D. sp. (14912)
Torrejonian	63.8 - 60.9	USA (Montana)	D. sp. (14906 14913)
Torrejonian	63.8 - 60.9	USA (New Mexico)	Ankalagon saurognathus, D. navajovius (14873 14893) D. navajovius (14812 14833 14835)
Torrejonian - Tiffanian	63.8 - 56.2	USA (Wyoming)	D. navajovius (14842) D. sp. (14838)
Middle Paleocene	61.66 - 59.24	China (Anhui)	D. magushanensis (132945)
Ti3	60.9 - 56.2	Canada (Alberta)	D. sp. (14928)
Tiffanian	60.9 - 56.2	USA (California)	D. sp. (14872)
Tiffanian	60.9 - 56.2	USA (Montana)	D. sp. (15025 15064)
Tiffanian	60.9 - 56.2	USA (Wyoming)	D. argenteus, D. praenuntius (190462) D. navajovius (15049) D. sp. (14936 14964 14985 15017)
Gashatan	59.24 - 56.0	China (Nei Mongol)	D. serratus (71076)
Late/Upper Paleocene	59.24 - 56.0	China (Anhui (Anhui))	D. magushanensis (176616)
Late/Upper Paleocene	59.24 - 56.0	China (Nei Mongol)	Plagiocristodon serratus, D. serratus (133389)
Late/Upper Paleocene	59.24 - 56.0	Mongolia	D. sp. (133399)
Late/Upper Paleocene	59.24 - 56.0	USA (Wyoming)	D. navajovius (15024)
Thanetian	59.24 - 56.0	France (Champagne-Ardenne)	D. europaeus (68428 87925)
Clarkforkian	56.2 - 54.9	USA (Colorado)	D. navajovius (15254 15258)
Clarkforkian	56.2 - 54.9	USA (Montana)	D. navajovius (15079)
Clarkforkian	56.2 - 54.9	USA (Wyoming)	Creodonta indet. (15075) D. argenteus (190432) D. praenuntius (15087 15092 15099 15102 15103 15104 15121 15122 15126 15129 15131 15132 15144 15148 15157 15159 15163 15185 15186 190430) D. sp. (15089 15094 239208)
Bumbanian	56.0 - 48.07	Mongolia (Southern Mongolia)	D. zanabazari (37206)
Bumbanian	56.0 - 48.07	China (Nei Mongol)	D. sp. (72202)
Early/Lower Eocene	56.0 - 48.07	China (Hunan)	D. sp. (87239)
Early/Lower Eocene	56.0 - 48.07	USA (Wyoming)	D. praenuntius (154253 154254 154255)
Early/Lower Eocene	56.0 - 48.07	China (Shandong)	D. bohaiensis (77929)
Early/Lower Eocene	56.0 - 48.07	China (Nei Mongol)	D. sp. (75275)
MP 10	56.0 - 48.07	Spain (Huesca)	D. blayaci (197266)
MP 10	56.0 - 48.07	Spain	D. progressus (53154)
Ypresian	56.0 - 48.07	France (Marne)	D. filholi (35540)
Ypresian	56.0 - 48.07	France (Alsace-Champagne-Ardenne-Lorraine)	Hyaenodictis filholi (178052)
Ypresian	56.0 - 48.07	France (Aude)	D. sp. (182641)
Ypresian	56.0 - 48.07	Belgium (Hainaut)	Hyaenodictis sp. (87947)
Ypresian	56.0 - 48.07	France (Champagne-Ardenne)	D. raslanloubatieri (28546)
Ypresian	56.0 - 48.07	France (Provence-Alpes-Côte d'Azur)	D. rougierae (178050)
Ypresian	56.0 - 48.07	France (Hérault)	D. blayaci (184624) D. sp. (181563)
Wasatchian	54.9 - 50.5	Mexico (Baja California)	D. sp. (15671)
Wasatchian	54.9 - 50.5	USA (Wyoming)	D. longaevus (46650 46662) D. praenuntius (15458 15759 46809 46816) D. sp. (15541 15559 15594 15729 46830)