Bessoecetor septentrionalis Scott et al., 2002

Lofgren, Donald, Mckenna, Malcolm, Honey, James, Nydam, Randall, Wheaton, Christine, Yokote, Bryan, Henn, Lexington, Hanlon, Whitney, Manning, Stephen & Mcgee, Carter, 2014, New records of eutherian mammals from the Goler Formation (Tiffanian, Paleocene) of California and their biostratigraphic and paleobiogeographic implications, American Museum Novitates 2014 (3797), pp. 1-60 : 5-6

publication ID

https://doi.org/ 10.1206/3797.1

persistent identifier

https://treatment.plazi.org/id/587387C9-143C-5168-FE29-1EFEFC3CFAF6

treatment provided by

Carolina

scientific name

Bessoecetor septentrionalis Scott et al., 2002
status

 

Bessoecetor septentrionalis Scott et al., 2002

HOLOTYPE: AMNH 33810 View Materials , left dentary with p2–m3 from Scarritt Quarry, Fort Union Formation , Montana.

REFERRED SPECIMEN: RAM 9099, right dentary fragment with m2–m3 from RAM locality V200510, member 4a ( fig. 2A–B View FIGURE 2 ).

DESCRIPTION AND DISCUSSION: ” Propalaeosinopa ” was the generic name employed for a common North American Torrejonian–Tiffanian pantolestid, but Scott et al. (2002) demonstrated that the type of “ Propalaeosinopa ,” P. albertensis , is a nomen dubium. Van Valen (1967) originally proposed the synonymy of Bessoecetor thomsoni , B. diliculi , and “ Propaleosinopa ” albertensis . Scott et al. (2002) argued that B. diliculi is identical to the type of “ Diacodon septentrionalis described by Russell (1929), and thus has priority. Scott et al. (2002) then resurrected Bessoecetor and transferred the four species of “ Propaleosinopa ” ( P. thomsoni , P. dilucli , P. albertensis , P. septentrionalis ) to the new combination, Bessoecetor septentrionalis . This synonymy was provisionally followed by Secord (2008), but he noted that the type specimen of the genus should be the holotype of B. thomsoni (AMNH 33810) from Scarritt Quarry, not the type of “ Diacodon septentrionalis (UALVP 126).

The m2–m3 of RAM 9099 have tall trigonids with large protoconids and metaconids and small paraconids that are shifted labially and low talonids with large hypoconids and slightly smaller entoconids, with small and medially placed hypoconulids ( fig. 2A–B View FIGURE 2 ); features present in both known species of Bessoecetor , B. septentrionalis and B. pilodontus . However, B. septentrionalis can be differentiated from B. pilodontus by size, although teeth of B. pilodontus and B. septentrionalis may overlap slightly in length ( Secord, 2008). Tooth dimensions of RAM 9099 are very similar to the holotype of B. septentrionalis and are significantly smaller than the holotype of B. pilodontus ( table 1). Therefore, RAM 9099 is referred to B. septentrionalis .

Order CARNIVORA Bowdich, 1821 View in CoL

Family VIVERRAVIDAE Wortman and Matthew, 1899

Kingdom

Animalia

Phylum

Chordata

Class

Mammalia

Order

Cimolesta

Family

Pantolestidae

Genus

Bessoecetor

Loc

Bessoecetor septentrionalis Scott et al., 2002

Lofgren, Donald, Mckenna, Malcolm, Honey, James, Nydam, Randall, Wheaton, Christine, Yokote, Bryan, Henn, Lexington, Hanlon, Whitney, Manning, Stephen & Mcgee, Carter 2014
2014
Loc

VIVERRAVIDAE

Wortman and Matthew 1899
1899
Loc

CARNIVORA

Bowdich 1821
1821
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