Goleroconus alfi McKenna, Honey, and Lofgren, 2008

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 : 39-40

Goleroconus alfi McKenna, Honey, and Lofgren, 2008

HOLOTYPE: RAM 7171 , right dentary with p4–m2 and part of trigonid of m3 from RAM locality V200120, member 4b, Goler Formation , California.

REFERRED SPECIMENS: RAM 6506, rm2, RAM 6417, lp3, UCMP 131790, lm2, UCMP 44761, left dentary fragment with m3, UCMP 49487, rm3 fragment from RAM locality V94014 , member 4a.

DISCUSSION: UCMP 44761 was the first mammalian specimen described from the Goler Formation and was referred to cf. Conacodon entoconus ( McKenna, 1955) . Study of additional isolated teeth of this taxon recovered from the same site as UCMP 44761 resulted in revised referrals: “unnamed genus and species of anisonchine periptychid” ( McKenna, 1960: 12) and “unnamed genus and species of conacodontine periptychid” ( McKenna et al., 1987: 36). In 2001, J. Honey collected a partial dentary with multiple teeth (RAM 7171) that served as an adequate holotype for description of the new genus and species, Goleroconus alfi ( McKenna et al., 2008: figs. 3–6 ), which is only known from the Goler Formation.

MESONYCHIA Van Valen, 1969

Figures

FIGURE 3. Occlusal views of mandibles of Nannodectes lynasi, new species. A. RAM 9044, holotype of Nannodectes lynasi, right dentary fragment with damaged i1, alveolus of p2, p3–m3 from RAM locality V200510. B. RAM 9429, right dentary fragment with i1 root and p3–m3 from RAM locality V200706. C. RAM 10029, right dentary fragment with damaged p4–m3 from RAM locality V200804.

FIGURE 5. Upper dentition of Nannodectes lynasi. A. Occlusal view of RAM 6431, left I1 from RAM locality V98012. B. Occlusal view of RAM 6929, left I1 from RAM locality V98012. C. Occlusal view of RAM 9668, left maxilla fragment with C, alveoli of P2–3, and P4–M1 from RAM locality V200510. D. Occlusal view of RAM 6931, left P3 from RAM locality V98012. E. Occlusal view of right P4 of RAM 9669, skull fragment with broken I1, right P4, M1–2 and associated right p3 from RAM locality V200510; F. occlusal view of right M1–2 of RAM 9669. G. Occlusal view of RAM 6962, left M2 from RAM locality V98012. H. Occlusal view of RAM 6957, partial left M3 from RAM locality V98012.

FIGURE 6. Dentition of oxyclaenids and arctocyonids. A. Occlusal view of RAM 9041, right m1 of Thryptacodon sp. from RAM locality V200510. B. Occlusal view of RAM 15622, right dentary fragment with talonid of p4, and m1–2 of Mimotricentes tedfordi from RAM locality V201014; C. oblique labial view of RAM 15622. D. Occlusal view of RAM 9670, left dentary fragment of Mimotricentes tedfordi with damaged m1 and base of p4 from RAM locality V200510. E. Occlusal view of RAM 6928, right dentary fragment of Mimotricentes tedfordi with m3 talonid and base of trigonid from RAM locality V200001. F. Occlusal view of RAM 9040, right M1 of Lambertocyon cf. L. gingerichi from RAM locality V200001. G. Occlusal view of RAM 9043, left p3 fragment of Lambertocyon cf. L. gingerichi from RAM locality V200001. H. Occlusal view of RAM 9660, premolar of undetermined arctocyonid from RAM locality V200613.