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Journal of Paleontology 92(2):207–220
Occurrence.—Middle Anisian (Tetsaoceras hayesi Zone) to upper Anisian of B.C. (Mosher, 1970; Orchard and Bucher, 1992; Golding, 2014; Golding et al., 2015; this study); and lower Anisian (Lenotropites caurus Zone) to middle Anisian (Unionvillites hadleyi Subzone, Acrochordiceras hyatti Zone) of Nevada (this study).
Etymology.—Named for Gaius Julius Caesar, Dictator of the Roman Republic.
Materials.—15 specimens from B.C.; 41 specimens from Nevada.
Comparisons.—The constricted posterior platform of Magnigondolella julii n. gen. n. sp. serves to distinguish it from most other species of the genus. The posterior platform of M. n. sp. A narrows markedly, but it is not constricted. Some specimens of M. salomae n. sp. possess a small posterior plat- form constricton, but the carina has a straight upper margin. Paragondolella szaboi also possesses a posterior platform constriction, but its convex carina that is highest near the mid- point of the element differs from that ofM. julii n. sp. The high, fused carina of M. julii n. sp. differentiates it from species of Neogondolella that have posterior platform constrictions, including the N. constricta group and the N. transita group.
Magnigondolella nebuchadnezzari new genus new species Figure 7
2014 Neogondolella ex gr. regalis morphotype theta; Golding, p. 131, fig. 2.37, parts 1–6 (only).
2014b Neogondolella ex gr. regalis morphotype C; Golding et al., fig. 3.13–3.15.
Holotype.—GSC Type No. 131506 (Fig. 7.10–7.12), from the Tetsaoceras hayesi Zone (middleAnisian) of the Toad Formation, GSC Cur. No. C-101077,Mile Post 375 East, northeastern B.C.
Diagnosis.—Species of Magnigondolella n. gen. in which the P1 element has a biconvex platform that is widest at the mid- point of the element and remains broad to the posterior end. The posterior platform margin is rounded and a narrow posterior platform brim is present. The anterior platform margins may develop a weak crenulation. The carina is deflected downwards at the posterior end of the element.
Occurrence.—Middle Anisian (Tetsaoceras hayesi Zone) to upper Anisian of B.C. (Golding, 2014; Golding et al., 2014b; this study); and lower Anisian (Pseudokeyserlingites guexi Zone) to middle Anisian (Unionvillites hadleyi Subzone, Acrochordi- ceras hyatti Zone) of Nevada (this study).
Etymology.—Named for Nebuchadnezzar II, King of Babylon.
Materials.—14 specimens from B.C.; 23 specimens from Nevada.
Comparisons.—The wide posterior platform and presence of a posterior platform brim serve to distinguish Magnigondolella nebuchadnezzari n. gen. n. sp. from most other species of the genus. Specimens of M. cyri n. sp. have wide posterior plat- forms, and some may possess a posterior platform brim; how- ever, the platform of M. cyri n. sp. is longer and narrower than that ofM. nebuchadnezzari n. sp., and the carina ofM. cyri n. sp. has more numerous denticles.
Remarks.—The holotype of this species was figured previously in Golding et al. (2014b), where it was erroneously labeled as coming from the Mile Post 375 West section.
Magnigondolella regalis (Mosher, 1970) Figure 8
1968 Gondolella mombergensis Tatge; Mosher, pl. 116, fig. 15 (only).
Figure 7. Magnigondolella nebuchadnezzari n. gen. n. sp. (1–3) GSC Type No. 131594, from the Doig Formation (lower Anisian), GSC Cur. No. V-002992, Petro-Canada Kobes d-048-A/094-b-09 well, B.C.; (4–6) GSC Type No. 131595, from the Prida Formation (Intornites mctaggarti Subzone, Acrochordiceras hyatti Zone, middle Anisian), GSC Cur. No. C-176324, Congress Canyon, northern Humboldt Range, Nevada; (7–9) GSC Type No. 131596, from the Toad Formation (Tetsaoceras hayesi Zone, middle Anisian), GSC Cur. No. O-68294, Mile Post 375 West, B.C.; (10–12) GSC Type No. 131506 (holotype), from the Toad Formation (Tetsaoceras hayesi Zone, middle Anisian), GSC Cur. No. C-101077, Mile Post 375 East, B.C.
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