Golding and Orchard—A new conodont genus from the Triassic of North America
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from B.C. is excluded from the present definition of the species, and is instead considered to belong to Magnigondolella julii n. gen. n. sp.
Magnigondolella salomae n. gen. new species Figure 9
2014 Neogondolella ex gr. regalis morphotype eta; Golding, p. 130, fig. 2.36, parts 1–6.
2014a Neogondolella ex gr. regalis morphotype A; Golding et al., p. 171, Pl. 2, figs. 4–6.
2014b Neogondolella ex gr. regalis morphotype D; Golding et al., fig. 3.22–3.24.
Holotype.—GSC Type No. 131598 (Fig. 9.7–9.9), from the Paracrochordiceras americanum Zone (lower Anisian) of the Toad Formation, GSC Cur. No. C-302187, Mile Post 375 East, northeastern B.C.
Figure 8. Magnigondolella regalis (Mosher). (1–3) GSC Type No. 25048 (holotype), from the Toad Formation (Tetsaoceras hayesi Zone, middle Anisian), GSC Cur. No. O-68294, Mile Post 375 West, B.C.
1970 Neogondolella regale Mosher, p. 741, pl. 110, figs. 1, 4 (only).
1977 Neogondolella regale; Nicora, pl. 5, fig. 3b (only).
Diagnosis.—A species of Magnigondolella n. gen. in which the relatively narrow platform of the P1 element is widest at, or just posterior to themidpoint of the element, and tapers evenly to both the anterior and posterior ends. The upper profile of the carina is uniformly straight along its length, with little to no curvature.
1976 Neogondolella regale; Wang and Wang, pl. 4, fig. 7 (only).
Holotype.—GSC Type No. 25048 (Fig. 8.1–8.3), from the Tetsaoceras hayesi Zone (middle Anisian) of the Toad Formation, GSC Cur. No. O-68294, Mile Post 375 West, northeastern B.C.
Emended diagnosis.—Species of Magnigondolella n. gen. in which the P1 element has a platform that is widest at the midpoint of the element, and maintains its width nearly to the anterior end. The platform margins are strongly upturned, producing deep adcarinal grooves. The upper profile of the carina is uniformly straight along its length, with no curvature. The keel is very wide and deeply excavated.
Occurrence.—Middle Anisian (Testsaoceras hayesi Zone) of B.C. (Mosher, 1970; this study); middle Anisian of Nevada (Mosher, 1968; Nicora, 1977); and middle Ansian of Tibet (Wang and Wang, 1976).
Materials.—One specimen from B.C.
Comparisons.—The upper margin of the carina of Magnigondolella regalis is similar to that of M. salomae n. sp., which differs from M. regalis by possessing a flatter, more anteriorly tapered platform, and a shallower keel.
Remarks.—The revised, more restricted diagnosis of this spe- cies includes only forms similar to the holotype, which was described from the Tetsaoceras hayesi Zone in B.C. (Mosher, 1970), and is re-illustrated in Figure 8. This is the only specimen of this species to be recovered in B.C. thus far. After examina- tion of the original specimen, Mosher’s (1970) figured paratype
Occurrence.—Lower Anisian (Paracrochordiceras americanum Zone) to upper Anisian of B.C. (Golding, 2014; Golding et al., 2014a, b; this study); and middle Anisian (Intornites mctaggarti Subzone to Isculites constrictus Subzone, Acrochordiceras hyatti Zone) of Nevada (this study).
Etymology.—Named for Salome Alexandra, Queen of Judea.
Materials.—Five specimens from B.C.; five specimens from Nevada.
Comparisons.—See above for comparisons with Magnigondolella regalis andM. julii n. sp.
Magnigondolella new species A Figure 10
Occurrence.—Middle Anisian (Intornites mctaggarti Subzone to Unionvillites hadleyi Subzone, Acrochordiceras hyatti Zone) of Nevada (this study).
Description.—A species of Magnigondolella n. gen. in which the platform of the P1 element is widest at the midpoint, and
narrows rapidly in the posterior third to form a very narrow, flange-like platform that continues to the end of the element.
Comparisons.—See above for comparisonwithMagnigondolella julii n. gen. n. sp.
Remarks.—Thus far, only four specimens of Magnigondolella n. sp. A have been recovered from three samples in Nevada, so despite its distinctive morphology, this species is kept in open nomenclature until its geographic and stratigraphic range can be determined.
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