Eurasian Craspeditid genera Temnoptychites and Tollia in the by J. A Jeletzky

By J. A Jeletzky

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Additional info for Eurasian Craspeditid genera Temnoptychites and Tollia in the lower Valanginian of Sverdrup Basin District of Franklin, with comments on taxonomy and nomenclature of Craspeditidae

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Kemperi n. sp. has only 12 to 14 bullae at comparable growth stages. The holotype of T. hoplitoides has either 19 or 20 bullate primaries and about 60 secondaries at the whorl diameter of about 23 mm (Nikitin, 1888, Pl. II, fig. 1; Bodylevsky, 1967, p. 105, Pl. IV, fig. 2a) and the smaller paratype (Nikitin, 1888, Pl. II, fig. 2), about 19 primaries. Finally, the imperfectly preserved holotype of T. , fig. 6) is estimated to have about 17 primaries and about 80 secondaries at the whorl diameter of about 25 mm.

7, fig. ID, F). The short exposed segment of the earUest visible whorl (Pl. 7, fig. 2A) is ornamented to the oral end by dichotomous ribs closely resembling those of T. grandiosus in strength and orientation. The long (Tollia-Mke), prominent but pinched and entirely nonbullate primaries are sharp topped in the shell-covered and steinkern preservation. They begin at the umbiUcal seam and cross the umbiUcal wall on a somewhat backward directed course, gradually thickening toward the umbilical shoulder.

24075 and 28713 occur at about the middle of the Deer Bay Formation as developed in the Weather Station Syncline. Neither the exact stratigraphic position of these fossil localities nor the stratigraphic relationships of their Tollia-nodeless Temnoptychites (Costamenjaites) fauna with other Valanginian and Berriasian ammonite faunas of Sverdrup Basin are known. However, this fauna is inferred to be from the equivalents of the lowermost Valanginian Undulatoplicatilis Zone for reasons explained below in the biochronological section (Textfig.

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