Stilwell—Oldest volutes from early Paleogene
Volutidae? (Fulgorariinae?) gen. indet. n. sp. Figure 6H
Dimensions.—OU 41229 height 21.5mm incomplete, diameter of last whorl 13.0mm.
Figured specimens.—OU 41229. Material.—One specimen.
Locality.—East Taieri, Dunedin, Otago, South Island, I44/ f8516.
Stratigraphic range.—Steel Greensand, ‘Wangaloan’ Stage = lower part of Teurian Stage, Danian, lower Paleocene; probably P. golzowense, Wilson (1992a), ca. 64–62 Ma.
Geographic range.—East Taieri, Otago.
Discussion.—This enigmatic shell has been recorded from Wangloa, Boulder Hill or localities in North Otago, but is associated with several ‘Wangaloan’ taxa found at these local- ities. Only the last whorl and part of the penultimate whorl are preserved and the shell is slightly distorted due to compaction. Because of this preservational deficiency, a tentative assessment is given here. The last whorl has an elongate outline, sculpture of
approximately 13 spaced, axially extending ribs that extend to the suture and more than 30 coarse spiral threads, simple suture, a moderately rapid basal constriction, and a seemingly short canal. The complete shell was probably moderately to high- spired fusiform. These features are consistent with fulgorariine volutes such as Fulgoraria s.s., and various subgenera of Fulgoraria (see characteristic extant taxa in Weaver and dupont, 1970, and Paleogene taxa in Oleinik, 1993). A relationship of this inferred, new ‘Wangaloan’ species with Fasciolariidae cannot be discounted, but an affinity with Volutidae: Fulgorar- iinae is preferred.
Acknowledgments
Many colleagues supported this research throughout its long gestation, and I thank them for being so helpful over the years (John Simes and Hamish Campbell, GNS Science, Lower Hutt; Ewan Fordyce, University of Otago, Dunedin; Steve Morton, Monash University, Melbourne). I would like to dedicate this paper to my late colleague and friend, Andrew Grebneff (Uni- versity of Otago), who during our many hours over many years of collecting at Wangaloa and other fossil-rich regions of New Zealand have collectively made leaps in bounds in our knowl- edge of late Mesozoic-early Cenozoic Zealandian faunas— Andrew, you are sorely missed. William J. Zinsmeister (Purdue University, Indiana, USA) and Claudia del Rio (Museo Argen- tino de Ciencias Naturales de B. Rivadavía, Buenos Aires, Argentina) reviewed and enhanced the manuscript with valuable suggestions, and I thank you. This paper was supported by a New Zealand Postgraduate Committee PhD scholarship and Monash University School of Earth, Atmosphere and Environ- ment Research Support grant, both to J.D.S.
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