Prioniodus Pander, 1856

Zhen, Yong Yi, Percival, Ian G. & Webby, Barry D., 2003, Early Ordovician Conodonts from Far Western New South Wales, Australia, Records of the Australian Museum 55 (2), pp. 169-220 : 203

publication ID	https://doi.org/10.3853/j.0067-1975.55.2003.1383
persistent identifier	https://treatment.plazi.org/id/37439A20-CB09-FF1F-FC35-FC97FB6FF99A
treatment provided by	Felipe (2021-08-21 20:31:20, last updated 2023-11-09 19:44:58)
scientific name	Prioniodus Pander, 1856
status

Treatment

Type species. Prioniodus elegans Pander, 1856 .

Remarks. Generic concepts and the apparatus compositions of Prioniodus and Baltoniodus Lindström, 1971 have long been debated. Fåhraeus & Nowlan (1978), and Cooper (1981) regarded the two as separate genera, based mainly on differentiation of the P elements , and also on the nature of the basal cavity. This definition has been more or less accepted by Löfgren (1978), Clark et al. (1981), Sweet (1988), and Stouge & Bagnoli (1988). However, Serpagli (1974) considered Baltoniodus to be a subgenus of Prioniodus , while van Wamel (1974) regarded Baltoniodus as a junior synonym of Prioniodus . Many authors ( Cooper, 1981; Sweet, 1988; Dzik, 1994; Nicoll & Ethington, in press) considered that both genera might have been derived independently from species of Acodus , while Oepikodus may have evolved from Prioniodus ( Dzik, 1983; Sweet, 1988) or also from Acodus (Stouge & Bagnoli, 1999) . In a recent revision of Oepikodus, Nicoll & Ethington (in press) suggested the triform alate Sa elements , and relatively larger basal cavity distinguish both Prioniodus and Baltoniodus from Oepikodus . Sa elements of Prioniodus and Baltoniodus have a lateral process on each side and a long posterior process, but lack an anterior process.

References

Clark, D. L., W. C. Sweet, S. M. Bergstrom, G. Klapper, R. L. Austin, F. H. T. Rhodes, K. J. Muller, W. Ziegler, M. Lindstrom, J. F. Miller & A. G. Harris, 1981. Conodonta. In Treatise on Invertebrate Paleontology, part W, Miscellanea, supplement 2, ed. R. A. Robison. Boulder: Geological Society of America, and Lawrence: University of Kansas.

Cooper, B. J., 1981. Early Ordovician conodonts from the Horn Valley Siltstone, central Australia. Palaeontology 24: 147 - 183.

Dzik, J., 1983. Relationships between Ordovician Baltic and North American Midcontinent conodont faunas. Fossils and Strata 15: 59 - 85.

Dzik, J., 1994. Conodonts of the Mojcza Limestone. In Ordovician carbonate platform ecosystem of the Holy Cross Mountains, ed. J. Dzik, E. Olempska & A. Pisera, Palaeontologica Polonica 53: 43 - 128.

Lindstrom, M., 1971. Lower Ordovician conodonts of Europe. In Symposium on conodont biostratigraphy, ed. W. C. Sweet & S. M. Bergstrom. Geological Society of America, Memoir 127: 21 - 61.

Lofgren, A., 1978. Arenigian and Llanvirnian conodonts from Jamtland, northern Sweden. Fossils and Strata 13: 1 - 129.

Pander, C. H., 1856. Monographie der fossilen Fische des Silurischen Systems der Russisch-Baltischen Gouvernements. St. Petersburg: Akademie der Wissenschaften.

Serpagli, E., 1974. Lower Ordovician conodonts from Precordilleran Argentina (Province of San Juan). Bollettino della Societa Paleontologica Italiana 13: 17 - 98.

Sweet, W. C., 1988. The Conodonta: Morphology, Taxonomy, Paleoecology, and Evolutionary History of a Long-Extinct Animal Phylum. Oxford: Clarendon Press.

van Wamel, W. A., 1974. Conodont biostratigraphy of the Upper Cambrian and Lower Ordovician of north-western Oland, south-eastern Sweden. Utrecht Micropalaeontological Bulletins 10: 1 - 125.