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  Estonian Journal of Earth Sciences

ISSN 1736-7557 (electronic)  ISSN 1736-4728 (print)
An international scientific journal

Formerly: Proceedings of the Estonian Academy of Sciences, Geology
Published since 1952

Estonian Journal of Earth Sciences

ISSN 1736-7557 (electronic)  ISSN 1736-4728 (print)
An international scientific journal

Formerly: Proceedings of the Estonian Academy of Sciences, Geology
Published since 1952

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SHORT COMMUNICATION: Kaljoprion – a new enigmatic jawed polychaete genus from the Upper Ordovician of Estonia; 256–259

(Full article in PDF format) doi:10.3176/earth.2008.4.05


Authors

Olle Hints

Abstract

A new Late Ordovician polychaete genus Kaljoprion, with K. laevaensis gen. et sp. nov. as the type species, is described from the Nabala Regional Stage of the Laeva-18 drill core, central Estonia. The genus has a labidognath-type apparatus with the first and second maxillae equipped with anterior denticles developed into characteristic transversal ridges. Similar dentaries are observed in the jaws of distantly related Rhytiprion, suggesting a common feeding habit of both genera and representing a case of convergent evolution among Palaeozoic polychaetes.

Keywords

scolecodonts, jawed polychaetes, taxonomy, convergent evolution, Late Ordovician, Estonia.

References

Bergman , C. F. , Eriksson , M. E. & Calner , M. 2003. The jawed annelid Rhytiprion magnus Kielan-Jaworowska , 1966 – a muddy bottom dweller. GFF , 125 , 191–199.

Dales , R. P. 1963. Annelids. Hutchinson University Library , London , 200 pp.

Eriksson , M. E. , Bergman , C. F. & Jeppsson , L. 2004. Silurian scolecodonts. Review of Palaeobotany and Palynology , 131 , 269–300.
doi:10.1016/j.revpalbo.2004.04.001

Grube , A. E. 1850. Die Familien der Anneliden. Archiv für Naturgeschichte , Berlin , 16 , 249–364.

Hints , O. 1998. Late Viruan (Ordovician) polychaete jaws from North Estonia and the St. Petersburg Region. Acta Palaeontologica Polonica , 43 , 471–516.

Hints , O. 2000. Ordovician eunicid polychaetes of Estonia and surrounding areas: a review of their distribution and diversification. Review of Palaeobotany and Palynology , 113 , 41–55.
doi:10.1016/S0034-6667(00)00051-8

Hints , O. & Eriksson , M. E. 2007. Diversification and bio­geography of scolecodont-bearing polychaetes in the Ordovician. Palaeogeography , Palaeoclimatology , Palaeo­ecology , 245 , 95–114.
doi:10.1016/j.palaeo.2006.02.029

Jansonius , J. & Craig , J. H. 1971. Scolecodonts: I. Descriptive terminology and revision of systematic nomenclature; II. Lectotypes , new names for homonyms , index of species. Bulletin of Canadian Petroleum Geology , 19 , 1–251.

Kielan-Jaworowska , Z. 1966. Polychaete jaw apparatuses from the Ordovician and Silurian of Poland and a comparison with modern forms. Palaeontologia Polonica , 16 , 1–152.

Raukas , A. & Teedumäe , A. (eds). 1997. Geology and Mineral Resources of Estonia. Estonian Academy Publishers , Tallinn , 436 pp.
 
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Current Issue: Vol. 66, Issue 4, 2017




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