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Silurian chitinozoa from gotland sweden

Silurian chitinozoa from gotland sweden

Fossils and Strata (5): 1-130

Silurian chitinozoans from 475 localities in the Late Llandoverian through Ludlovian of Gotland, Sweden, are discussed and 64 spp. are described. One genus, GOTLANDOCHITINA, and 31 spp. [Ancyrochitina ansarviensis, A. gutnica, A. pachyderma, A. pedavis, Conochitina argillophila, C. flamma, C. granosa, C. gutta, C. lauensis, C. leptosoma, C. mamilla, C. visbyensis, Desmochitina hemsiensis, D. muldiensis, D. opaca, D. squamosa, Eisenackitina philipi, Gotlandochitina corniculata, G. cornuta, G. martinssoni, G. militaris, G. tabernaculifera, G. uncinata, G. valbyttiensis, G. villosa, Linochitina convexa, L. hedei, L. odiosa, Sphaerochitina concava, S. impia, S. lycoperdoides ] are described as new. The micromorphology of the ornamentation, appendices, prosome, operculum and vesicle wall is discussed. The abundance and diversity of the chitinozoans of Gotland were calculated and are discussed in connection with a paleoecologic interpretation. A method for calculating the productivity in oceans of earlier times is briefly sketched. The systematic position of the chitinozoans is discussed, and it is concluded that they were eggs of polychaetes and gastropods. The local range zones of the chitinozoans in the Silurian of Gotland are established, and some consequences in the correlation are indicated.

Accession: 006415940

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