SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

The microvertebrate faunas from ten small pieces of rock from the Öved Sandstone Formation at Klinta (1-10) yielded osteostracan, heterostracan, thelodont, and acanthodian remains, dated here as Whitcliffian. The most important age indicators are the heterostracan Archegonaspis and the thelodont zonal fossil Thelodus sculptilis. The latter taxon is also present in a small Whitcliffian fauna from the Öved Sandstone Formation at Rinnebäcks bro, together with other thelodont and acanthodian remains. From Rinnebäcks bro no previous records of Silurian fish fossils exist. In an attempt to gain a better understanding of nostolepid trunk scale variation and to develop an instrument to assess this variation, seven Nostolepis striata trunk scales from Klinta are...

Fish microfossils from Ramsåsa, site E, Scania, southern Sweden (mid Palaeozoic)

Palavras-chave: Fish scales; Osteostraci; Heterostraci; Thelodonti; Acanthodii; Nostolepid trunk scale variation; Correlation; Whitcliffian; Sweden; 42.81; 38.22.

Ano: 2002

URL: http://www.repository.naturalis.nl/record/219194

Material from three pieces of rock from Ramsåsa, site E, was divided into size fractions 0.106, 0.212, 0.355, 0.425 and 0.5 mm. Larger sizes were absent. The three assemblages were examined and compared with each other, also per fraction, and with residue samples from site E. The latter are proportionately not representative of the faunas of which they must have been part, specimens measuring 0.5 mm or more. The residue labels refer to Ørvig and his student Peyel. The results of the comparison between the assemblages from the rocks and from the residues are hardly complementary. Thelodont scales were obtained almost exclusively from the pieces of rock; acanthodian ‘modified trunk’ scales, spines and jawbones and rare birkeniid remains were restricted to...

Late Silurian fish microfossils from Ramsåsa (sites D and ‘south of church’), Skåne, south Sweden

Palavras-chave: Osteostracans; Anaspids; Thelodonts; Acanthodians; Whitcliffian; Sweden; 38.22; 42.81.

Ano: 2004

URL: http://www.repository.naturalis.nl/record/214516

The microvertebrate assemblages from Ramsåsa sites D and ‘south of church’, Skåne, south Sweden are described for the first time. Analysis of these microvertebrate assemblages from the Öved Sandstone Formation of Skåne indicates a Ludlow rather than Pridoli age. One of two faunas from Ramsåsa site D contained the zonal fossil Thelodus sculptilis and the other T. sculptilis in association with Paralogania ludlowiensis and Thelodus carinatus. The presence of T. carinatus is the youngest record of this species in Laurussia, and indicative of the transitional phase between the Andreolepis hedei and T. sculptilis Zones of the East Baltic Microvertebrate Standard. A fauna with Thelodus parvidens, from south of Ramsåsa church, proved only broadly datable as...

First record of fish microfossils from Ramsåsa, site C, Skåne, southern Sweden

Palavras-chave: Fish scales; Thelodonti; Acanthodii; Correlation; Whitcliffian; Sweden; 42.81; 38.22.

Ano: 2002

URL: http://www.repository.naturalis.nl/record/219195

Within the thelodont dominated fauna of Ramsåsa, site C, Skåne, southern Sweden (Ludlow, Whitcliffian), the scales of the Thelodus parvidens group outnumber those of the combined T. sculptilis-T. admirabilis groups, some specimens of which are indistinguishable. Scale forms that might belong to one of several Thelodus taxa are designated as forma baltica (new form), forma T. radiosus Lehman, and forma T. ramosus Lehman, whereas forma T. querceus Lehman is introduced to cover a particular (heterogeneous?) group of monocuspid scales previously assigned to T. trilobatus Hoppe. Among the acanthodians, Nostolepis striata scales predominate. The checklist of N. striata trunk scales is extended to 62 characters. The smallest nostolepid teeth known so far are...