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| Titel: |
A new birkeniid anaspid from the Upper Silurian of Skåne, south Sweden |
| Auteur: |
Blom, Henning Marss, Tiiu Miller, C. Giles |
| Verschenen in: |
GFF |
| Paginering: | Jaargang 125 (2003) nr. 2 pagina's 57-61 |
| Jaar: |
2003-06-01 |
| Inhoud: |
A new anaspid, Ramsaasalepis porosa gen. et sp. nov. is described from the Upper Silurian Oved-Sandstone Formation at Ramsåsa, Skåne, south Sweden. Ramsaasalepis is based on a number of disarticulated scales and plates, characterised by its ridge-like scale sculpture with fine lateral ridgelets. Its histology is also unique, with a well-developed vascular canal system that differs from that of all other known birkeniid anaspids. Ramsaasalepis is probably closest related to Septentrionia Blom, Marss & Miller 2002 and Tahulalepis Blom, Marss & Miller 2002 based mainly on the ridged scale sculpture, well-developed vascular canal system and stratigraphical range. The refined fossil record of anaspids is discussed, emphasising on the recognition of morphological trends that correlates badly with previously suggested phylogenies. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
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