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Ramsaasalepis

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Ramsaasalepis
Temporal range: Upper Silurian [1]
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Anaspida
Order: Birkeniiformes
Family: Ramsaasalepididae
Blom, Märss & Miller, 2002
Genus: Ramsaasalepis
Blom, Märss & Miller, 2002
Species

Ramsaasalepis porosa Blom et al., 2002 (type)

Ramsaasalepis is an extinct genus of jawless fish. It is the type and the only known genus of the family Ramsaasalepididae, one of many families of prehistoric jawless fish, and contains the single species Ramsaasalepis porosa.[1]

It was described based on a number of fossilized, disarticulated thelodont scales that may have had a ridged texture. The species had a well-developed vascular canal system. Based on these characteristics and its stratigraphical range, is speculated to be most closely related to the genera Septentrionia and Tahulalepis.[1]

Ramsaasalepis lived during the Silurian period. Competition with recently evolved jawed fish has been suggested as a reason for the extinction of this and many other jawless fish species. It probably was a filter feeder.[1]

References

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  1. ^ a b c d Henning Blom; Tiiu MärssTallinn; C. Giles Miller (2003). "A new birkeniid anaspid from the Upper Silurian of Skåne, south Sweden". GFF. 125 (2): 57–61. Bibcode:2003GFF...125...57B. doi:10.1080/11035890301252057. S2CID 129645520.
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