Search the Community
Showing results for tags 'ptychagnostus'.
-
A rangeomorph holdfast trace fossil from the Ediacara formation, Rawnsley quartzite of the Flinders Range, South Australia. This specimen is Medusina mawsoni, so called because it was until recently thought to be a jellyfish, but is now believed to be the attachment point of a fractal rangeomorph as Charniodiscus is the point of anchorage for Charnia sp. This one may have been the holdfast point for some species of Rangea. The diameter of the outer circle is 1.5 cm and the fossil is estimated to be 555 million years old.
- 177 replies
-
- 7
-
- achlysopsis
- acorn worm
-
(and 71 more)
Tagged with:
- achlysopsis
- acorn worm
- acrothele
- acrothele subsidua
- afon mawwdach
- agnostid
- ajax mine
- algae
- altiocculus
- altiocculus harrisi
- alum shale
- antelope springs
- anti atlas
- aphelaspis
- aphelaspis brachyphasis
- archaeocyathid
- asaphiscus
- asaphiscus wheeleri
- australia
- barrandagnostus
- barrandagnostus inexpectans
- barrios fascies
- beltane
- biwabek
- biwabek formation
- bolaspidella
- bolaspidella housensis
- bradoriid
- bradoriida
- brantevik
- british colombia
- california
- cambrian
- cambropallas
- cambropallas telesto
- canada
- chambless limestone
- chengjiang
- chengjiang biota
- china
- choia
- choiidae
- collenia
- collenia undosa
- conasauga formation
- conasauga river
- cranbrook
- cricocosmia
- cricocosmia jinningensis
- crumillospongia
- ctenopyge
- ctenopyge affinis
- cyanobacteria
- czech republic
- czechoslovakia
- diandongia
- diandongia pista
- dolgellau
- early cambrian
- east kootenay mountains
- ediacaran
- ellipsocephalid
- ellipsocephalus
- ellipsocephalus hoffi
- elrathia
- elrathia kingii
- embalse del luna
- enteropneusta
- eoorthis
- eoorthis primordialis
- ethmocyathus
- ethmocyathus lineatus
- fali
-
From the album: Adam's Cambrian
Agnostid Trilobite Kingdom: Animalia Phylum: Arthropoda Class: Trilobita Order: Agnostida Family: Ptychagnostidae Genus: Ptychagnostus Species: gibbus Author Citation Linnarsson 1869 Geological Time Scale Eon: Phanerozoic Era: Paleozoic Period: Cambrian Epoch: Middle Stratigraphy St Davids Sediments Biostratigraphy Paradoxides Series Provenance Acquired by: Purchase/Trade Location Road cutting, 300 m S.W. of Cement works. Slammerstad, Oslo Norway Listed as St.David's, Paradoxides Series. About 505 million years old.