- The Lower-Middle
Cambrian animal Rhabdotubus is the
earliest known pterobranch. It
bears strong similarity to the
graptolites -
indeed for some time it...
-
start of the Cambrian, 542 million
years ago. The Mid
Cambrian fossil Rhabdotubus johanssoni has been
interpreted as a
pterobranch hemichordate. Opinions...
- Shale, is now
regarded as a
primitive chordate. The Mid
Cambrian fossil Rhabdotubus johanssoni has been
interpreted as a
pterobranch hemichordate, whereas...
- †Rhabdopleurites Kozlowski, 1967 †Rhabdopleuroides Kozlowski, 1961 †
Rhabdotubus Bengtson & Urbanek, 1986 †Sphenothallus Chapman, 1917 non Hall, 1847...
-
Rhabdopleuridae Kozłowski, 1967
Rhabdopleuroides Rhabdopleuridae Kozłowski, 1961
Rhabdotubus Rhabdopleuridae Bengtson & Urbanek, 1986 ?Sphenoecium Rhabdopleuridae...
