Krommaster Explained

Krommaster is a genus of early ophiuroids (brittle stars[1]) that lived nearly 410 million years ago in the early Devonian period of South Africa. It was found in the Baviaanskloof formation upper unit, Cape super group, Table Mountain group, Eastern cape. [2] [3] This genus has one species which is Krommaster spinous. This species was discovered alongside Hexuraster, another species of brittle star living in the same area.[4] [5]

Description

This genus is characterized by their moderately large encrinasterid with a disk covered in a mosaic of small, thin scales and extending form the fifth and sixth arm segments. They also have conical pointed spines with similar but smaller spines on the dorsal disk and along the dorsal mid line of the arms.[6]

Notes and References

  1. Web site: The Ophiuroidea . 2023-11-02 . ucmp.berkeley.edu.
  2. Reddy . Caitlin . Thuy . Ben . Reid . Mhairi . Gess . Robert . 2023-10-25 . Earliest known ophiuroids from high palaeolatitude, southern Gondwana, recovered from the Pragian to earliest Emsian Baviaanskloof Formation (Table Mountain Group, Cape Supergroup) South Africa . PLOS ONE . en . 18 . 10 . e0292636 . 10.1371/journal.pone.0292636 . 1932-6203 . 10599496 . 37878550 . free .
  3. 2023-10-25 . Krommaster from the Baviaanskloof Formation, Upper Unit, Cape Supergroup, Table Mountain Group, Eastern Cape South Africa. . 2023-11-02 . figshare . 10.1371/journal.pone.0292636.g005 . en . free .
  4. Reddy . Caitlin . Thuy . Ben . Reid . Mhairi . Gess . Robert . 2023 . Earliest known ophiuroids from high palaeolatitude, southern Gondwana, recovered from the Pragian to earliest Emsian Baviaanskloof Formation (Table Mountain Group, Cape Supergroup) South Africa . PLOS ONE . 18 . 10 . e0292636 . 10.1371/journal.pone.0292636 . 1932-6203 . 37878550 . 10599496 . free .
  5. Web site: Anderson . Natali . 2023-11-01 . 410-Million-Year-Old Brittle Star Fossils Uncovered in South Africa Sci.News . 2023-11-02 . Sci.News: Breaking Science News . en-US.
  6. Reddy . Caitlin . Thuy . Ben . Reid . Mhairi . Gess . Robert . 2023-10-25 . Earliest known ophiuroids from high palaeolatitude, southern Gondwana, recovered from the Pragian to earliest Emsian Baviaanskloof Formation (Table Mountain Group, Cape Supergroup) South Africa . PLOS ONE . en . 18 . 10 . e0292636 . 10.1371/journal.pone.0292636 . 37878550 . 10599496 . 1932-6203 . free .

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