Margaretia dorus - Bolaspidella housensis
Vendor: Gold Bugs
SKU Number: SQ4041314
Burgess Shale fauna from the Red Beds of the Middle Cambrian, Wheeler Shale, Utah. This large example of Margaretia dorus is associated with the small trilobite species Bolaspidella housensis.
Margaretia is considered by some to be the construct of the tube building worm Oesia, based on the research from a recent publication. These red examples are exceptional for their high contrast of color and detail of preservation. These fossils are normally poorly preserved and are very faint.
Margaretia is a hemichordate. Hemichordates appear in the Lower or Middle Cambrian and include two main classes: Enteropneusta (acorn worms - detritus feeders, eating sand or mud and extracting organic detritus), and Pterobranchia (small colonial worm-like filter-feeders).
The small red Boaspidella trilobite is a bonus! Full dimensions are listed below.
Full dimensions are listed below.
Vendor: Gold Bugs
SKU Number: SQ4041314
Burgess Shale fauna from the Red Beds of the Middle Cambrian, Wheeler Shale, Utah. This large example of Margaretia dorus is associated with the small trilobite species Bolaspidella housensis.
Margaretia is considered by some to be the construct of the tube building worm Oesia, based on the research from a recent publication. These red examples are exceptional for their high contrast of color and detail of preservation. These fossils are normally poorly preserved and are very faint.
Margaretia is a hemichordate. Hemichordates appear in the Lower or Middle Cambrian and include two main classes: Enteropneusta (acorn worms - detritus feeders, eating sand or mud and extracting organic detritus), and Pterobranchia (small colonial worm-like filter-feeders).
The small red Boaspidella trilobite is a bonus! Full dimensions are listed below.
Full dimensions are listed below.
Vendor: Gold Bugs
SKU Number: SQ4041314
Burgess Shale fauna from the Red Beds of the Middle Cambrian, Wheeler Shale, Utah. This large example of Margaretia dorus is associated with the small trilobite species Bolaspidella housensis.
Margaretia is considered by some to be the construct of the tube building worm Oesia, based on the research from a recent publication. These red examples are exceptional for their high contrast of color and detail of preservation. These fossils are normally poorly preserved and are very faint.
Margaretia is a hemichordate. Hemichordates appear in the Lower or Middle Cambrian and include two main classes: Enteropneusta (acorn worms - detritus feeders, eating sand or mud and extracting organic detritus), and Pterobranchia (small colonial worm-like filter-feeders).
The small red Boaspidella trilobite is a bonus! Full dimensions are listed below.
Full dimensions are listed below.
Additional Information
Margaretia is a Burgess Shale fauna from the Cambrian Period that is also found in the Wheeler Shale Lagerstätte of Utah.
Margaretia belongs to the the class: Enteropneusta, these are acorn worms, detritus feeders eating sand or mud and extracting organic detritus.
They live in U-shaped burrows on the sea-bed, from the shoreline down to a depth of 10,000 ft. (3,050 m). The worms lie there with the proboscis sticking out of one opening in the burrow. Acorn worms are generally slow burrowers. To obtain food, many acorn worms swallow sand or mud that contains organic matter and microorganisms in the manner of earthworms (this is known as deposit feeding). At low tide, they stick out their rear ends at the surface and excrete coils of processed sediments (casts). Another method that some acorn worms use to obtain food is to collect suspended particles of organic matter and microbes from the water. This is known as suspension feeding.
References:
The Wheeler Shale formation was named by Charles Doolittle Walcott. The Wheeler is a Konzentrat-Lagerstätte of soft tissued organisms preserved as carbonaceous film on calcareous shale, shaley limestone, mudstone and thin flaggy limestone.
Bollaspidella is a member of the order: Ptychopariida, a large heterogeneous order of trilobite containing some of the most primitive species known. The earliest species occurred in the second half of the Lower Cambrian, and the last species did not survive the Ordovician–Silurian extinction event.
References:
Wheeler Shale Formation
Charles Doolittle Walcott
Ptychopariida
