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Ottoia

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Ottoia
220px-Ottoia burrowing
Name Ottoia
family Ottoiidae
Class Archaeopriapulida
Phylum Priapulida (Stem-Group)
Period Middle Cambrian 507-505 Million Years Ago (Wheeler - Burgess Shale)
Location Australia
Diet Carnivore
Length 8 cm
Ottoia is the most abundant priapulid of the Cambrian Burgess Shale formation of British Columbia. It is a stem-group p
EP ottoia

Ottoia 3D

riapulid worm that averaged about 80 mm in length.

In 1910's they founded Ottoia, Fieldia, Ancalagon (Not named yet) and Louisella and Walcott named the word Selkirkia.

In 1938 they founded a fosill of a Selkirkia.

In 1977 they founded more types of priapulid-like burrows are Selkirkia, Scolecofurca and Lecythioscopa even Ancalagon was named by Conway Morris.

Along with the other Cambrian priapulids Fieldia, Selkirkia, Louisella, Ancalagon, Scolecofurca, and Lecythioscopa, the organism was originally classified into a clade termed the archaeopriapulida, a stem group to the Priapulids
Ottoia prolifica

Ottoia Fossil

proper. However, the morphological similarity of these organisms to their modern cousins is remarkable, especially for the Burgess Shale, and their similarity to the modern genus Maccabeus suggests that they are in the Seticoronaria stem group, and thus are true crown-group priapulids. A phylogenetic analysis does not provide a great deal of resolution to the relationships between these basal worms.

Paleobiology

Ottoia was an 8cm predatory worm that lived most of its life in burrows. Like most worms, it was round and lengthy, with no backbone. It also lived in small U-shaped burrows that it had dug in the sea floor, which it would also use as ambush hiding places. It lived in the Mid Cambrian, about 520 million years ago, and lived alongside invertebrates like Anomalocaris and Hallucigenia. One feature that seperated it from mos
OttoiaBakay560

Ottoia and Dinomischus

t worms is that it was a highly-active ambush predator towards snail-like mollusks. It had a round mouth piece towards its head that had 40 to 50 spikes on it, possibly for grasping onto struggling prey. The posterior end of Ottoia also had small hooks, which likely acted as anchors to hold itself in the ground. Fossil evidence also suggests that when needed, Ottoia was cannibalistic, and would kill and eat its own. They eat Waptias, Trilobites and Aysheaia. They maybe eat Fieldia (Because Fieldia was a small Priapulid worm of the Cambrian). They can get eaten by Anomalocaris, Peytoia and Hurdia.

In Popular Culture

An Ottoia was eating a mollusc (In the picture in the Infobox) and got eaten by a Hurdia in the Website The Burgess Shale on Virtual Sea Odyssey on the Predators or Early Life Predators.

It was a major inspiration for the giant priapulid flesh eating monsters in the 2005 Peter Jackson remake of King Kong (the ones living at the bottom of the cess pit)

References

http://en.wikipedia.org/wiki/Ottoia

http://paleobiology.si.edu/burgess/ottoia.html

http://www.fossilmuseum.net/Fossil_Sites/burgessshale/Ottoia/Ottoia.htm

http://burgess-shale.rom.on.ca/en/fossil-gallery/view-species.php?id=95&ref=i&

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