Gogia

Gogia is a genus of primitive eocrinoid blastozoan from the early to middle Cambrian.

Gogia
Temporal range: Late Early Cambrian–Middle Cambrian
G. kitchnerensis specimen from Utah
A colourful reconstruction of G. ojenai
Scientific classification
Kingdom:
Animalia
Phylum:
Echinodermata
Subphylum:
†Blastozoa
Class:
†Eocrinoidea
Order:
†Gogiida
Family:
†Eocrinidae
Genus:
†Gogia

Walcott 1917
Type species
†G. prolifica
Species
  • G. prolifica Walcott 1917 [1]
  • G. (Eocrinus) longidactylus (Walcott 1886) Robison 1965[2]
  • G. granulosa Robison 1965[2]
  • G. multibrachiata (Kirk 1945) Robison 1965[2]
  • G. spiralis Robison 1965[2]
  • G. ojenai Durham 1978[3]
Synonyms

G. ojenai dates to the late Early Cambrian;[3] other species come from various Middle Cambrian strata throughout North America, but the genus has yet to be described outside this continent.[2] Notable localities where species are found include the Wheeler Shale of Utah,[4] and the Burgess Shale of British Columbia.

The species of Gogia, like other eocrinoids, were not closely related to the true crinoids, instead, being more closely related to the blastoids.

Gogia radiata

Gogia is distinguished from sea lilies, and most other blastoids, in that the plate-covered body was shaped like a vase, or a bowling pin (with the pin part stuck into the substrate), and that the five ambulacra were split into pairs of coiled or straight, ribbon-like strands. Six specimens of Gogia are known from the Greater Phyllopod bed, where they comprise < 0.1% of the community.[5]

As a whole, the Eocrinoids are regarded as basal blastozoans very close to the ancestry of the entire subphylum.

References
  1. Redescribed in Harker, P.; Hutchinson, R. D. (1953). "A New Occurrence and Redescription of Gogia prolifica Walcott". Journal of Paleontology. 27 (2): 285–287. JSTOR 1300058.
  2. Robison, R. A. (1965). "Middle Cambrian Eocrinoids from Western North America". Journal of Paleontology. 39 (3): 355–364. JSTOR 1301709.
  3. Durham, J. W. (1978). "A Lower Cambrian Eocrinoid". Journal of Paleontology. 52 (1): 195–199. JSTOR 1303808.
  4. "Paleoecology of the Middle Cambrian Eocrinoid Echinoderm Gogia Spiralis: Possible Changes in Substrate Adaptations Through Ontogeny".
  5. Caron, Jean-Bernard; Jackson, Donald A. (October 2006). "Taphonomy of the Greater Phyllopod Bed community, Burgess Shale". PALAIOS. 21 (5): 451–65. doi:10.2110/palo.2003.P05-070R. JSTOR 20173022.


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