''Zacanthoides'' is an
extinct
Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and ...
Cambrian
The Cambrian Period ( ; sometimes symbolized C with bar, Ꞓ) was the first geological period of the Paleozoic Era, and of the Phanerozoic Eon. The Cambrian lasted 53.4 million years from the end of the preceding Ediacaran Period 538.8 million ...
genus of
corynexochid trilobite. It was a nektobenthic
predatory
carnivore. Its remains have been found in Canada (
British Columbia, especially in the
Burgess Shale, and
Newfoundland
Newfoundland and Labrador (; french: Terre-Neuve-et-Labrador; frequently abbreviated as NL) is the easternmost province of Canada, in the country's Atlantic region. The province comprises the island of Newfoundland and the continental region ...
),
Greenland, Mexico, and the United States (
Alaska,
Nevada,
Utah,
Vermont, and
Idaho for which ''Z. idahoensis'' is named). Its major characteristics are a slender
exoskeleton with 9
thoracic segments, pleurae with long spines, additional spines on the axial rings, and a
pygidium that is considerably smaller than its
cephalon
Cephalon, Inc. was an American biopharmaceutical company co-founded in 1987 by pharmacologist Frank Baldino, Jr., neuroscientist Michael Lewis, and organic chemist James C. Kauer—all three former scientists with the DuPont Company. Baldino s ...
.
Species
*''Z. idahoensis''
*''Z. kelsayae''
*''Z. romingeri'' (
type species)
*''Z. holopygus'' (unrecognized)
*''Z. gilberti'' (unrecognized)
Synonyms
''Embolimus'' is a synonym.
[Sepkoski, J.J. Jr. 2002. A compendium of fossil marine animal genera. D.J. Jablonski & M.L. Foote (eds.). ''Bulletins of American Paleontology'' 363: 1–560]
Sepkoski's Online Genus Database
/ref>
References
External links
*
Corynexochida genera
Corynexochina
Cambrian trilobites
Burgess Shale animals
Fossil taxa described in 1888
Wheeler Shale
Paleozoic life of Newfoundland and Labrador
Cambrian genus extinctions
{{Corynexochida-stub