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Thecostraca Gruvel 1905

Body symmetry

Namigai et al 2014
bilaterally symmetric
URI: http://purl.obolibrary.org/obo/PATO_0001324

Definition: being symmetric about a plane running from frontal end to caudal end (head to tail), and having nearly identical right and left halves

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cellularity

Cellularity and growth form
multicellular
URI: http://purl.obolibrary.org/obo/PATO_0001993

Definition: A cellularity quality inhering in a bearer by virtue of the bearers consisting of more than one cell. [ PATOC:GVG ]

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described accepted species

Appeltans et al

1400

extinction status

Paleobiology Database
extant
URI: http://eol.org/schema/terms/extant

Definition: This taxon is still in existence, as opposed to extinct.

Attribution: http://en.wikipedia.org/wiki/Extant_taxon

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first appearance

Paleobiology Database
guzhangian age
URI: http://resource.geosciml.org/classifier/ics/ischart/Guzhangian

Attribution: International Chronostratigraphic Chart: http://www.stratigraphy.org/index.php/ics-chart-timescale

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Paleobiology Database

500.5 million years ago

(max)

last appearance

Paleobiology Database
cenozoic era
URI: http://resource.geosciml.org/classifier/ics/ischart/Cenozoic

Attribution: International Chronostratigraphic Chart: http://www.stratigraphy.org/index.php/ics-chart-timescale

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number of fossil occurrences

Paleobiology Database

1701

percent of marine species currently described

Appeltans et al

93

(max)
Appeltans et al

88

(min)

percent synonyms among marine species

Appeltans et al

7

total unknown marine species

Appeltans et al

200

(max)
Appeltans et al

100

(min)

undiscovered marine morphospecies

Appeltans et al

200

(max)
Appeltans et al

100

(min)