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Kewia marquamensis

Echinoidea - Clypeasteroida - Echinarachniidae

Taxonomy
Kewia marquamensis was named by Linder et al. (1988). Its type specimen is UCMP 38207, a test, and it is a 3D body fossil. Its type locality is UCMP loc. 10568, Wilhoit [Marquam Mbr, Scotts Mills Fm], which is in an Oligocene marine sandstone in the Scotts Mills Formation of Oregon.

Sister species lacking formal opinion data

View classification of included taxa

Synonymy list
YearName and author
1988Kewia marquamensis Linder et al. p. 953 figs. figs. 5.1-5.8

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
Ambulacraria
phylumEchinodermata
subphylumEchinozoa
classEchinoidea()
subclassEuechinoideaBronn 1860
superorderAcroechinoidea()
RankNameAuthor
Carinacea
Irregularia()
Microstomata
Neognathostomata
orderClypeasteroida
suborderScutellina()
infraorderScutelliformes
familyEchinarachniidae
genusKewiaNisiyama 1935
speciesmarquamensis

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

Diagnosis
ReferenceDiagnosis
R. A. Linder et al. 1988Test very small with subpentagonal outline; width greater than length; both peristome and apical system anteriorly eccentric about 7 percent; periproct supramarginal, situated above ambitus about 2-3 periproct diameters, between third and fourth pair of coronal plates; anterior petal open, inflated distally, distinctly flared; anterior paired petals subparallel, pos- terior paired petals narrowly parallel; bivium angle 62?; smallest adult size observed 5.6 mm (anterior-posterior) with four gono- pores; largest specimen about 14 mm.