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Platycystites

Paracrinoidea - Platycystitida - Platycystitidae

Taxonomy
Platycystites was named by Miller (1889) [Sepkoski's age data: O Llde-u O Cara-l Sepkoski's reference number: 2,332].

It was assigned to Platycystitinae by Frest et al. (1979); and to Platycystitida by Sepkoski (2002).

Synonymy list
YearName and author
1889Platycystites Miller
1979Platycystites Frest et al. pp. 387 - 388
2002Platycystites Sepkoski, Jr.

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
Ambulacraria
phylumEchinodermata
RankNameAuthor
subphylumParacrinozoaParsley and Mintz 1975
classParacrinoideaRegnell 1945
orderPlatycystitida
familyPlatycystitidaeParsley and Mintz 1975
subfamilyPlatycystitinaeParsley and Mintz 1975
genusPlatycystitesMiller 1889

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
T. J. Frest et al. 1979Theca amygdaloidal, compressed to broadly oval in outline, both arms reaching column, calluses prominent; 26 to 29 thecal plates; no intercalates. Peristome only slightly offset to left, periproct on posterior face near upper margin (adopted from Parsley & Mintz, 1975, p. 59).