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Echidnina

Radiolaria - Archaeospicularia - Echidninidae

Taxonomy
Echidnina was named by Bengtson (1986) [Sepkoski's age data: Cm Dres-l]. Its type is Echidnina runnegari. It is the type genus of Echidninidae.

It was assigned to Hexactinellida by Sepkoski (2002); and to Echidninidae by Kozur et al. (1996), De Wever et al. (2001), Won and Iams (2002) and Noble et al. (2017).

Synonymy list
YearName and author
1986Echidnina Bengtson
1996Echidnina Kozur et al. p. 248
2001Echidnina De Wever et al. p. 87
2002Echidnina Sepkoski, Jr.
2002Echidnina Won and Iams p. 24
2017Echidnina Noble et al. p. 433

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RankNameAuthor
Eukaryota()
Rhizaria
Retaria
classRadiolariaMüller 1858
RankNameAuthor
superorderPolycystina(Ehrenberg 1867)
orderArchaeospiculariaDumitrica et al. 2000
familyEchidninidae
genusEchidninaBengtson 1986

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
M.-Z. Won and W. J. Iams 2002Individual spicules interlocked or fused, with or without losing their original spicular structure and forming generally an irregular to spherical hollow shell; spicules consisting of one(?), four, to ten rays. Commonly rays consisting of two vertical and more than four whorled rays. Rays arranged or fused so that no ray tip directed toward the center of the shell.