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Tithonia

Echinoidea - Tithoniidae

Taxonomy
Tithonia was named by Pomel (1883) [Sepkoski's age data: J Bath K Vala Sepkoski's reference number: 956]. It is the type genus of Tithoniidae.

It was assigned to Disasteridae by Wagner and Durham (1966); to Disasteroida by Sepkoski (2002); and to Tithoniidae by Barras (2007).

Synonymy list
YearName and author
1883Tithonia Pomel p. 49
1966Tithonia Wagner and Durham p. U528
2002Tithonia Sepkoski, Jr.
2007Tithonia Barras p. 154

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
Ambulacraria
phylumEchinodermata
subphylumEchinozoa
classEchinoidea()
RankNameAuthor
subclassEuechinoideaBronn 1860
infraclassAcroechinoidea()
Carinacea
Irregularia()
Atelostomata
familyTithoniidae
genusTithonia

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
C. G. Barras 2007Tithoniids with an endocyclic apical disc (cf. Jesionek Szymanska 1963: text-pl. 13, fig. 9). The peristome is angled to face towards the anterior. Plastron plating is amphisternous (Fig. 12B). The pore pairs are microscopic.