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Hyboclypus

Echinoidea -

Taxonomy
Hyboclypus was named by Agassiz (1839) [Sepkoski's age data: J Aale J Kimm].

It was assigned to Galeropygidae by Kier (1966); to Disasteroida by Sepkoski (2002); to Atelostomata by Barras (2007); and to Microstomata by Kroh and Smith (2010).

Synonymy list
YearName and author
1839Hyboclypus Agassiz p. 75
1966Hyboclypus Kier p. U499
2002Hyboclypus Sepkoski, Jr.
2007Hyboclypus Barras p. 152
2010Hyboclypus Kroh and Smith p. 171

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
Ambulacraria
phylumEchinodermata
subphylumEchinozoa
RankNameAuthor
classEchinoidea()
subclassEuechinoideaBronn 1860
infraclassAcroechinoidea()
Carinacea
Irregularia()
Microstomata
genusHyboclypus

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 2007Stem group Atelostomata with an adjunct apical disc. The disc contains no more than six complemental plates and oculars II and IValways share a direct contact. The genus retains the primitive characters of a vertically sided periproctal groove (Pl. 1, fig. 4a), oral pore pairs crowded into phyllodes (Fig. 10B) and a peristomial well (Pl. 1, fig. 4c).