Basic info Taxonomic history Classification Relationships
Morphology Ecology and taphonomy   Age range and collections

Geocoma

Ophiuroidea - Ophiurida - Aplocomidae

Synonymy list
YearName and author
1850Geocoma d'Orbigny p. 381
1966Geocoma Spencer and Wright p. U95
2002Geocoma Sepkoski, Jr.
2008Geocoma Hess and Meyer pp. 30, 32, 35

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
Ambulacraria
phylumEchinodermata
subphylumAsterozoa
RankNameAuthor
classOphiuroidea
orderOphiurida()
infraorderChilophiurina
familyAplocomidae
subfamilyAplocominae
genusGeocoma

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
H. Hess and C. A. Meyer 2008Adoral shields in contact; teeth weak, conical; six oral papillae, proximally two conical papillae, distally four leaf-like papillae; arms dorsally slightly keeled; lateral arm plates flat, moderately striated; 4-6 arm spines, length barely reaching that of arm segment; genital plate bar-like.