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Gracilithecidae

Orthothecida - Gracilithecidae

Taxonomy
Gracilithecidae was named by Syssoiev (1972). Its type is Gracilitheca.

It was assigned to Orthothecida by Malinky and Skovsted (2004).

Synonymy list
YearName and author
1972Gracilithecidae Syssoiev
2004Gracilithecidae Malinky and Skovsted p. 565

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Eutriploblastica
Neotriploblastica
Eucoelomata
superphylumLophotrochozoa
RankNameAuthor
Lophophorata
phylumHyolitha
orderOrthothecida
familyGracilithecidae
familyGracilithecidae

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
J. M. Malinky and C.B. Skovsted 2004Orthothecid hyolith with shallow ventral furrow, grading into blunt lateral edges that extend to form a distinct protrusion along the entire length of the lateral edges of the conch (emended from Syssoiev 1968: 39).