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Morphology Ecology and taphonomy   Age range and collections

Halkieria

Aculifera - Halkieriidae

Synonyms
Synonymy list
YearName and author
1967Halkieria Poulsen
1981Dactyosachites He p. 88
1981Microsachites He p. 89
1984Acrosquama Qian and Xiao p. 72
1984Acuminachites Qian and Yin p. 105
1997Halkieria Conway Morris and Chapman p. 8
2002Halkieria Sepkoski, Jr.
2007Halkieria Conway Morris and Caron p. 1258
2010Halkieria Parkhaev and Demidenko p. 985

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
Schizocoela
RankNameAuthor
phylumMollusca
Sachitida(He 1980)
classAculiferaBlumrich 1891
familyHalkieriidae
subfamilyHalkieriinaePoulson 1967
genusHalkieria

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
P. Y. Parkhaev and Y. Demidenko 2010"Hollow elongated asymmetrical sclerites of three distinct morphotypes, i.e., palmate, cultrate, and siculate types. Each sclerite composed of distinct base and blade, which is several times longer than base. Base usually bent towards lower side of sclerite, forming variable angle with blade. Base usually bears foramen, which often repeat shape of cross-section of sclerite base. Sclerites bent to different extent. Upper surface of sclerite usually convex, bears longitudinal (rarely transversal) ribs and carinae, sometimes ornamented by tubercles. Lower surface flattened or concave, smooth or with transversal striation."