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Helmetiida

Artiopoda - Helmetiida

Taxonomy
Helmetiida was named by Novozhilov (1960).

It was assigned to Conciliterga by O'Flynn et al. (2024), Losso et al. (2025).

Synonymy list
YearName and author
1960Helmetiida Novozhilov
2024Helmetiida O'Flynn et al. p. 810
2025Helmetiida Losso et al. p. 4

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—EcdysozoaAguinaldo et al. 1997
—Panarthropoda
RankNameAuthor
phylumArthropodaLatreille 1829
classArtiopodaHou and Bergstrom
subclassConcilitergaHou and Bergström 1997
orderHelmetiidaNovozhilov 1960
orderHelmetiidaNovozhilov 1960

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.

Or. †Helmetiida Novozhilov 1960
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Fm. †Helmetiidae Simonetta and Delle Cave 1975
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G. †Haifengella Zhao 2014
G. †Kuamaia Hou 1987
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†Kuamaia lata Hou 1987
†Kuamaia muricata Hou and Bergström 1997
G. †Rhombicalvaria Hou 1987
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Invalid names: Tegopeltidae Simonetta and Delle Cave 1975 [empty]
Diagnosis
ReferenceDiagnosis
S. R. Losso et al. 2025Concilitergans with raised eye bulges on dorsal exoskeleton accommodating ventral stalked eyes. Large anterior sclerite located in central notch of anterior margin of cephalon with notch occupying less than a third of the anterior margin in most taxa (absent only in Tegopelte). Postantennal appendages are homonomous and biramous, including three pairs in the cephalon and one associated with each tergite in the thorax. Endopodites are gracile with slender and rect-
angular distal podomeres. Exopodites bear long, thick lamellae on a single lobe.
Measurements
No measurements are available
Locomotion: actively mobilep
Created: 2004-02-29 09:38:49
Modified: 2004-02-29 11:38:49
Source: p = phylum
Reference: Kiessling 2004

Age range: Atdabanian or 521.00000 to 516.00000 Ma

Collections (16 total)


Time interval Ma Country or state Original ID and collection number
Atdabanian521.0 - 516.0China (Yunnan) Kuamaia lata (68083 90149 90163 96405 96406 96407 96412) Kuamaia lata, Kuamaia muricata, Rhombicalvaria acantha (96402) Kuamaia lata, Rhombicalvaria acantha (90494) Kuamaia sp. (86929)
Nangaoian521.0 - 514.5China (Yunnan) Kuamaia lata (132329 132330 194141 194153 194155 194161)