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Helmetia was named by Walcott (1918) [Sepkoski's age data: Cm mMid-u]. It is not extant.

It was assigned to Arthropoda by Briggs et al. (1994); to Merostomoidea by Sepkoski (2002); and to Conciliterga by Paterson et al. (2012) and Lerosey-Aubril et al. (2017).

Species lacking formal opinion data

Synonymy list
YearName and author
1918Helmetia Walcott
1994Helmetia Briggs et al. p. 220
2002Helmetia Sepkoski
2012Helmetia Paterson et al.
2017Helmetia Lerosey-Aubril et al. p. 8 fig. 6

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EubilateriaAx 1987
phylumArthropodaLatreille 1829
subphylumArtiopoda(Hou and Bergstrom)
subclassConcilitergaHou and Bergström 1997
genusHelmetiaWalcott 1918

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.

G. †Helmetia Walcott 1918
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No diagnoses are available
No measurements are available
Composition: chiting
Locomotion: actively mobileg
Life habit: nektobenthicg
Diet: carnivoreg
Vision: well-developedg
Created: 2009-04-21 12:33:54
Modified: 2010-08-23 04:27:20
Source: g = genus
Reference: Hendy et al. 2009

Age range: base of the Solvan to the top of the Delamaran or 510.20000 to 506.50000 Ma

Collections (2 total)

Time interval Ma Country or state Original ID and collection number
Delamaran511.2 - 506.5Canada (British Columbia) H. expansa (84428)
Solvan - Menevian510.2 - 499.5Czech Republic H. fastigata (57206)