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Achatella achates

Trilobita - Phacopida - Pterygometopidae

Dalmanites achates was named by Billings (1860).

It was recombined as Pterygometopus achates by Foerste (1919); it was recombined as Achatella achates by Jaanusson and Ramsköld (1993) and Swisher et al. (2016).

Sister species lacking formal opinion data

Synonymy list
YearName and author
1860Dalmanites achates Billings p. 63 fig. 9
1919Pterygometopus achates Foerste p. 397 figs. pl. 19, fig. 8
1947Pterygometopus billingsi Wilson p. 55 figs. pl. 10, figs. 4a-b
1993Achatella achates Jaanusson and Ramsköld
2016Achatella achates Swisher et al. pp. 65 - 73 fig. 3–5

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EubilateriaAx 1987
phylumArthropodaLatreille 1829
subphylumArtiopoda(Hou and Bergstrom)
classTrilobitaWalch 1771
orderPhacopidaSalter 1864
suborderPhacopinaStruve 1959
superfamilyPhacopoideaHupe 1953
familyPterygometopidaeReed 1905
subfamilyPterygometopinaeReed 1905
genusAchatellaDelo 1935

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.

Achatella achates Billings 1860
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Invalid names: Pterygometopus billingsi Wilson 1947 [synonym]
No diagnoses are available
No measurements are available
Composition: low Mg calcitec
Composition 2: chitinc
Entire body: yesg
Adult length: 10 to < 100g
Adult width: 10 to < 100g
Spines: minorg
Ontogeny: molting, addition of partsc
Environment: marinec
Locomotion: fast-movingc
Life habit: low-level epifaunalc
Diet: carnivoresubo
Vision: well-developedf
Created: 2009-06-10 09:12:29
Modified: 2009-06-10 11:12:29
Source: g = genus, f = family, subo = suborder, c = class
References: Fortey and Owens 1999, Aberhan et al. 2004, Hendy 2009

Age range: base of the Chatfieldian to the top of the Edenian or 453.80000 to 450.20000 Ma

Collections (8 total)

Time interval Ma Country or state Original ID and collection number
Kirkfieldian457.3 - 449.6Canada (Ontario) Achatella achates (26192)
Shermanian457.3 - 449.6Canada (Ontario) Achatella achates (26272)
Chatfieldian453.8 - 451.0USA (New York) Achatella achates (181519 181522)
Chatfieldian453.8 - 451.0Canada (Ontario) Achatella achates (26273 26277)
Edenian451.0 - 450.2Canada (Quebec) Achatella achates (163865)
Edenian451.0 - 450.2USA (Pennsylvania) Pterygometopus achates (34895)