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Achatella

Trilobita - Phacopida - Pterygometopidae

Synonyms
Synonymy list
YearName and author
1935Achatella Delo
1993Achatella Jaanusson and Ramsköld
1993Achatella (Vironiaspis) Jaanusson and Ramsköld
2002Achatella Jell and Adrain p. 337
2002Achatella Sepkoski
2004Vironiaspis Roomusoks
2016Achatella Swisher et al. p. 62

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Ecdysozoa
Panarthropoda
phylumArthropodaLatreille 1829
subphylumArtiopoda(Hou and Bergstrom)
RankNameAuthor
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.

G. †Achatella Delo 1935
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Achatella achates Billings 1860
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Invalid names: Pterygometopus billingsi Wilson 1947 [synonym]
Achatella katharina Bradley 1930
Achatella kuckersianus Schmidt 1881
Achatella schmidti Warburg 1925
Achatella truncatocaudata Portlock 1843
Invalid names: Vironiaspis Jaanusson and Ramsköld 1993 [synonym]
Diagnosis
ReferenceDiagnosis
R. E. Swisher et al. 2016Cephalon relatively flat with a weak anterior arch [1(1)]. L3 lobe subtriangular with conspicuous adaxial taper [7(1)], and longer (exsag.) than L1 and L2 [8(1)]. Posterior branch of facial suture nearly straight [16(1)]. Pygidium elongate, subtriangular in outline.
Measurements
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
Comments: BODY SIZE: Data from Harrington et al. (1959).g
Created: 2009-06-10 09:12:29
Modified: 2009-06-10 11:12:29
Source: g = genus, f = family, subo = suborder, c = class
References: Hendy 2009, Aberhan et al. 2004, Fortey and Owens 1999

Age range: base of the Early/Lower Llandeilo to the top of the Ashgill or 466.00000 to 443.70000 Ma

Collections (37 total)


Time interval Ma Country or state Original ID and collection number
Middle Ordovician470.0 - 458.4USA (California) A. sp. (196137)
Early/Lower Llandeilo466.0 - 460.9China (Sichuan) A. sp. (7678)
Uhaku459.7 - 458.0Russian Federation A. kuckersiana (167734)
Caradoc458.4 - 449.5Canada (Ontario) A. billingsi (26274)
Caradoc458.4 - 449.5Ireland A. truncatocaudata (50599 50601)
Caradoc458.4 - 449.5United Kingdom (Scotland) A. consobrina (188938)
Kukruse458.0 - 456.8Russian Federation A. kuckersiana (160531)
Kukruse458.0 - 456.8Estonia (Ida-Viru) A. kuckersianus (168534)
Kukruse458.0 - 456.8Estonia (Kohtla-Nõmme) A. kuckersianus (168527)
Kirkfieldian457.3 - 449.6Canada (Ontario) A. sp., A. achates (26192)
Shermanian457.3 - 449.6Canada (Ontario) A. achates (26272)
Shermanian457.3 - 449.6USA (Illinois) Dalmanites katharina (154952)
Trentonian457.3 - 449.6USA (Missouri) Dalmanites katharina (89024)
Chatfieldian453.8 - 451.0Canada (Ontario) A. achates (26273 26277)
Chatfieldian453.8 - 451.0USA (New York) A. achates (181519 181522)
Katian - Hirnantian453.0 - 443.4Sweden (Dalarne) A. schmidti (73413)
Cheneyan452.5 - 451.3United Kingdom (Scotland) A. consobrina (169254)
Edenian451.0 - 450.2USA (Pennsylvania) Pterygometopus achates (34895)
Edenian451.0 - 450.2USA (Ohio) A. sp. (383)
Edenian451.0 - 450.2USA (Kentucky) A. sp. (74813 74818)
Edenian451.0 - 450.2Canada (Quebec) A. achates (163865)
Edenian - Richmondian451.0 - 445.5Canada (Quebec) A. clivosa (223275)
Maysvillian450.2 - 449.6USA (Ohio) A. sp. (387 388 391)
Maysvillian - Ashgill450.2 - 443.7USA (Ohio) A. sp. (389 390)
Richmondian449.6 - 445.5Canada (Quebec) A. clivosa (223276)
Richmondian - Gamachian449.6 - 443.7Canada (Quebec) A. sp. (37790)
Pusgillian - Cautleyan449.5 - 448.8United Kingdom (Northern Ireland) Phacops truncatocaudatus (171675)
Ashgill449.5 - 443.7Canada (Quebec) A. sp. (13131)
Hirnantian445.2 - 443.4United Kingdom (Scotland) A. truncatocaudata (181875 181876)