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Xystocrania perforator

Trilobita - Phacopida - Cheiruridae

Taxonomy
Cheirurus perforator was named by Billings (1865). Its type specimen is GSC 684, a cephalon/head (cranidium), and it is a 3D body fossil.

It was recombined as Nieszkowskia perforator by Raymond (1925); it was recombined as Xystocrania perforator by Whittington (1965), Ross (1970).

Synonyms
  • Kawina unicornica was named by Hintze (1953) [Paratypes: 26506, 26508-11 (AMNH). Questionably assigned to genus by author.]. Its type specimen is 26507 (AMNH), an exoskeleton (cranidium), and it is a 3D body fossil.

    It was recombined as Xystocrania unicornica by Whittington (1965); it was synonymized subjectively with Xystocrania perforator by Tremblay and Westrop (1991).
Synonymy list
YearName and author
1865Cheirurus perforator Billings p. 287 fig. 275
1925Nieszkowskia perforator Raymond p. 146
1953Kawina unicornica Hintze p. 179 figs. Pl. 28, figs. 2a-c
1965Xystocrania unicornica Whittington p. 412
1965Xystocrania perforator Whittington p. 413
1970Xystocrania perforator Ross p. 89 figs. Plate 17, figures 3-7, 10

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—EcdysozoaAguinaldo et al. 1997
—Panarthropoda
phylumArthropodaLatreille 1829
RankNameAuthor
subphylumArtiopoda(Hou and Bergstrom)
classTrilobitaWalch 1771
orderPhacopidaSalter 1864
suborderCheirurinaHarrington and Leanza 1957
familyCheiruridaeHawle and Corda 1847
genusXystocrania
speciesperforator()

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.

†Xystocrania perforator Billings 1865
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Invalid names: Kawina unicornica Hintze 1953 [synonym]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
Composition: low Mg calcitec
Composition 2: chitinc
Entire body: yesf
Adult length: 10 to < 100f
Adult width: 10 to < 100f
Ontogeny: molting, addition of partsc
Environment: marinec
Locomotion: fast-movingc
Life habit: low-level epifaunalc
Diet: carnivoref
Created: 2009-06-11 14:43:11
Modified: 2012-08-27 07:38:08
Source: f = family, c = class
References: Aberhan et al. 2004, Hendy 2009

Age range: Rangerian or 471.30000 to 470.30000 Ma

Collections (11 total)


Time interval Ma Country or state Original ID and collection number
Rangerian471.3 - 470.3USA (Nevada) Xystocrania perforator (104448 104461)
Dapingian471.3 - 469.4USA (Utah) Kawina unicornica (104193)
Chazyan471.3 - 457.3Canada (Newfoundland and Labrador) Xystocrania perforator (235378)
Whiterockian471.3 - 457.3Canada (Northwest Territories) Xystocrania perforator (102232 102258 102259 102262 102265)
Whiterockian471.3 - 457.3Canada (Newfoundland and Labrador) Kawina perforator (104883 104884)