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Borealaspis biformis

Trilobita - Phacopida - Cheiruridae

Taxonomy
Borealaspis biformis was named by Ludvigsen (1976) [Paratypes: GSC 44231-44235, 44238. Hypotypes: GSC 44236, 44237 (Ludvigsen, 1979)]. Its type specimen is GSC 44230, a cephalon/head (cranidium), and it is a 3D body fossil. Its type locality is Whittaker Formation, Funeral Range, Mackenzie Mountains (C-570), which is in a Rocklandian/Shermanian carbonate limestone in the Whittaker Formation of Canada.

Synonymy list
YearName and author
1976Borealaspis biformis Ludvigsen p. 957 figs. Pl. 2, figs. 8, 9

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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
genusBorealaspisLudvigson 1976
speciesbiformis

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.

†Borealaspis biformis Ludvigsen 1976
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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: Edenian or 451.00000 to 450.20000 Ma

Collections (11 total)


Time interval Ma Country or state Original ID and collection number
Rocklandian - Edenian457.3 - 450.2Canada (Northwest Territories) Borealaspis biformis (25174 25175)
Shermanian - Edenian457.3 - 450.2Canada (Northwest Territories) Borealaspis biformis (24637)
Rocklandian - Kirkfieldian457.3 - 449.6Canada (Northwest Territories) Borealaspis biformis (24635)
Rocklandian - Shermanian457.3 - 449.6Canada (Northwest Territories) Borealaspis biformis (type locality: 25176)
Wildernessian457.3 - 449.6Canada (Northwest Territories) Borealaspis biformis (25860 102246 102247 102249 102250)
Edenian451.0 - 450.2Canada (Northwest Territories) Borealaspis biformis (24636)