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Symphysurina walcotti

Artiopoda - Asaphida - Nileidae

Taxonomy
Symphysurina walcotti was named by Kindle (1929). Its type specimen is GSC 9378, a pygidium, and it is a 3D body fossil.

Sister species lacking formal opinion data
S. cleora, S. convexa, S. eugenia, S. eurekensis, S. illaenoides, S. oriens

Synonyms
Synonymy list
YearName and author
1929Symphysurina walcotti Kindle p. 146 figs. Pl. 1, fig. 18
1953Symphysurina brevispicata Hintze p. 236 figs. Pl 3, fig. 17

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—EcdysozoaAguinaldo et al. 1997
—Panarthropoda
phylumArthropodaGravenhorst 1843
classArtiopodaHou and Bergstrom
RankNameAuthor
classTrilobitaWalch 1771
subclassLibristoma
orderAsaphidaSalter 1864
superfamilyCyclopygoideaRaymond 1925
familyNileidaeAngelin 1854
genusSymphysurinaUlrich 1924
specieswalcottiKindle 1929

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.

†Symphysurina walcotti Kindle 1929
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Invalid names: Symphysurina brevispicata Hintze 1953 [synonym]
Diagnosis
No diagnoses are available
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-movingo
Life habit: low-level epifaunalo
Diet: carnivorec
Vision: well-developedf
Created: 2009-06-08 12:34:07
Modified: 2009-06-08 14:34:07
Source: g = genus, f = family, o = order, c = class
References: Hendy et al. 2009, Aberhan et al. 2004, Hendy 2009

Age range: Skullrockian or 488.90000 to 483.40000 Ma

Collections (30 total)


Time interval Ma Country or state Original ID and collection number
Trempealeauan490.2 - 486.85USA (Utah) Symphysurina brevispicata (219670 219671)
Trempealeauan490.2 - 486.85USA (Texas) Symphysurina brevispicata (215998 215999 216000 216001 216002 216003 216005 216007)
Skullrockian488.9 - 483.4USA (Utah) Symphysurina brevispicata (104153 104161 106420)
Skullrockian488.9 - 483.4USA (Texas) Symphysurina brevispicata (219672 219673 219674)
Gasconadian486.85 - 477.1USA (Oklahoma) Symphysurina brevispicata (221096)
Tremadocian486.85 - 477.1USA (Nevada) Symphysurina brevispicata (75444)
Tremadocian486.85 - 477.1Canada (Newfoundland and Labrador) Symphysurina brevispicata (105854 105867)
Tremadocian486.85 - 477.1USA (Utah) Symphysurina brevispicata (219669)
Tremadoc486.4 - 477.1Canada (Alberta) Symphysurina walcotti (11033 11036 11038 11039 11040 11044 11045 11047 11048)