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Lloydia (Evansaspis) formosa

Trilobita - Corynexochida - Leiostegiidae

Taxonomy
Leiostegium formosa was named by Hintze (1953) [Paratypes: 26191-2 (AMNH).]. Its type specimen is 26193 (AMNH), a pygidium, and it is a 3D body fossil.

It was recombined as Lloydia (Evansaspis) formosa by Lochman (1966).

Sister species lacking formal opinion data
L. saffordi

Synonymy list
YearName and author
1953Leiostegium formosa Hintze p. 189 figs. Pl. 8, figs. 9a-c
1966Lloydia (Evansaspis) formosa Lochman p. 533 figs. pl. 65 f. 39

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—EcdysozoaAguinaldo et al. 1997
—Panarthropoda
phylumArthropodaLatreille 1829
subphylumArtiopoda(Hou and Bergstrom)
RankNameAuthor
classTrilobitaWalch 1771
orderCorynexochida
suborderLeiostegiinaBradley 1925
superfamilyLeiostegioideaBradley 1925
familyLeiostegiidaeBradley 1925
genusLloydiaVogdes 1893
subgenusEvansaspis(Kobayashi 1955)
speciesformosa()

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.

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Diagnosis
No diagnoses are available
Measurements
No measurements are available
Composition: low Mg calcitec
Composition 2: chitinc
Ontogeny: molting, addition of partsc
Environment: marinec
Locomotion: actively mobileo
Life habit: nektobenthico
Diet: carnivoreo
Vision: well-developedf
Created: 2009-12-14 06:30:50
Modified: 2009-12-14 08:30:50
Source: f = family, o = order, c = class
References: Hendy et al. 2009, Whittington et al. 1997, Aberhan et al. 2004

Age range: base of the Stairsian to the top of the Tulean or 483.40000 to 475.30000 Ma

Collections (5 total)


Time interval Ma Country or state Original ID and collection number
Stairsian483.4 - 481.7USA (North Dakota) Lloydia formosa (414 119478)
Tulean481.7 - 475.3USA (Utah) Leiostegium formosa (104075 104077 104080)