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Amecephalus arrojosensis

Trilobita - Ptychopariida - Alokistocaridae

Taxonomy
Strotocephalus arrojosensis was named by Lochman (1952). Its type specimen is U.S.N.M. No.115753, a cephalon/head (Cranidium), and it is a 3D body fossil.

It was recombined as Amecephalus arrojosensis by Sundberg and McCollum (2000) and Sundberg and McCollum (2003).

Synonymy list
YearName and author
1952Strotocephalus arrojosensis Lochman pp. 157 - 158 figs. pl. 21, figs. 29 –34
2000Amecephalus arrojosensis Sundberg and McCollum p. 607 figs. Figure 5.1–5.13
2003Amecephalus arrojosensis Sundberg and McCollum p. 966 figs. Plate 3, ®gure 12

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Ecdysozoa
—Panarthropoda
phylumArthropodaLatreille 1829
RankNameAuthor
subphylumArtiopoda(Hou and Bergstrom)
classTrilobitaWalch 1771
subclassLibristoma
orderPtychopariidaSwinnerton 1915
familyAlokistocaridaeResser 1939
genusAmecephalusWalcott 1924
speciesarrojosensis()

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.

†Amecephalus arrojosensis Lochman 1952
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Diagnosis
ReferenceDiagnosis
F. A. Sundberg and L. B. McCollum 2000Cranidium with frontal area subequally divided (anterior border 60
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
Ontogeny: molting, addition of partsc
Environment: marinec
Locomotion: fast-movingc
Life habit: low-level epifaunalc
Diet: carnivorec
Vision: well-developedf
Created: 2009-06-02 14:42:12
Modified: 2009-06-02 16:42:12
Source: g = genus, f = family, c = class
References: Aberhan et al. 2004, Hendy 2009

Age range: base of the St Davids to the top of the Delamaran or 509.00000 to 506.50000 Ma

Collections (34 total)


Time interval Ma Country or state Original ID and collection number
Cambrian538.8 - 485.4Argentina (San Juan) Amecephalus arrojosensis (200106)
Delamaran511.2 - 506.5USA (Nevada) Amecephalus arrojosensis (10587 69280 69401 69403 69404 69432 69437 69447 69456)
Delamaran511.2 - 506.5USA (California) Amecephalus arrojosensis (69497 69498 69499 69500 69504 69506 69510 69512)
Delamaran - Menevian511.2 - 499.5Mexico Amecephalus arrojosensis (10687)
Solvan510.2 - 504.5USA (Nevada) Amecephalus arrojosensis (9218 9234 9241 9250 9251 9261)
St Davids509.0 - 497.0USA (Nevada) Amecephalus arrojosensis (50093 50109 50114 50295 50296 50329 50331 50332 50339)