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Spathacalymene

Trilobita - Phacopida - Calymenidae

Taxonomy
Spathacalymene was named by Tillman (1960) [Sepkoski's age data: S Ldov-u S Ludl-l]. It is not extant. Its type is Calymene nasuta.

It was assigned to Calymeninae by Tillman (1960); to Calymenidae by Jell and Adrain (2002); and to Phacopida by Sepkoski (2002).

Synonymy list
YearName and author
1960Spathacalymene Tillman
2002Spathacalymene Jell and Adrain p. 446
2002Spathacalymene Sepkoski

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Ecdysozoa
Panarthropoda
phylumArthropodaLatreille 1829
RankNameAuthor
subphylumArtiopoda(Hou and Bergstrom)
classTrilobitaWalch 1771
orderPhacopidaSalter 1864
suborderCalymeninaSwinnerton 1915
familyCalymenidaeMilne-Edwards 1840
genusSpathacalymeneTillman 1960

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.

G. †Spathacalymene Tillman 1960
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Diagnosis
ReferenceDiagnosis
C. G. Tillman 1960Papillate calymenid trilobite characterized by great but variable development of U-shaped or spatulate process from anterior border, very deep preglabellar furrow, large rostrum with open V-shaped an- terior edge and unknown posterior edge, distinct flattening of tops of axial and pleural thoracic lobes, twelve (?) or thirteen thoracic segments, pygidium with five axial rings and four pleural furrows, the latter extend- ing only two-thirds of way to ventral edge of pleurae, very faint interpleural furrows on inner parts of pleurae only
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: actively mobilef
Life habit: nektobenthicf
Diet: carnivoref
Vision: well-developedf
Created: 2009-06-11 14:42:12
Modified: 2012-08-27 07:17:38
Source: f = family, c = class
References: Hendy 2009, Aberhan et al. 2004
Collections
No collection or age range data are available