PBDB Taxon

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Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Euptychaspis

Trilobita - Asaphida - Ptychaspididae

Taxonomy

Euptychaspis was named by Ulrich (1931) [Sepkoski's age data: Cm Trep-l O Trem-l Sepkoski's reference number: 379,697]. It is not extant.

It was assigned to Asaphida by Sepkoski (2002); and to Ptychaspididae by Jell and Adrain (2002).

Species

E. dougali, E. jugalis, E. kirki, E. lawsonensis, E. typicalis

Synonymy list

Year	Name and author
1931	Euptychaspis Ulrich
2002	Euptychaspis Jell and Adrain p. 375
2002	Euptychaspis Sepkoski

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Protostomia
—	Ecdysozoa	Aguinaldo et al. 1997
—	Panarthropoda
phylum	Arthropoda	Latreille 1829

Rank	Name	Author
subphylum	Artiopoda	(Hou and Bergstrom)
class	Trilobita	Walch 1771
subclass	Libristoma
order	Asaphida	Salter 1864
superfamily	Dikelocephaloidea	(Miller 1889)
family	Ptychaspididae	Raymond 1924
genus	Euptychaspis	Ulrich 1931

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. †Euptychaspis Ulrich 1931

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†Euptychaspis dougali Adrain and Westrop 2004

†Euptychaspis jugalis Winston and Nicholls 1967

†Euptychaspis kirki Kobayashi 1935

†Euptychaspis lawsonensis Adrain and Westrop 2005

†Euptychaspis typicalis Ulrich et al. 1931

Diagnosis

No diagnoses are available

Measurements

No measurements are available

Composition:

low Mg calcitec

Composition 2:

chitinc

Entire body:

yesg

Adult length:

1.0 to < 10g

Adult width:

1.0 to < 10g

Spines:

minorg

Ontogeny:

molting, addition of partsc

Environment:

marinec

Locomotion:

fast-movingo

Life habit:

low-level epifaunalo

Diet:

carnivorec

Vision:

well-developedf

Comments:

BODY SIZE: Data from Harrington et al. (1959).g

Created:

2009-06-09 09:39:28

Modified:

2009-06-09 11:39:28

Source: g = genus, f = family, o = order, c = class

References: Hendy et al. 2009, Aberhan et al. 2004, Whittington et al. 1997, Hendy 2009

Age range: Trempealeauan or 490.20000 to 486.85000 Ma

Collections (59 total)

Time interval	Ma	Country or state	Original ID and collection number
Sunwaptan	493.5 - 488.9	USA (New Mexico)	E. kirki (203887)
Sunwaptan	493.5 - 488.9	USA (Oklahoma)	E. jugalis (240449 240452 240454) E. kirki (240393 240395 240396 240399 240402 240403 240412 240413 240415 240416 240419 240441 240448) E. kirki, E. jugalis (240440 240443 240445) E. typicalis (240418 240451 240458 240459 240465 240470) E. typicalis, E. jugalis (240444)
Sunwaptan	493.5 - 488.9	USA (New York)	E. sp. indet. (85187) E. typicalis (257 85185 85186)
Sunwaptan	493.5 - 488.9	USA (Nevada)	E. dougali (235995) E. lawsonensis (236000) E. sp. (8975)
Sunwaptan	493.5 - 488.9	Canada (Alberta)	E. sp. (81301) E. typicalis (54094 81297)
Sunwaptan	493.5 - 488.9	USA (Texas)	E. kirki (185210)
Sunwaptan	493.5 - 488.9	USA (Utah)	E. lawsonensis (235998 235999) E. sp., E. lawsonensis (235997)
Trempealeauan	490.2 - 486.85	USA (Utah)	E. sp. (259)
Trempealeauan	490.2 - 486.85	USA (Texas)	E. jugalis (219678) E. kirki (216014 216015 219648 219651 219652 219653 219654 219655 233747) E. typicalis (219679)
Trempealeauan	490.2 - 486.85	Canada (Yukon)	E. kirki (55313)
Trempealeauan	490.2 - 486.85	USA (Nevada)	Euptychaspis indet. (50831) E. kirki (233789) E. sp. (203998 204002)
Skullrockian	488.9 - 483.4	USA (Texas)	E. typicalis (219680)