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Ptychaspis

Artiopoda - Asaphida - Ptychaspididae

Taxonomy
Ptychaspis was named by Hall (1863) [Sepkoski's age data: Cm Fran-l Cm Fran-u Sepkoski's reference number: 16,464].

It was reranked as Conocephalites (Ptychaspis) by Whitfield (1880).

It was assigned to Conocephalites by Whitfield (1880); to Ptychaspididae by Jell and Adrain (2002); and to Asaphida by Sepkoski (2002).

Synonyms
Synonymy list
YearName and author
1863Ptychaspis Hall
1880Conocephalites (Ptychaspis) Whitfield
1933Asioptychaspis Kobayashi
2002Ptychaspis Jell and Adrain p. 436
2002Ptychaspis Sepkoski

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—EcdysozoaAguinaldo et al. 1997
—Panarthropoda
phylumArthropodaGravenhorst 1843
RankNameAuthor
classArtiopodaHou and Bergstrom
classTrilobitaWalch 1771
subclassLibristoma
orderAsaphidaSalter 1864
superfamilyDikelocephaloidea(Miller 1889)
familyPtychaspididaeRaymond 1924
genusPtychaspisHall 1863

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. †Ptychaspis Hall 1863
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†Ptychaspis granulosa Owen 1852
†Ptychaspis minuta Whitfield 1878
†Ptychaspis pustulosa Hall and Whitfield 1877
†Ptychaspis tuberosa Feniak 1952
Invalid names: Asioptychaspis Kobayashi 1933 [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
Ribbing: noneg
Spines: noneg
Ontogeny: molting, addition of partsc
Environment: marinec
Locomotion: fast-movingo
Life habit: low-level epifaunalo
Diet: carnivorec
Vision: well-developedf
Created: 2009-02-26 12:07:41
Modified: 2009-02-26 14:07:41
Source: g = genus, f = family, o = order, c = class
References: Whittington et al. 1997, Hendy et al. 2009, Hendy 2009, Aberhan et al. 2004

Age range: base of the Trempealeauan to the top of the Sunwaptan or 490.20000 to 488.90000 Ma

Collections (55 total)


Time interval Ma Country or state Original ID and collection number
Cambrian538.8 - 486.85USA (Wisconsin) P. sp. (250)
Franconian497.0 - 486.85USA (Montana) P. granulosa (247 131319 240232)
Franconian497.0 - 486.85USA (Wyoming) P. tuberosa, P. striata (238626)
Franconian497.0 - 486.85USA (Minnesota) P. granulosa (62099 62100 62101 62102 62103 62104 62105 62106 62109) P. miniscaensis (62112 62114 62116 62121 62123 62124) P. striata (62111) P. striata, P. granulosa, P. tuberosa (62107 62108 62110) P. striata, P. miniscaensis (62115 62117 62118 62119 62120 62122)
Franconian497.0 - 486.85USA (Idaho) P. sp. (251)
Franconian497.0 - 486.85USA (South Dakota) P. bullasa (9739) P. miniscaensis (9734 9745 9747 9748 9751) P. sp. (9740 9741 9743 9749)
Furongian497.0 - 486.85South Korea Asioptychaspis subglobosa (232034 232035)
Taoyuanian495.2 - 486.85China (Hebei) P. subglobosa (129604 129616)
Sunwaptan493.5 - 488.9Canada (Alberta) P. bullasa, P. striata (54088) P. bullasa, P. striata, P. sp., P. miniscaensis (64687) P. miniscaensis (54090 81296 81306) P. sp. (54092) P. sp., P. monsensis (54091)
Sunwaptan493.5 - 488.9USA (Oklahoma) P. sp. undet. (240488)
Trempealeauan490.2 - 486.85USA (New York) P. speciosus (74540 74541)