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Modocia

Trilobita - Ptychopariida - Marjumiidae

Taxonomy
Modocia was named by Walcott (1924) [Sepkoski's age data: Cm mMid-u Cm Dres-l Sepkoski's reference number: 80,379].

It was assigned to Corynexochidae by Resser (1936); to Ptychoparioidea by Palmer (1954); to Ptychopariida by Sepkoski (2002); and to Marjumiidae by Jell and Adrain (2002).

Synonyms
Synonymy list
YearName and author
1924Armonia Walcott
1924Modocia Walcott
1936Modocia Resser p. 25
1937Metisia Resser p. 19
1938Perioura Resser
1954Modocia Palmer p. 81
2002Modocia Jell and Adrain p. 408
2002Modocia Sepkoski
2002Perioura Sepkoski

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—EcdysozoaAguinaldo et al. 1997
—Panarthropoda
phylumArthropodaLatreille 1829
RankNameAuthor
subphylumArtiopoda(Hou and Bergstrom)
classTrilobitaWalch 1771
subclassLibristoma
orderPtychopariidaSwinnerton 1915
familyMarjumiidaeKobayashi 1935
genusModociaWalcott 1924

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. †Modocia Walcott 1924
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†Modocia arctica Walcott and Resser 1924
†Modocia comforti Robison and Babcock 2011
†Modocia integella Rozova 1964
†Modocia kohli Robison and Babcock 2011
†Modocia nevadensis Palmer 1954
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Invalid names: Ptychoparia oweni Meek and Hayden 1861 [replaced]
†Modocia obscura Zhang et al. 1980
†Modocia oweni Meek and Hayden 1861
†Modocia penfieldi Walcott 1899
†Modocia whiteleyi Robison and Babcock 2011
Invalid names: Armonia Walcott 1924 [synonym], Metisia Resser 1937 [synonym], Perioura Resser 1938 [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-movingc
Life habit: low-level epifaunalc
Diet: carnivorec
Vision: well-developedf
Created: 2009-02-26 11:57:32
Modified: 2009-02-26 13:57:32
Source: g = genus, f = family, c = class
References: Hendy 2009, Whittington et al. 1997, Aberhan et al. 2004

Age range: base of the St Davids to the top of the Tavgian or 506.50000 to 486.85000 Ma

Collections (74 total)


Time interval Ma Country or state Original ID and collection number
Cambrian538.8 - 486.85USA (Georgia) Armonia elongata (164675)
Duyunian - Taijangian514.5 - 504.5China (Guizhou) M. obscura (107157)
Middle Cambrian506.5 - 497.0USA (Utah) M. sp. (64520 86727 86740)
Middle Cambrian506.5 - 497.0USA (Alaska) M. compressa (64765)
St Davids506.5 - 497.0Canada (British Columbia) M. sp., M. brevispina (122017)
St Davids506.5 - 497.0USA (Idaho/ Utah) Pachyrhachis oweni (218)
St Davids506.5 - 497.0USA (Utah) M. sp. (216)
Mayan504.5 - 499.5Russian Federation (Gorniy Altay Republic) M. sp. (10175)
Menevian504.5 - 499.5USA (South Dakota) M. centralis (8237 8239 8242 8246 8271 8272 8274 8277 8279 8280) M. oweni (8247) M. oweni, M. centralis (8273 8275 8276)
Menevian504.5 - 499.5USA (Utah) M. sp. (10572)
Menevian504.5 - 499.5Greenland (Peary Land) M. planata (49452 49485)
Menevian504.5 - 499.5Canada (Yukon) M. dubia (9874)
Marjumian504.5 - 497.0USA (Wisconsin) Armonia sp. (230)
Marjumian504.5 - 497.0USA (Utah) M. brevispina (77272) M. brevispina, M. kohli (230682) M. comforti, M. whiteleyi (230681) M. laevinucha (261 56144 77271) M. sp. (260 262) M. typicalis (77207) M. typicalis, M. laevinucha, M. nuchaspina (230679) M. typicalis, M. sp. (77206) M. weeksensis (50592)
Marjumian504.5 - 497.0USA (Vermont) M. vermontensis (222)
Marjumian504.5 - 497.0Canada (British Columbia) M. sp., M. brevispina (122072)
Marjumian504.5 - 497.0Greenland (Peary Land) M. planata (49433 49434 49435 49449 49450 49453 49454 49481 49483)
Menevian - St Davids504.5 - 497.0USA (South Dakota) M. centralis (8193 8194 8195 8196) M. oweni (8198 8200)
Guzhangian500.5 - 497.0USA (Texas) M. centralis (208715 208770) M. oweni (208859 208860 208993 208995)
Dresbachian497.0 - 486.85USA (Wyoming) M. sp. (224 225 226 227)
Dresbachian497.0 - 486.85Canada (Yukon) M. dubia, M. sp. (55211) M. spinosa, M. sp. (55210)
Dresbachian497.0 - 486.85USA (South Dakota) M. sp. (223)
Merioneth497.0 - 486.85USA (Vermont) M. sp. (217)
Merioneth497.0 - 486.85USA (Pennsylvania) M. benorensis (77700)
Tavgian497.0 - 486.85Russian Federation (Krasnoyar) M. integella (131067)