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Ptychagnostus

Agnostida - Ptychagnostidae

Synonyms
Synonymy list
YearName and author
1909Ptychagnostus Jaekel
1935Agnostus (Ptychagnostus) Kobayashi
1951Canotagnostus Rusconi
1954Ptychagnostus Palmer p. 60
1979Zeteagnostus Opik
1979Triplagnostus (Aristarius) Öpik p. 125
1996Ptychagnostus Westrop et al. p. 816
1997Ptychagnostus Whittington et al. p. 350
2002Ptychagnostus Sepkoski
2002Zeteagnostus Sepkoski
2008Zeteagnostus Ergaliev and Ergaliev

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Ecdysozoa
—Panarthropoda
phylumArthropodaLatreille 1829
RankNameAuthor
subphylumArtiopoda(Hou and Bergstrom)
orderAgnostidaSalter 1864
suborderAgnostinaSalter 1864
superfamilyCondylopygoideaRaymond 1913
familyPtychagnostidaeKobayashi 1939
genusPtychagnostusJaekel 1909

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. †Ptychagnostus Jaekel 1909
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Subg. †Ptychagnostus (Acidusus) Opik 1979
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Subg. †Ptychagnostus (Ptychagnostus) Jaekel 1909
†Ptychagnostus affinis Brøgger 1878
†Ptychagnostus akanthodes Robison 1964
†Ptychagnostus aksayensis Ergaliev and Ergaliev 2008
†Ptychagnostus atavus Tullberg 1880
†Ptychagnostus convexus Westergard 1946
†Ptychagnostus cuyanus Rusconi 1948
†Ptychagnostus intermedius Tullberg 1880
†Ptychagnostus karatauensis Ergaliev 1980
†Ptychagnostus punctuosus Angelin 1851
†Ptychagnostus seminula Whitehouse 1939
†Ptychagnostus spinosus Ergaliev 1980
Invalid names: Aristarius Öpik 1979 [synonym], Canotagnostus Rusconi 1951 [synonym], Zeteagnostus Opik 1979 [synonym]
Diagnosis
ReferenceDiagnosis
A. R. Palmer 1954Cephalon with glabella bilobed, tapered forward; median longitudinal preglabellar furrow pres- ent; basal glabellar lobes simple or divided. Pygidium with axial lobe usually bluntly pointed posteriorly; anterior third separated from posterior portion and subequally divided by distinct transverse furrows; margin usually without posterolateral spines.
Measurements
No measurements are available
Entire body: yesg
Adult length: 1.0 to < 10g
Adult width: 1.0 to < 10g
Spines: noneg
Locomotion: actively mobileg
Life habit: nektonicg
Diet: suspension feederg
Vision: blindf
Comments: LIFE HISTORY: Pelagic, fully motile slow, suspension-feeder according to Bambach et al (2007).g
Created: 2009-02-25 10:09:12
Modified: 2009-09-21 22:37:40
Source: g = genus, f = family
Reference: Hendy 2009

Age range: base of the Solvan to the top of the Dresbachian or 510.20000 to 485.40000 Ma

Collections (146 total)


Time interval Ma Country or state Original ID and collection number
Cambrian538.8 - 485.4Argentina (Mendoza) P. sp., P. intermedius (200107)
Branchian517.1 - 509.0United Kingdom (England) P. triangulatus (225240)
Delamaran511.2 - 506.5USA (Utah) P. intermedius (10566)
Amgan510.2 - 504.5USA (Utah) P. seminula, P. intermedius (225065 225070)
Solvan510.2 - 504.5Canada (Newfoundland and Labrador) Onymagnostus seminula (10819 10827 10832 10836) Onymagnostus seminula, P. intermedius (10826)
Taijangian509.0 - 504.5China (Hunan) P. affinis (49154) P. atavus (49149 49150 49151 49153 49269 49270 49271 49272) P. atavus, P. affinis (49155 49268) P. atavus, P. cuyanus (49156 49158 49159 49273)
Taijangian509.0 - 504.5China (Sichuan) P. atavus (127058 127059 127060)
Taijangian509.0 - 504.5China (Liaoning) P. sinicus (126817)
Taijangian509.0 - 504.5China (Zhejiang) P. sp., P. atavus, P. sinicus (125682)
Arcadian509.0 - 498.4Canada (New Brunswick) P. atavus (64540)
Arcadian509.0 - 498.4Canada (Newfoundland and Labrador) P. hybridus (9635) P. seminula (9690)
Middle Cambrian509.0 - 497.0Canada (Newfoundland and Labrador) P. atavus (9682)
Middle Cambrian509.0 - 497.0USA (Nevada) P. atavus (156503) P. atavus, P. intermedius (156502) P. atavus, P. seminula, P. intermedius (156500 156501)
Middle Cambrian509.0 - 497.0Norway P. atavus (155478) P. punctuosus (155475) P. sp. (155476)
Middle Cambrian509.0 - 497.0USA (Alaska) P. puncturosus (64765) P. sp. (64766)
Middle Cambrian509.0 - 497.0USA (Utah) P. atavus (86739 86741 86743 156506) P. atavus, P. seminula (156504) P. atavus, P. seminula, P. intermedius (156505) P. intermedius (86728 86730 86735 86736 156507) P. richmondensis (77269 77270 77277)
Middle Cambrian509.0 - 497.0Argentina (Mendoza) P. cuyanus (9815 9816)
Middle Cambrian509.0 - 497.0Italy (Iglesiente) P. sp. (139880)
Middle Cambrian509.0 - 497.0Greenland P. affinis (10484)
St Davids509.0 - 497.0USA (Montana) P. atavus (212)
St Davids509.0 - 497.0Canada (British Columbia) P. burgessensis (215) P. sp. (122017 122072)
St Davids509.0 - 497.0USA (Utah) P. sp. (216)
St Davids509.0 - 497.0United Kingdom (Shropshire) Agnostus lundgreni (55509)
St Davids509.0 - 497.0Greenland P. intermedius (10478)
Taijangian - Wangcunian509.0 - 497.0China (Henan) P. sp. (127073)
Tuesaian505.3 - 503.0Kazakhstan P. affinis (118091) P. atavus (118088 118090 118094) P. atavus, P. affinis (118092 118093) P. atavus, P. intermedius, P. karatauensis (118086) P. atavus, P. karatauensis (118087) P. intermedius (9966 9967) P. intermedius, P. affinis (9969) P. intermedius, P. convexus (118054 118085) P. punctuosus, P. atavus, P. karatauensis (118089)
Floran504.5 - 503.0Australia (Northern Territory) Zeteagnostus sinicus (225075)
Floran504.5 - 503.0Australia (Queensland) P. atavus, P. intermedius (90972) P. atavus, Zeteagnostus incautus (225175) P. atavus, Zeteagnostus incautus, Aristarius retrocornutus (225241)
Floran - Undillan504.5 - 500.5Antarctica P. punctuosus (69520)
Menevian504.5 - 499.5USA (Utah) P. atavus (10567)
Menevian504.5 - 499.5Greenland (Nyeboe Land) P. ciceroides, P. punctuosus (9935)
Menevian504.5 - 499.5Sweden (Scania) P. punctuosus (225250)
Menevian504.5 - 499.5United Kingdom (Wales) P. ciceroides, P. punctuosus (193783) P. davidis, P. ciceroides, P. punctuosus (193782) P. granulatum (198942)
Menevian504.5 - 499.5Denmark (Bornholm) P. punctuosus (75946) P. subsp. indet., P. punctuosus (75947)
Marjumian504.5 - 497.0USA (South Carolina) P. sp. (75062 75063)
Marjumian504.5 - 497.0USA (New York) P. punctuosus (221)
Marjumian504.5 - 497.0USA (Utah) P. akanthodes (225239) P. atavus, P. cuyanus, P. sinicus (230682) P. germanus (77207) P. punctuosus (77206 225249) P. punctuosus, P. atavus, P. cuyanus, P. affinis, P. akanthodes (230679) P. sp. (56144)
Marjumian504.5 - 497.0Canada (Newfoundland and Labrador) P. atavus (9681) P. hybridus (9673) P. seminula (9684 9687 9691)
Wangcunian504.5 - 497.0China (Hunan) P. atavus (128330 128921) P. punctuosus (49282) P. punctuosus, P. atavus (49275) P. punctuosus, P. atavus, P. cuyanus (49161) P. punctuosus, P. cuyanus (49274)
Wangcunian504.5 - 497.0China (Zhejiang) P. atavus (125537) P. sp. (125531)
Undillan503.0 - 500.5Australia (Queensland) Onymagnostus seminula (225223) P. affinis (225237) P. coartatus, P. atavus, Zeteagnostus incautus (225230) P. idmon, P. scarifatus (225226) Ptychagnostus indet. (225220 225245) P. mesostatus, P. punctuosus (225216) P. punctuosus (225222 225243) P. punctuosus, Acidusus germanus (225238) P. punctuosus, Onymagnostus seminula (225218 225221) P. scarifatus (225227)
Undillan503.0 - 500.5Australia (Queeland) P. punctuosus (225234)
Undillan503.0 - 500.5Australia (Northern Territory) P. punctuosus (225215)
Zhanaarykian503.0 - 500.5Kazakhstan P. punctuosus, P. cuyanus, P. spinosus, P. acidusus (118096) P. punctuosus, P. cuyanus, P. spinosus, P. acidusus, P. aksayensis (9964) P. punctuosus, P. cuyanus, P. spinosus, P. acidusus, P. aksayensis, P. affinis (118095) P. spinosus, P. acidusus, P. aksayensis, Zeteagnostus incautus (9963) Zeteagnostus incautus (9962 118097)
Boomerangian500.5 - 499.0Australia (Queenslandd) P. sp. P aff. nathorsti, P. sp. O (225252)
Boomerangian500.5 - 499.0Mexico P. sp., P. atavus (200299)
Guzhangian500.5 - 497.0China (Hunan) P. atavus (128344)
Dresbachian497.0 - 485.4Canada (Newfoundland and Labrador) P. atavus (9702 9703)
Merioneth497.0 - 485.4USA (Vermont) P. sp. (217)