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Metagnostidae

Agnostida - Metagnostidae

Synonyms
Synonymy list
YearName and author
1909Metagnostidae Jaekel
1913Arthrorhachidae Raymond
1935Geragnostidae Howell
1935Trinodidae Howell
1957Geragnostinae Harrington and Leanza
1968Geragnostidae Robison and Pantoja-Alor p. 775
1997Metagnostidae Whittington et al. p. 373
2002Metagnostidae Jell and Adrain p. 474
2009Metagnostidae Owens and Fortey
2017Metagnostidae Naimark and Pegel p. 1240

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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
familyMetagnostidaeJaekel 1909
familyMetagnostidaeJaekel 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.

Fm. †Metagnostidae Jaekel 1909
show all | hide all
G. †Anglagnostus Howell 1935
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†Anglagnostus dux Callaway 1877
G. †Arthrorhachis Hawle and Corda 1847
+
†Arthrorhachis danica Poulsen 1965
+
†Arthrorhachis elliptifrons Tjernvik 1956
†Arthrorhachis mobergi Tjernvik 1956
†Arthrorhachis tarda Barrande 1846
+
Invalid names: Agnostus glabratus Angelin 1851 [synonym]
†Arthrorhachis tardus Barrande 1846
Invalid names: Girvanagnostus Kobayashi 1939 [synonym]
G. †Chatkalagnostus Khairullina and Abdullaev 1970
G. †Corrugatagnostus Kobayashi 1939
+
†Corrugatagnostus morea Salter 1864
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Invalid names: Corrugatagnostus perrugatus Barrande 1872 [synonym]
Invalid names: Segmentagnostus Pek 1977 [synonym]
G. †Dividuagnostus Koroleva 1982
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†Dividuagnostus minus Koroleva 1982
†Dividuagnostus tortelloi Waisfeld and Vaccari 2009
G. †Galbagnostus Whittington 1965
+
†Galbagnostus galba Billings 1865
G. †Geragnostella Kobayashi 1939
G. †Geragnostus Howell 1935
+
Subg. †Geragnostus (Geragnostus) Howell 1935
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†Geragnostus (Geragnostus) callaveiformis Harrington and Leanza 1957
†Geragnostus (Geragnostus) maurii Harrington and Leanza 1957
†Geragnostus (Geragnostus) nesossii Harrington and Leanza 1957
Subg. †Geragnostus (Microagnostus) Howell 1935
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†Geragnostus (Microagnostus) callaveiformis Harrington and Leanza 1957
†Geragnostus (Microagnostus) calviformis Harrington and Leanza 1957
†Geragnostus (Microagnostus) micropeltis Harrington and Leanza 1957
†Geragnostus (Microagnostus) neumanni Harrington and Leanza 1957
†Geragnostus (Microagnostus) vilonii Harrington and Leanza 1957
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Invalid names: Geragnostus foulonensis Howell 1935 [synonym], Geragnostus languidus Howell 1935 [synonym], Geragnostus manifestus Howell 1935 [synonym]
†Geragnostus callaveiformis Harrington and Leanza 1957
†Geragnostus crassus Tjernvik 1956
†Geragnostus fabius Billings 1865
†Geragnostus occitanus Howell 1935
Invalid names: Neptunagnostella Pek 1977 [synonym]
G. †Granuloagnostus Pek 1970
G. †Homagnostoides Kobayashi 1939
G. †Trinodus M'Coy 1846
+
†Trinodus agnostiformis McCoy 1846
†Trinodus clusus Whittington 1963
†Trinodus cylindricus Chen in Li 1975
†Trinodus elspethi Raymond 1925
†Trinodus jujuyensis Harrington 1938
†Trinodus saltaensis Harrington and Leanza 1957
†Trinodus tardus Barrande 1846
Invalid names: Arthrorhachidae Raymond 1913 [synonym], Geragnostidae Howell 1935 [synonym], Trinodidae Howell 1935 [synonym]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
Entire body: yesf
Adult width: 1.0 to < 10f
Locomotion: slow-movingo
Life habit: epifaunalo
Diet: detritivoreo
Vision: blindf
Comments: BODY SIZE: Based on component genera; 2 of 2 genera share 1 to < 10 width, inconsistent length.f
Created: 2009-06-11 19:55:50
Modified: 2009-12-13 04:35:35
Source: f = family, o = order
References: Hendy 2009, Kiessling 2004

Age range: base of the Paibian to the top of the Harju or 497.00000 to 443.80000 Ma

Collections (453 total)

Oldest occurrences

Time interval Ma Country or state Original ID and collection number
Cambrian538.8 - 485.4USA (Montana) Geragnostus sp. (258)
Cambrian538.8 - 485.4USA (Alaska) Geragnostus sp. (114979)
Paibian497.0 - 494.0USA (Texas) Geragnostus tumidosus (208655 208745)
Trempealeauan492.5 - 485.4USA (Utah) Geragnostus subobesus (219670 219671)
Trempealeauan492.5 - 485.4USA (Nevada) Geragnostus brevis (233789) Geragnostus sp. (203998)
Trempealeauan492.5 - 485.4USA (New Mexico) Geragnostus sp. (203892 203893)
Trempealeauan492.5 - 485.4Canada (Newfoundland and Labrador) Segmentagnostus sp. (105869)
Payntonian489.5 - 488.3Australia (Northern Territory) Geragnostus sp. (77655)
Niuchehean489.5 - 485.4China (Jilin Provence) Geragnostus acrolebus, Geragnostus bisectus (156921) Geragnostus acrolebus, Geragnostus bisectus, Geragnostus expansa (156924) Geragnostus acrolebus, Geragnostus bisectus, Geragnostus magnus (156922) Geragnostus subobesus (156912)
Niuchehean489.5 - 485.4China (Anhui) Geragnostus sp. (127534)

Youngest occurrences
Time interval Ma Country or state PBDB collection number
Ashgill449.5 - 443.7China (Hubei) Trinodus sinensis (114989)
Ashgill449.5 - 443.7USA (Maine) Corrugatagnostus sp., Geragnostus sp., Trinodus tardus (185954)
Ashgill449.5 - 443.7China (ZheJiang) Corrugatagnostus sp. (7767)
Cautleyan449.2 - 448.8United Kingdom (Wales) Arthrorhachis tarda (166331)
Cautleyan - Rawtheyan449.2 - 445.2Belgium Arthrorhachis tarda (185303)
Rawtheyan448.8 - 445.2United Kingdom (Wales) Arthrorhachis sp., Trinodus sp. (3675) Trinodus sp. (81274)
Rawtheyan448.8 - 445.2Norway (Oslo) Arthrorhachis tarda (163300)
Rawtheyan448.8 - 445.2Belgium Arthrorhachis tarda (185319)
Rawtheyan448.8 - 445.2United Kingdom (England) Arthrorhachis sp. (3666 3671 3676) Trinodus sp. (3670)
Hirnantian445.2 - 443.4Poland Arthrorhachis sp. (2760)