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Arthrorhachis
Taxonomy
Arthrorhachis was named by Hawle and Corda (1847).
It was assigned to Metagnostidae by Owen (1981), Ahlberg (1989), Whittington et al. (1997), Hoel (1999); and to Agnostida by Sepkoski (2002).
It was assigned to Metagnostidae by Owen (1981), Ahlberg (1989), Whittington et al. (1997), Hoel (1999); and to Agnostida by Sepkoski (2002).
Species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1847 | Arthrorhachis Hawle and Corda |
| 1939 | Girvanagnostus Kobayashi |
| 1981 | Arthrorhachis Owen |
| 1989 | Arthrorhachis Ahlberg |
| 1997 | Arthrorhachis Whittington et al. p. 373 |
| 1999 | Arthrorhachis Hoel |
| 2002 | Arthrorhachis Sepkoski |
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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. †Arthrorhachis Hawle and Corda 1847
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†Arthrorhachis danica proxima Fortey 1980
†Arthrorhachis elliptifrons Tjernvik 1956
†Arthrorhachis mobergi Tjernvik 1956
†Arthrorhachis tardus Barrande 1846
Invalid names: Girvanagnostus Kobayashi 1939 [synonym]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: g = genus, f = family, o = order | |||||
| References: Hendy 2009, Kiessling 2004 | |||||
Age range: base of the Varangu to the top of the Hirnantian or 483.80000 to 443.10000 Ma
Collections (78 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Ibexian | Norway (Spitsbergen) | A. danica (106475) | |
| Ibexian | USA (California) | A. sp. (205358) | |
| Tremadocian - Floian | Norway | A. elliptifrons (190970) A. sp. (190982) | |
| Tremadocian - Floian | Norway (Eiker-Sandsvær) | A. elliptifrons (190886 190917) | |
| Varangu | Sweden | A. mobergi (172663) | |
| Varangu | Norway (Oslo) | Trinodus mobergi (3183) | |
| Arenig | United Kingdom (England) | A. sp. (3704 3705) | |
| Billingen | Norway (Spitsbergen) | A. danica (106473) | |
| Llanvirn | Canada (Yukon) | A. sp. (302) | |
| Llandeilo - Caradoc | Canada (Northwest Territories) | A. sp. (316) | |
| Uhaku | Sweden | A. sp. (240530) | |
| Costonian | United Kingdom (Scotland) | A. comes (76076) | |
| Aurelucian | United Kingdom (Scotland) | A. comes (181541) A. doulargensis (181539) | |
| Sandbian | China (Gansu) | A. tarda (182202) | |
| Sandbian | United Kingdom (Scotland) | A. girvanensis (208117 208120 208121 208122 208123 208124 208129) A. sp. (208115) | |
| Sandbian | USA (Virginia) | A. sp. (178252 178253 178255) | |
| Caradoc | USA (Virginia) | A. sp. (326 327) | |
| Caradoc | Ireland | A. knockerkensis (50606) | |
| Caradoc | China (Guizhou) | A. sp. (182198) | |
| Longvillian - Marshbrookian | China (YunNan) | Girvanagnostus sp. (7744) | |
| Burrellian | United Kingdom (Scotland) | Girvanagnostus girvanensis (165043) | |
| Keila | Sweden (Skåne) | A. sp. (153973) | |
| Onnian - Pusgillian | Norway (Hadeland) | A. tarda (164655) | |
| Oandu | Sweden (Skåne) | A. sp. (153974) | |
| Katian | China (JiangSu) | A. tarda (192793 192794 192795 192796) | |
| Katian | Kazakhstan | A. sp. (194848) | |
| Kralodvorian | Czechia (Prague) | A. tarda (76478) | |
| Kralodvorian | Italy (Sardinia) | A. tarda (75890 192914) | |
| Kralodvorian - Rawtheyan | Czechia | A. sp. (3876) | |
| Vormsi | Sweden (Dalarne) | A. tarda (166224) | |
| Pirgu | Sweden (Västergötland) | A. tarda (164836) | |
| Pirgu | Sweden (Skane) | A. tarda (166225 166226) | |
| Pirgu | Sweden (Dalarne) | A. tarda (164812 165085 166221 166223 166329) | |
| Pirgu | Sweden (Skåne) | A. tarda (164567) | |
| Pirgu | Sweden (Vastergotland) | A. tarda (164813 165552 166222) | |
| Pirgu | Denmark | A. tarda (166228 166323 166324) | |
| Pirgu | Sweden (Scania) | A. tarda (166227) | |
| Pirgu | Sweden | A. tarda (166325 166326 166327 166328 166333) | |
| Cautleyan | United Kingdom (Wales) | A. tarda (166331) | |
| Cautleyan - Rawtheyan | Belgium | A. tarda (185303) | |
| Rawtheyan | Norway (Oslo) | A. tarda (163300) | |
| Rawtheyan | United Kingdom (Wales) | A. sp. (3675) | |
| Rawtheyan | United Kingdom (England) | A. sp. (3666 3671 3676) | |
| Rawtheyan | Belgium | A. tarda (185319) | |
| Hirnantian | Poland | A. sp. (2760) |