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Taxonomy
Megistaspis was named by Jaanusson (1956) [Sepkoski's age data: O Trem-u O Llvi
replacement name for Megalaspis
]. Its type is Trilobites limbatus.
It was assigned to Isotelinae by Hoel (1999); to Asaphida by Sepkoski (2002); and to Asaphidae by Jell and Adrain (2002).
It was assigned to Isotelinae by Hoel (1999); to Asaphida by Sepkoski (2002); and to Asaphidae by Jell and Adrain (2002).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1851 | Megalaspis Angelin |
| 1854 | Megalaspis rudis Angelin figs. PI. XVII fig. 5 · |
| 1956 | Megistaspis Jaanusson |
| 1957 | Megalaspis Harrington and Leanza |
| 1999 | Megistaspis Hoel |
| 2002 | Megistaspis Jell and Adrain p. 404 |
| 2002 | Megalaspis Sepkoski |
| 2002 | Megistaspis 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. †Megistaspis Jaanusson 1956
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Subg. †Megistaspis (Ekeraspis) Tjernvik 1956
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†Megistaspis (Ekeraspis) armata Tjernvik 1956
†Megistaspis (Ekeraspis) euclides Walcott 1925
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Invalid names: Megistaspis (Ekeraspis) albertensis Walcott 1925 [synonym]
†Megistaspis (Ekeraspis) floweri Ross 1970
†Megistaspis (Ekeraspis) heroides Brøgger 1882
†Megistaspis (Ekeraspis) nevadensis Ross 1970
Subg. †Megistaspis (Megistaspidella) Jaanusson 1956
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†Megistaspis (Megistaspidella) acuticauda Angelin 1854
†Megistaspis (Megistaspidella) bombifrons Bohlin 1960
†Megistaspis (Megistaspidella) extenuata Wahlenberg 1821
†Megistaspis (Megistaspidella) gigas Angelin 1878
Subg. †Megistaspis (Megistaspis) Jaanusson 1956
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†Megistaspis (Megistaspis) limbata Boeck 1838
†Megistaspis (Megistaspis) polyphemus Brögger 1882
†Megistaspis (Megistaspis) simon Tjernvik and Johansson 1980
Subg. †Megistaspis (Paramegistaspis) Balashova 1976
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†Megistaspis (Paramegistaspis) estonica Tjernvik 1956
†Megistaspis (Paramegistaspis) leuchtenbergi Lamansky 1905
†Megistaspis (Paramegistaspis) norvegica Tjernvik 1956
†Megistaspis (Paramegistaspis) planilimbata Angelin 1851
Invalid names: Megistaspis (Varvaspis) Tjernvik and Johansson 1980 [objective synonym]
Subg. †Megistaspis (Rhinoferus) Balashova 1976
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†Megistaspis (Rhinoferus) hyorrhina Leuchtenberg 1843
†Megistaspis limbatus Boeck 1838
Invalid names: Megalaspis Angelin 1851 [replaced]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: g = genus, f = family, o = order, c = class | |||||
| References: Hendy et al. 2009, Hendy 2009, Aberhan et al. 2004 | |||||
Age range: base of the Tulean to the top of the Whiterockian or 480.80000 to 457.30000 Ma
Collections (215 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Ibexian | USA (Nevada) | M. sp. (104536) | |
| Tremadoc | Argentina (Jujuy) | Megalaspis sp. (8882) | |
| Tremadoc | Argentina (Salta) | Megalaspis saltaensis (115716) | |
| Tremadoc | Canada (Alberta) | M. sp. (10951) | |
| Tremadoc | Colombia | Megalaspis sp. (8864) | |
| Tremadoc | France (Montagne Noire) | Ekeraspis sp. (20819) | |
| Stairsian | USA (Nevada) | M. nevadensis (104502) | |
| Stairsian - Tulean | Canada (British Columbia) | Kayseraspis euclides (50169) | |
| Tremadocian - Floian | Norway (Oslo-Asker") | M. armata (190980) | |
| Tremadocian - Floian | Sweden | M. sp. (3195) Plesiomegalaspis planilimbata, Plesiomegalaspis heroides (3194) | |
| Tremadocian - Floian | Norway (Modum) | M. planilimbata (190985) M. sp., M. planilimbata (190923) | |
| Tremadocian - Floian | Norway (Oslo-Asker) | M. heroides (190987) M. planilimbata (190979 190992) | |
| Tremadocian - Floian | Sweden (Västergötland) | M. planilimbata (190976) | |
| Tremadocian - Floian | Norway | M. armata, M. planilimbata (190982) | |
| Tremadocian - Floian | Norway (Hedmark) | M. norvegica (190977) | |
| Tremadocian - Floian | Norway (Eiker-Sandsvær) | M. heroides (190881 190882 190887) M. heroides, M. planilimbata (190978) M. planilimbata (190883 190885 190984) M. sp., M. planilimbata (190880) | |
| Lancefieldian | Australia (Tasmania) | M. euclides (165773) M. sp., Ekeraspis sp. (2671) | |
| Lancefieldian | Norway (Ringsaker) | M. sp. (190983) | |
| Hunneberg - Volkhov | Russian Federation (Moscow oblast) | M. limbata (235824) | |
| Tulean | USA (Nevada) | M. floweri (104545) M. sp. (291 104539 104540 104541 104542) | |
| Tulean | USA (Montana) | M. sp. (287) | |
| Arenigian | Argentina (Salta) | Megalaspis pugiocauda (115703) Megalaspis saltaensis (115725 115736 115738 115866) | |
| Dawan | China (AnHui) | M. sp. (7863) | |
| Arenig | China (ShanXi) | M. sp. (7887) | |
| Arenig | France (Montagne Noire) | Ekeraspis sp. (20828) Megalaspis sp. (20821 20831) | |
| Arenig | Norway | M. sp. (3184) | |
| Arenig | China (GanSu) | M. sp. (8575) | |
| Arenig | Bolivia | Megalaspis sp. (8846) | |
| Arenig | China (Sichuan) | M. sp. (7680) | |
| Arenig | Argentina | Megalaspis sp. (8777 9009) | |
| Arenig | Sweden | M. sp. (3196 3197 3198 3199 3248) | |
| Floian | France (Montagne Noire) | Megalaspis goniopleurae, M. sp., M. filacovi (20827) Megalaspis sp. (20820) | |
| Floian - Dapingian | Norway (Eiker-Sandsvær) | M. hyorrhina (191045) | |
| Billingen | Estonia (Harju) | M. estonica (191970) Paramegistaspis leuchtenbergi (191968 191972) | |
| Billingen | Russian Federation | M. estonica (169216 198709) M. estonica, Megalaspides norvegica (169217) M. leuchtenbergi (169231) M. planilimbata, M. leuchtenbergi, Megalaspides norvegica (169218) Paramegistaspis leuchtenbergi (169221) | |
| Billingen | Sweden (Närne) | Plesiomegalaspis estonica (192903) | |
| Billingen | Sweden | M. estonica (198164 198165 198166 198169 198170) M. planilimbata (198184 198187) M. sp. (198179) Plesiomegalaspis estonica (192904) Plesiomegalaspis planilimbata (192718) | |
| Billingen | Estonia | M. estonica (191967 191973) M. sp. (191453) Paramegistaspis leuchtenbergi (191966) | |
| Billingen | Russian Federation (Ingria) | M. estonica (191657 191658 191969) | |
| Langevoja | Sweden | M. limbata (198069 198071 198080 198097 198100 198104 198107 198110) | |
| Hunderum | Sweden | M. acuticauda (198059) | |
| Valaste | Sweden | M. sp. (198039) | |
| Volkhov | Norway | Megalaspis gigas (56469) | |
| Volkhov | Sweden (Bornholm) | M. polyphemus (173625 173626) M. polyphemus, M. limbata (173564 173600) | |
| Volkhov | Russian Federation | M. acuticauda (157117 157119 157120 157121 157124 157126 157127 157128 157130 157133 157135 157137 157139 157140 157141) M. gibba (157105 157110 157113 157131) M. hyorrhina (157102 157104 157111) | |
| Volkhov | Sweden | Megalaspis acuticauda (188266) M. lata (198137 198140 198142 198144 198150 198151 198152 198153 198158) M. limbata (198115 198119 198135) M. simon (198114 198116 198122 198124 198128 198130 198132) M. sp. (198141 198146 198161) | |
| Volkhov | Russian Federation (Leningrag oblast) | M. lata (235818) | |
| Volkhov | Latvia | M. limbata (207274) | |
| Fennian | France (Montagne Noire) | Ekeraspis sp. (20825) | |
| Dapingian | Norway (Eiker-Sandsvær) | M. hyorrhina (191041 191042 191043 191044 191047) | |
| Whiterockian | USA (Nevada) | M. sp. (104329) | |
| Kunda | Belarus | M. sp. (195451) | |
| Kunda | Sweden | Megalaspis acuticauda (188217 188218 188224 188283 188300 188302) Megalaspis centaurus (188285) Megalaspis extenuata (188214 188292) Megalaspis extenuata, Megalaspis rudis (188286) Megalaspis gibba, Megalaspis acuticauda (188268) Megalaspis gigas (188296 188297 188298) Megalaspis heros (188213) Megalaspis heros, Megalaspis extenuata, Megalaspis rudis (188210 188215 188219 188221 188222 188284) Megalaspis heros, Megalaspis gibba, Megalaspis rudis (188271) Megalaspis heros, Megalaspis rudis (188272) Megalaspis heros, Megalaspis sp., Megalaspis rudis (188299) Megalaspis rudis (188273 188279 188280 188282 188287 188288 188289 188290 188291 188293) Megalaspis sp., Megalaspis heros (188295) | |
| Kunda | Latvia | M. limbata (207276) | |
| Kunda | Russian Federation | M. acuticauda (157142 157143 157144 157145 157146 157147 157148 157149) M. sp. (235847) | |
| Kunda | Lithuania | M. sp. (207280) | |
| Kunda | Estonia (Ida-Viru) | M. gibba (195558) | |
| Early/Lower Llanvirn | Norway | M. sp. (3180) | |
| Oretanian | Spain (Guadalajara) | M. sp. (20914) | |
| Llanvirn | China (GanSu) | M. sp. (8567) | |
| Darriwilian | Russian Federation (Siberia) | M. polyphemus (205568) M. sp. (205379) | |
| Darriwilian | Iran | Megalaspis sp. (66865) | |
| Sarka | Czech Republic | M. aliena (3857) | |
| Costonian - Harnagian | Norway | Megalaspis sp. (3255) | |
| Caradoc | China (GanSu) | M. sp. (8565) |