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Naraoiidae
Taxonomy
Naraoiidae was named by Walcott (1912). Its type is Naraoia.
It was assigned to Nectaspidida by Peng et al. (2012); to Nektaspida by Mayers et al. (2019); and to Nektaspidida by Lerosey-Aubril et al. (2020).
It was assigned to Nectaspidida by Peng et al. (2012); to Nektaspida by Mayers et al. (2019); and to Nektaspidida by Lerosey-Aubril et al. (2020).
Subtaxa
Synonymy list
| Year | Name and author |
|---|---|
| 1912 | Naraoiidae Walcott |
| 2012 | Naraoiidae Peng et al. pp. 146 - 148 |
| 2019 | Naraoiidae Mayers et al. pp. 36 - 38 |
| 2020 | Naraoiidae Lerosey-Aubril et al. p. 515 |
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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.
Fm. †Naraoiidae Walcott 1912
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G. †Misszhouia Chen et al. 1997
G. †Naraoia Walcott 1912
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†Naraoia compacta Walcott 1912
†Naraoia longicaudata Zhang and Hou 1985
†Naraoia spinosa Zhang and Hou 1985
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. Peng et al. 2012 | A dorsal exoskeleton divided by a single transverse articulation into two shields, a cephalic shield and a posterior shield. The cephalic shield is round to half-round in dorsal view, devolving spinose or nonspinose in genal angles, both lateral margins and rear margin of po- sterior shield; one pair of lateral project antennas in ante- rior cephalic area. Axial lobe weak, both lateral axial lobe with alimentary system, including alimentary diverticulae and alimentary canal, with appendages in abdominal re- gion. | |
| B. Mayers et al. 2019 | Nektaspid trilobitomorphs with the following characters: cephalon with ovoid truncated shape; convex posterior cephalic margin; presence of ramifications on secondary digestive structures; anterior tapering of trunk relative to cephalic shield; complete effacement of tergite boundaries within fused section of the trunk. (Emended from Zhang et al. 2007.) |
Measurements
No measurements are available
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| Source: o = order, p = phylum | |||||
| References: Kiessling 2004, Budd 1999 | |||||
Age range: base of the Atdabanian to the top of the Hirnantian or 521.00000 to 443.40000 Ma
Collections (91 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Atdabanian | China (Yunnan) | Naraoia longicaudata (86845 86848 90129 90133 90138 90151 90161 96404 96414 96415) Naraoia longicaudata, Naraoia spinosa (86846 86851 90137 90149 90163 90164 90165 90166 90494 90495 96402 96403 96405 96406 96407 96408 96409 96410 96411 96412 96413 96416) Naraoia sp. (86929 86930 86931 86932 86933) Naraoia sp., Naraoia longicaudata, Naraoia spinosa (68083) | |
| Atdabanian | Poland (Pomeranian Voivodeship) | Liwia plana (90598) | |
| Atdabanian | Poland (Masovian Voivodeship) | Liwia convexa (90599) | |
| Atdabanian | China (Guizhou) | Naraoia longicaudata, Naraoia spinosa (86849) | |
| Nangaoian | China (Guizhou) | Naraoia spomposa (128423) | |
| Nangaoian | China (Yunnan) | Naraoia longicaudata (132328) Naraoia longicaudata, Naraoia spinosa (132327 132329 132330 194140 194141 194162) Naraoia sp., Naraoia longicaudata, Naraoia spinosa (194143 194150 194153 194155 194161 194163) Naraoia spinos, Naraoia sp., Naraoia longicaudata (194160) | |
| Nangaoian | China (Hubai) | Naraoia sp., Misszhouia sp. (219687) | |
| Delamaran | Canada (British Columbia) | Naraoia compacta (84412 84414 84415 84416 84418 84419 84422 84423 84425 84426 84427 84429 84430 84431 84432 84433 84434 84435 84436) Naraoia spinifer, Naraoia compacta (84424 84428) | |
| Taijangian | China (Guizhou) | Naraoia sp. (79769 79770) | |
| Middle Cambrian | Canada (Brithish Columbia) | Naraoia sp. (188662 188664) | |
| Middle Cambrian | Canada (British Columbia) | Misszhouia longicaudata, Naraoia compacta (171308) | |
| St Davids | Canada (British Columbia) | Naraoia compacta (122072 122094) | |
| Marjumian | USA (Utah) | Naraoia compacta (77206 228653 230679 230682) | |
| Berounian | Italy (Sardinia) | Tariccoia arrusensis (215899) | |
| Hirnantian | South Africa | Soomaspis splendida (26994) |