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Naraoiidae

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Figure  6 —Nektaspid relationships and stratigraphical order of appearance ...
Published: 01 November 2004
Figure 6 —Nektaspid relationships and stratigraphical order of appearance of taxa. Dotted lines emphasize the family Naraoiidae, which is characterized by the loss of thoracic segments (arrow). The new nektaspid supports a putative “Lazarus effect” within the lineage Naraoiidae. The phylogenetic
Journal Article
Published: 01 November 2004
Journal of Paleontology (2004) 78 (6): 1138–1145.
...Figure 6 —Nektaspid relationships and stratigraphical order of appearance of taxa. Dotted lines emphasize the family Naraoiidae, which is characterized by the loss of thoracic segments (arrow). The new nektaspid supports a putative “Lazarus effect” within the lineage Naraoiidae. The phylogenetic...
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Journal Article
Published: 10 July 2020
Geological Magazine (2021) 158 (3): 509–517.
... Roy, 2013 ) and Silurian (Caron et al . 2004 ) systems. Nektaspida is generally considered to contain three families – Naraoiidae, Liwiidae and Emucarididae (Paterson et al . 2010 , 2012 ; Legg et al . 2013 ; Mayers et al . 2019 ) – and the genus Buenaspis (Lerosey-Aubril et al . 2017...
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Journal Article
Published: 01 March 1999
Journal of Paleontology (1999) 73 (2): 263–287.
...Gregory D. Edgecombe; Lars Ramskold Abstract Cladistic relationships of Trilobita, Naraoiidae (five ingroup taxa), Helmetiida (five ingroup taxa), Xandarellida, and the Cambrian arachnates Retifacies, Sinoburius, Emeraldella, and Sidneyia are investigated based on 29 characters. Documentation...
Journal Article
Published: 01 May 2008
Journal of Paleontology (2008) 82 (3): 585–594.
... the phylogenetic definition “Arachnata” for this clade, sensu Chen et al., 1997 ), particularly the position of the trilobites relative to other arachnomorph taxa. Their cladistic analysis included 18 ingroup terminal taxa from members of the Trilobita, Naraoiidae Walcott, 1912 ; Nectaspidida Raymond, 1920...
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Journal Article
Published: 20 October 2016
Journal of the Geological Society (2017) 174 (1): 1–9.
... a cephalic shield and pygidium of roughly equal size between which are three thoracic segments (with possibly a fourth concealed beneath the cephalic shield); like other primitive, uncalcified trilobites it is in the Naraoiidae family. Myodocope ostracods ( Myodoprimigenia fistuca ) are found in the Soom...
FIGURES
Journal Article
Published: 20 June 2019
Geological Magazine (2020) 157 (1): 35–46.
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Journal Article
Published: 01 November 2001
Journal of Paleontology (2001) 75 (6): 1141–1151.
... appear in the fossil record trilobites are already biogeographically differentiated. As to the inclusiveness of the clade Trilobita, all analyses agree with Whittington's (1977) assessment of the uncalcified Naraoia as related to Trilobita. The family Naraoiidae now includes a variety of taxa...
FIGURES
Journal Article
Journal: PALAIOS
Published: 01 July 2007
PALAIOS (2007) 22 (4): 360–372.
... ( Wills et al., 1998 ). Naraoiidae are considered to be a sister group to trilobites (e.g., Briggs et al., 1992 ; Fortey, 1997 ; Edgecombe and Ramsköld, 1999 ); however, some researchers (e.g., Robison, 1984 ; Budd, 1999 ) treat the nektaspids, including naraoiids, as an aberrant order within...
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