1-20 OF 59 RESULTS FOR

Naraoia

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Article
Published: 01 November 2004
Journal of Paleontology (2004) 78 (6): 1138–1145.
...-bottom communities, but were thought to have become extinct in the Late Ordovician. The unique holotype specimen of Naraoia bertiensis n. sp. comes from a Konservat–Lagerstätte deposit renowned for its eurypterid fauna (the Williamsville Member of the Bertie Formation). Naraoia bertiensis lacks thoracic...
FIGURES | View All (6)
Image
<b>Naraoia</b> spinosa ?  Zhang and Hou, 1985  from the Yu&#x27;anshan Formation (lower...
Published: 01 October 2014
Fig. 10.— Naraoia spinosa ? Zhang and Hou, 1985 from the Yu'anshan Formation (lower Cambrian series 2, stage 3), Kunming, China (teaching collection, Department of Geological Sciences, University of Saskatchewan). A ) Right-posterior portion of the cephalon showing the glabella and caecum
Image
Figure  3 — <b>Naraoia</b> bertiensis  n. sp. (ROM 56013) from the Bertie Formatio...
Published: 01 November 2004
Figure 3 — Naraoia bertiensis n. sp. (ROM 56013) from the Bertie Formation. 1 – 3, Part, overall dorsal view (low-angle light). 1, Specimen covered with ammonium chloride. 2, Specimen photographed in natural conditions. 3, Ventral view, detail of the wide cephalic doublure (high-angle
Image
Figure  4 —Reconstruction of  <b>Naraoia</b> bertiensis  n. sp. with main axes of ...
Published: 01 November 2004
Figure 4 —Reconstruction of Naraoia bertiensis n. sp. with main axes of symmetry
Journal Article
Published: 10 July 2020
Geological Magazine (2021) 158 (3): 509–517.
... that are comparable to those seen in the Cambrian nektaspid Naraoia . The rare occurrence of T. tazagurtensis sp. nov. in the Fezouata Shale and the distribution of other liwiids suggest that these liwiids were originally minor members of open-marine communities during the Cambrian Period, and migrated into colder...
FIGURES | View All (4)
Journal Article
Journal: PALAIOS
Published: 01 July 2007
PALAIOS (2007) 22 (4): 360–372.
.... Identifiable, nonbiomineralized taxa include components of a Burgess Shale–type biota with red and green algae, primitive sponges, and the arachnomorph arthropod Naraoia compacta . Also exceptionally preserved are the filamentous appendages of a large ptychopariid trilobite and assemblages of oriented...
FIGURES | View All (6)
Journal Article
Journal: PALAIOS
Published: 01 February 2006
PALAIOS (2006) 21 (1): 15–25.
..., and (3) duration of anaerobic microbial decay prior to compactional dewatering. A few specimens of Naraoia spinosa from Chengjiang (e.g., Chen et al., 1996 , fig. 230; Vannier and Chen, 2002 , figs. 2C, D, F), where exceptionally preserved fossils occur principally in clay-rich shales, have...
FIGURES | View All (4)
Journal Article
Published: 01 March 2001
Journal of the Geological Society (2001) 158 (2): 211–218.
... been recognized, i.e. Kunmingella–Isoxys–Naraoia assemblage at Chengjiang, Kunmingella – Cricocosmia assemblage at Haikou, and Kunmingella – Wutingaspis – Obolus assemblage at Anning and Wuding. These sites yield new and striking specimens, such as a new tentacular animal, brachiopods with pedicles...
FIGURES | View All (6)
Journal Article
Journal: Geology
Published: 01 November 1999
Geology (1999) 27 (11): 987–990.
...Christopher Nedin Abstract The giant Cambrian form Anomalocaris is considered to have been a raptoral predator of trilobites. However, doubt has been raised about its ability to successfully predate on strongly biomineralized forms (durophagy). A specimen of the trilobite Naraoia from the Early...
Image
TABLE 2 —Comparison of Chengjiang and Kaili deposits based on naraoiid ento...
Published: 01 February 2006
TABLE 2 —Comparison of Chengjiang and Kaili deposits based on naraoiid entombment orientations with respect to bedding. P = bedding-parallel, L = laterally compressed specimen parallel to bedding, O = obliquely oriented, V = vertically oriented, F = folded over. Naraoia longicaudata and N
Journal Article
Journal: PALAIOS
Published: 01 July 2010
PALAIOS (2010) 25 (7): 463–467.
... are common in Chengjiang naraoiids and rare in the other two deposits ( Lin, 2006 ). The composition of the three dimensionally preserved gut contents of Naraoia spinosa from Chengjiang was determined by Bergström et al. (2007) based on X-ray diffraction. This study investigates the dark-colored...
FIGURES
Journal Article
Journal: PALAIOS
Published: 01 October 2014
PALAIOS (2014) 29 (10): 512–524.
...Fig. 10.— Naraoia spinosa ? Zhang and Hou, 1985 from the Yu'anshan Formation (lower Cambrian series 2, stage 3), Kunming, China (teaching collection, Department of Geological Sciences, University of Saskatchewan). A ) Right-posterior portion of the cephalon showing the glabella and caecum...
FIGURES | View All (12)
Journal Article
Journal: Paleobiology
Published: 01 January 2002
Paleobiology (2002) 28 (1): 155–171.
... food. Chatterton et al. (1994) have documented serial repetition of midgut diverticula in the Upper Cambrian trilobite Pterocephalia , and similarly disposed structures appear to be present in other Cambrian trilobites or their relatives; e.g., Olenoides ( Whittington 1980 ), Naraoia...
FIGURES | View All (6)
Image
Palaeogeographical distribution of nektaspids during the (a) Cambrian, (b) ...
Published: 10 July 2020
 2.7, 2.11). The Silurian species Naraoia bertensis Caron et al . 2004 is marked by asterisk. Distribution data based on Whittington ( 1977 ), Robison ( 1984 ), Dzik & Lendzion ( 1988 ), Hammann et al . ( 1990 ), Fortey & Theron ( 1994 ), Hou & Bergström ( 1997 ), Chen et al . ( 1997
Image
Representative fossils from the Mafang quarry. All scale bars, 5 mm. A, Con...
Published: 14 October 2013
, Diandongia pista (brachiopod, BA11-410). E, Archisaccophyllia kunmingensis (cnidarian, BA9-50). F, Naraoia spinosa (arthropod, BA4-289), showing three-dimensional preservation of cephalic diverticulae and midgut. G, Waptia ovata (arthropod, BA10-86) with antennae and eyes preserved. H, Details
Image
Figure 2. EDX analyses of naraoiids from the Chengjiang (orange line), Kail...
Published: 01 July 2010
on naraoiid diverticulae from the Chengjiang Biota, including Misszhouia longicaudata (YPM 224056, orange line) and Naraoia spinosa (NIGP 147861, blue line), indicated with arrows. Scale bars  =  2 mm.
Journal Article
Published: 31 July 2014
Geological Magazine (2015) 152 (2): 351–357.
... evinced by the organization of its digestive system. Ramified digestive glands are present in the Cambrian arthropods Burgessia (e.g. Hughes, 1975 ), Naraoia (e.g. Vannier & Chen, 2002 ; Zhang, Shu & Erwin, 2007 ) and possibly in agnostids (Öpik, 1961 ; Bergström, 1973...
FIGURES
Journal Article
Journal: PALAIOS
Published: 01 July 2007
PALAIOS (2007) 22 (4): 448–453.
..., 1981 ; Shu et al., 2001 ). For example, the appendages of the trilobite Eoredlichia are preserved beneath its exoskeleton, while its long axial spine is always found within the sediment lamina above the pygidial shield ( Fig. 3G ). In other examples, the arthropods Naraoia and Xandarella usually...
FIGURES
Image
Cambrian arthropods with ramified digestive glands. (a–d)  Notchia
        ...
Published: 31 July 2014
Cambrian, Queensland, Australia (based on Whittington et al. 1997 , fig. 223.2); the shape of digestive glands is inferred from impressions on the exoskeleton only and that of the digestive tract is hypothetical. (f) Naraoia (Nektaspidida), lower Cambrian
Journal Article
Published: 01 September 2009
Journal of Paleontology (2009) 83 (5): 820–825.
... in some species, e.g., Naraoia spinosa Zhang and Hou, 1985 ( Zhang et al., 2007 ), may be the dominant part of the exopods. In Kuamaia lata Hou, 1987 the distal lobe has a somewhat comparable shape; the supposed subdivision ( Hou and Bergström, 1997 ) is considered an artifact ( Edgecombe...
FIGURES | View All (5)