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27 results for “Miaolingian”
Synchrotron imagery of phosphatized eggs in Waptia cf. W. fieldensis from the middle Cambrian (Miaolingian; Wuliuan) Spence Shale of Utah
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Data from: Organic-walled microfossils from the Kistedalen Formation, Norway: acritarch chronostratigraphy of the Baltic Miaolingian and evolutionary trends of placoid acritarchs
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New soft-bodied panarthropods from diverse Spence Shale (Cambrian; Miaolingian; Wuliuan) depositional environments
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A possible Cambrian stem-group gnathiferan-chaetognath from the Weeks Formation (Miaolingian) of Utah
<p>In recent years the plethora of "weird wonders", the vernacular for the apparently extinct major bodyplans documented in many of the Cambrian Lagerstätten, has been dramatically trimmed. This is because various taxa have either been assigned to known phyla or at least accommodated in larger monophyletic assemblages. Nevertheless, a number of Cambrian taxa retain their enigmatic status. To this intriguing roster we add <i>Dakorhachis thambus</i> n. gen. n. sp., from the Miaolingian (Guzhangian) Weeks Formation Konservat-Lagerstätte of Utah. Specimens consist of an elongate body lacking appendages, but which is apparently segmented. A prominent feeding apparatus consists of a circlet of triangular teeth, while posteriorly there are three distinct skeletal components. <i>D. thambus</i> n. sp. is interpreted as an ambush predator and may have been partially infaunal. The wider affinities of this new taxon remain conjectural but it is suggested that it may represent a stem-group member of the Gnathifera, today represented by the gnathostomulids, micrognathozoans, rotifers, and possibly with links also to the chaetognaths.</p>
FIGURE 5 in Continuous character variation within the Glossopleura-Anoria-Sonoraspis plexus: Dolichometopid trilobites from the Cadiz Formation (Cambrian: Miaolingian, Wuliuan), California
FIGURE 5. Distributions of EL/GL ratios for Glossopleura and Anoria specimens measured for this study. Individual generic and total-sample distributions are normal by Kolmogorov-Smirnov tests.
FIGURE 7 in Continuous character variation within the Glossopleura-Anoria-Sonoraspis plexus: Dolichometopid trilobites from the Cadiz Formation (Cambrian: Miaolingian, Wuliuan), California
FIGURE 7. Principal components analysis of dolichometopid cranial measurements at genus level. Glossopleura = blue polygons. Sonoraspis = red polygons. Anoria = black polygons. A) PC1 vs PC2. B) PC1 vs PC3. C) PC2 vs PC3. Genera coded by color as noted above. Species denoted by symbols as listed alphabetically here: Glossopleura boccar (open blue squares), G. campbelli (open blue diamonds), G. lodensis (blue stars), G. mckeei (solid blue dots), G. mohavensis (blue dashes), G. producta (open blue triangles), G. similaris (vertical blue bars), G. stephenensis (open blue ovals), G. utahensis (inverted open blue triangles), G. walcotti (filled blue triangles), G. yatesi (filled inverted triangles); Sonoraspis californica (filled red circles), S. gomezi (filled red squares); Anoria baton (black X), A. bessus (open black circles), A. tontoensis (filled black squares).
A possible Cambrian stem-group gnathiferan-chaetognath from the Weeks Formation (Miaolingian) of Utah
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