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Pararcheoentactinia cowheadensis

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Journal Article

EARLIEST ORDOVICIAN (EARLY TO MIDDLE TREMADOCIAN) RADIOLARIAN FAUNAS OF THE COW HEAD GROUP, WESTERN NEWFOUNDLAND

MUN-ZU WON, WILLIAM J. IAMS, KATHERINE REED
Published: 01 May 2005
Journal of Paleontology (2005) 79 (3): 433–459.
DOI: https://doi.org/10.1666/0022-3360(2005)079<0433:EOETMT>2.0.CO;2
..., 10 genera, and 24 species. Of these, one family Aspiculumidae, one genus, and 19 species are new. The new family and new genus are Aspiculumidae and Aspiculum , respectively. The new species are Pararcheoentactinia ? cowheadensis , Aspiculum eccentricum , Aspiculum ? angulatum , Parechidnina delicata...
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Figure5—A distance of 6 mm on these photographs is equivalent to the length (in μm) noted in the parentheses. 1–4,Parechidnina variospina n. sp. 1, Central position of the basal layer, GSC-122105 (MP36D-3), (50). 2–4, Note the slightly eccentric structure of the shell wall. 2, GSC-122106 (GP26I-1), (50). 3, GSC-122107 (GP26E-17), (33.3). 4, GSC-122108 (GP26B-23), (50). 5–10b,Aspiculum eccentricum n. sp., note the eccentric nature of the shell wall. 5, 6, Weblike shell wall structure; 5, GSC-122109 (MP42B-6), (50), innermost part three-dimensionally interwoven. 6, GSC-122110 (MP42D-5), (50), hollow central cavity within the basal layer. 7, GSC-122111 (MP42F-5), (66.6). 8, 9, Layered shell wall structure; 8, GSC-122112 (MP42B-1), (50), the layered shell wall structure can be partly seen through the broken outermost layer. 9, GSC-122113 (MP42C-2), (58.8), layered shell wall structure is easily observed because the outermost shell layer is not preserved. 10a, 10b, Holotype, GSC-122114 (MP42C-1), (66.6); note variation in meshwork architecture within a single specimen; part of the innermost shell, where the opening is developed, is exposed. 11, 12,Pararcheoentactinia? cowheadensis s.s. n. sp., Morphotype 1. 11, Holotype, GSC-122115 (GP26E-32), (40). 12, GSC-122116 (GP26B-21), (20). 13,Pararcheoentactinia? cowheadensis s.l. n. sp., Morphotype 2, GSC-125477 (BS64B-1), (20). 14–16,Pararcheoentactinia reedae s.s. Won and Iams, 2002, Morphotype 1. 14, GSC-125478 (GP26B-27), (50). 15, GSC-125479 (GP26B-15), (33.3). 16, GSC-125480 (GP26E-29), (28.5), very short spines. 17a, 17b, 18,Pararcheoentactinia reedae s.l. Won and Iams, 2002 Morphotype 7. 17a, 17b, Holotype, GSC-125481 (GP26A-7), (22.2, 8.33), no spinules on the rays. 18, GSC-125482 (GP26A-22), (40)

Figure 5 —A distance of 6 mm on these photographs is equivalent to the len...

Published: 01 May 2005
, Pararcheoentactinia ? cowheadensis s.s. n. sp., Morphotype 1. 11, Holotype, GSC-122115 (GP26E-32), (40). 12, GSC-122116 (GP26B-21), (20). 13, Pararcheoentactinia ? cowheadensis s.l. n. sp., Morphotype 2, GSC-125477 (BS64B-1), (20). 14–16, Pararcheoentactinia reedae s.s. Won and Iams, 2002 , Morphotype 1