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Journal Article

Earliest Arenig Radiolarians from the Cow Head Group, Western Newfoundland Available to Purchase

Mun-Zu Won, William J. Iams
Published: 01 January 2011
Journal of Paleontology (2011) 85 (1): 156–177.
DOI: https://doi.org/10.1666/10-102.1
... Neoaspiculum , and 11 species, Beothuka aitchisoni , B. grosmornensis , B. stougei , B .? stellata , Neoaspiculum cancellium , N. headense , N. transformum , N. laxum , N .? amplum , Proventocitum cylindricum , and P. piriforme , are new. This study elucidates the reason for the significant difference...
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Figure 6. Scale bar equals 50 µm. 1–10, Neoaspiculum headense delicatum n. ssp. 1, GSC 130963; 2a, b, Wide interpore area, GSC 130964; 3, GSC 130965; 4, GSC 130966; 5, GSC 130967; 6, GSC 130968; 7, GSC 130969; 8a, b, incomplete layers, GSC 130970; 9a, b, proloculus (in dotted circle, which is enlarged on 9b), GSC 130971; 10, proloculus (arrow), GSC 130972; 11, Neoaspiculum? sp., indefinite proloculus in the inner part of the shell wall, GSC 130973; 12–17, Neoaspiculum headense headense n. sp.; 12, GSC 130974; 13, holotype, GSC 130975; 14, wide interpore area (in circle), GSC 130976; 15, GSC 130977; 16, pylome surrounded by by-spines, GSC 130978; 17, wide interpore area (in circle), three to four spines arranged near pylome (arrows), GSC 130979.

Figure 6. Scale bar equals 50 µm. 1–10, Neoaspiculum headense delicatum n... Available to Purchase

Published: 01 January 2011
Figure 6. Scale bar equals 50 µm. 1–10, Neoaspiculum headense delicatum n. ssp. 1, GSC 130963; 2a, b, Wide interpore area, GSC 130964; 3, GSC 130965; 4, GSC 130966; 5, GSC 130967; 6, GSC 130968; 7, GSC 130969; 8a, b, incomplete layers, GSC 130970; 9a, b, proloculus (in dotted
Image
Figure 5. Scale bare equals 50 µm. 1–7, Neoaspiculum transformum n. sp., diverse structure of the proloculus (innermost shell). 1a, b, proloculus not separated from the inner shell, GSC 130950; 2a, b, note the three-dimensional mesh of the inner shell wall and proloculus structure (arrows), GSC 130951; 3a, b, proloculus appears to be two rings, GSC 130952; 4a, b, note the bifurcated inner spines (arrow) and proloculus completely separated from the adjacent shell wall like the microsphere of the Inaniguttidae, GSC 130953; 5–7, ridge or apophyses (arrows) remain as traces of the three-dimensional mesh structure: 5, GSC 130954; 6, GSC 130955; 7, GSC 130956; 8–11a, b, Neoaspiculum? amplum n. sp.: 8, large distance between outermost and inner shell; holotype, GSC 130957; 9, two inner shells, GSC 130958; 10, ridges (arrows) on the inside of the shell wall, GSC 130959; 11a, b, two inner shells and proloculus and three-dimensional mesh structure (in the dotted circle), GSC 130960; 12, 13a, b, Inanigutta sp. 12, microsphere separated from the neighboring shell wall, GSC 130961; 13a, b, wide interpore area, GSC 130962.

Figure 5. Scale bare equals 50 µm. 1–7, Neoaspiculum transformum n. sp., ... Available to Purchase

Published: 01 January 2011
Figure 5. Scale bare equals 50 µm. 1–7, Neoaspiculum transformum n. sp., diverse structure of the proloculus (innermost shell). 1a, b, proloculus not separated from the inner shell, GSC 130950; 2a, b, note the three-dimensional mesh of the inner shell wall and proloculus structure (arrows
Image
Figure 4. Scale bar equals 50 µm. 1a, b–13a, b, Neoaspiculum transformum n. sp. Pylomate and non-pylomate specimens, note the diverse shell wall structure. 1a, b, four shell walls, note irregularly latticed meshwork of the inner shell, GSC 130936; 2a, b, c, non-pylomate specimen: a, fourth shell wall preserved; b, underside of 2a, most of the fourth shell not preserved; c, the delicate meshwork of the outermost shell wall on upper side, holotype, GSC 130937; 3, note the very delicate, partially preserved outermost shell wall and plate perforate outer shell wall, GSC 130938; 4–7, 9, 10, variable meshwork, outermost shell wall not preserved: 4, GSC 130939; 5, GSC 130940; 6, GSC 130941; 7, GSC 130942; 9, GSC 130944; 10, GSC 130945; 8, GSC 130943: 8a, b, outermost shell partly preserved and meshwork of the outer shell having wide distances between pores, GSC 130946; 1b, 11a, b–13a, b, variable meshwork due to diverse pore shape and mesh with thin bars and mesh with narrow to wide interpore areas of the inner shell wall; 1b, enlarged view of specimen in 1a; 11a, b, GSC 130947; 12a, b, GSC 130948; 13a, b, shell wall similar to the antygoporid shell wall, GSC 130949.

Figure 4. Scale bar equals 50 µm. 1a, b–13a, b, Neoaspiculum transformum ... Available to Purchase

Published: 01 January 2011
Figure 4. Scale bar equals 50 µm. 1a, b–13a, b, Neoaspiculum transformum n. sp. Pylomate and non-pylomate specimens, note the diverse shell wall structure. 1a, b, four shell walls, note irregularly latticed meshwork of the inner shell, GSC 130936; 2a, b, c, non-pylomate specimen: a, fourth
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Figure 7. Scale bar equals 50 µm. 1–4, Parechidnina aff. P. aspinosa Won in Won and Below 1999: 1, GSC 130980; 2, GSC 130981; 3, GSC 130982; 4, GSC 130983; 5–8, Neoaspiculum? laxum n. sp.; 5, GSC 130984; 6, holotype, GSC 130985; 7, GSC 130986; 8, GSC 130987; 9–13a, b, Aspiculum jamesi parajamesi n. ssp.; 9, GSC 130988; 10, GSC 130989; 11, GSC 130990; 12, GSC 130992; 13, GSC 131992; 14, Protoentactinia primigena s.l. Won et al., 2005, GSC 131993; 15–18, Protospongentactinia spongiosaWon et al., 2007: 15, GSC 131994; 16, GSC 131995; 17, GSC 131996; 18, GSC 131997.

Figure 7. Scale bar equals 50 µm. 1–4, Parechidnina aff. P. aspinosa Wo... Available to Purchase

Published: 01 January 2011
Figure 7. Scale bar equals 50 µm. 1–4, Parechidnina aff. P. aspinosa Won in Won and Below 1999 : 1, GSC 130980; 2, GSC 130981; 3, GSC 130982; 4, GSC 130983; 5–8, Neoaspiculum ? laxum n. sp.; 5, GSC 130984; 6, holotype, GSC 130985; 7, GSC 130986; 8, GSC 130987; 9–13a, b
Image
Figure 9. Scale bar equals 50 µm. 1–7a, b, Beothuka grosmornensis n. sp.: 1, GSC 131013; 2, GSC 131014; 3, GSC 131015; 4, GSC 131016; 5, holotype, GSC 131017; 6, GSC 131018; 7a, b, mesh with thin bar, narrow bandage, and wide interpore area, GSC 131019; 8–12a, b, Beothuka? stellata n. sp.; 8, holotype, GSC 131020; 9, GSC 131021; 10, GSC 131022; 11, GSC131023; 12a, b, proloculus constructed by thin bars, GSC 131024; 13, 14–16a, b, Neoaspiculum cancellium n. sp.; 13, GSC131025; 14, GSC 131026; 15a, b, enlarged meshwork of the inner shell shows incomplete two-dimensional subspherical shape; holotype, GSC 131027; 16a, b, eccentric inner shell, GSC 131028.

Figure 9. Scale bar equals 50 µm. 1–7a, b, Beothuka grosmornensis n. sp.:... Available to Purchase

Published: 01 January 2011
? stellata n. sp.; 8, holotype, GSC 131020; 9, GSC 131021; 10, GSC 131022; 11, GSC131023; 12a, b, proloculus constructed by thin bars, GSC 131024; 13, 14–16a, b, Neoaspiculum cancellium n. sp.; 13, GSC131025; 14, GSC 131026; 15a, b, enlarged meshwork of the inner shell shows incomplete two
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Figure 11. Scale bar equals 50 µm. 1, 2, Antygopora ordovicicaMaletz and Bruton 2005: 1, GSC 131043; 2, GSC 131044; 3a–c, Antygopora sp., note the very small pores and indication of the presence of internal structure on 3c, GSC 131045; 4, Echidnina irregularisWon and Iams, 2002, GSC 131046; 5a, b, Echidnina semiconvexaWon et al., 2005, GSC 131047; 6, Neoaspiculum sp., GSC 131048; 7–9, conodonts from the first assemblage of bed 9 (unit 9.5); 7, Prioniodus adamiStouge and Bagnoli, 1988, GSC 131049; 8, Oelanderdus elongatusLindström, 1955, GSC 131050; 9, Paracordylodus gracilisLindström, 1955, GSC 131051; 10–14, Conodonts from the second assemblage from bed 9: 10, Parapanderodus carlae (Repetski, 1982), GSC 131052; 11, Prioniodus adamiStouge and Bagnoli, 1988, GSC 131053; 12a, b, P element of Oepikodus sp, GSC 131054; 13, Prioniodus adamiStouge and Bagnoli, 1988, GSC 131055; 14, S element of Prioniodus sp., GSC 131056.

Figure 11. Scale bar equals 50 µm. 1, 2, Antygopora ordovicica Maletz and... Available to Purchase

Published: 01 January 2011
131046; 5a, b, Echidnina semiconvexa Won et al., 2005 , GSC 131047; 6, Neoaspiculum sp., GSC 131048; 7–9, conodonts from the first assemblage of bed 9 (unit 9.5); 7, Prioniodus adami Stouge and Bagnoli, 1988 , GSC 131049; 8, Oelanderdus elongatus Lindström, 1955 , GSC 131050; 9