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24 results for “Globigerinoidesella”
Figure 2 in Systematic taxonomy of the Trilobatus sacculifer plexus and descendant Globigerinoidesella fistulosa (planktonic foraminifera)
Figure 2. Hypothetical visualization of morphology in a single dimension. Trait morphology is normally distributed, whereby the mean morphology (solid vertical arrow) should form the type specimen. Morphospecies with high intraspecific variation may be represented by the dot-dashed distribution curve. Conversely, morphospecies with moderate and low intraspecific variation are represented by the dashed and dotted distribution curves, respectively. Finer taxonomic splitting results in more morphospecies with a narrow (dotted line) distribution curve. SD: standard deviation.
Figure 20 in Systematic taxonomy of the Trilobatus sacculifer plexus and descendant Globigerinoidesella fistulosa (planktonic foraminifera)
Figure 20. Example of circularity and curvature values for Globigerinoidesella fistulosa specimens. More lobate values are those in blue, those less lobate are red. Specimens 1 and 2 are more elongate and possess the lowest circularity values, but have a low perimeter length compared to test area and thus also generate low curvature values. Conversely, specimens 3 and 4 have high curvature values due to the protuberances increasing the perimeter length, but also relatively high circularity values because of the large area compared to test diameter (see Material and methods). Scale bar = 200 Lm.
Figure 15 in Systematic taxonomy of the Trilobatus sacculifer plexus and descendant Globigerinoidesella fistulosa (planktonic foraminifera)
Figure 15. Protuberance development from immaturus and quadrilobatus morphotypes resulting in fistulosa morphotypes (light microscope images). A, Trilobatus quadrilobatus (d'Orbigny, 1846); B, C, Trilobatus immaturus (LeRoy, 1939); D–F, Globigerinoidesella fistulosa (Schubert, 1910). A, ODP Site 1115, Woodlark Basin, western Pacific; 11H/04/25–27 cm (umbilical view). B, C, ODP Site 1115, Woodlark Basin, western Pacific; 11H/04/25–27 cm (umbilical view). D–F, ODP Site 1115, Woodlark Basin, western Pacific; 11H/04/25–27 cm (umbilical view). Scale bar = 100 Lm.
Figure 16 in Systematic taxonomy of the Trilobatus sacculifer plexus and descendant Globigerinoidesella fistulosa (planktonic foraminifera)
Figure 16. Size and ontogeny contrasts in the Trilobatus sacculifer plexus. A–D, Trilobatus sacculifer (Brady, 1877); E, Trilobatus trilobus (Reuss, 1850); F, Globigerinoidesella fistulosa (Schubert, 1910). A–D, GLOW-3, south-west Indian Ocean (A, D, spiral view; B, C, umbilical view, B is similar to subsacculifer morphospecies, see text). E, GLOW-3, south-west Indian Ocean (spiral view; earlier whorls obscured). F, ODP Site 1115, Woodlark Basin, western Pacific; 11H/04/25–27 cm (spiral view). Scale bars = 100 Lm.
Figure 1 in Systematic taxonomy of the Trilobatus sacculifer plexus and descendant Globigerinoidesella fistulosa (planktonic foraminifera)
Figure 1. Phylogenetic interpretations of the evolution of the Trilobatus sacculifer plexus. A, phylogeny of Banner & Blow (1960); B, phylogeny of Keller (1981) based on a stratophenetic investigation (average 12,000-year resolution sampling) of Deep Sea Drilling Project (DSDP) Site 292 (north-western Pacific Ocean); C, phylogeny of Srinivasan & Kennett (1981) and Kennett & Srinivasan (1983). Note that the original nomenclatural combinations (binomial and trinomial) used in the authors' separate phylogenies are retained for this figure.
Figure 22 in Systematic taxonomy of the Trilobatus sacculifer plexus and descendant Globigerinoidesella fistulosa (planktonic foraminifera)
Figure 22. Exponential relationship between maximum test size and test surface area in morphospecies of the Trilobatus sacculifer plexus, and to a lesser extent in Globigerinoidesella fistulosa. The T. sacculifer plexus morphospecies all show comparable relationships, whereas data for G. fistulosa show more scatter.
Figure 21 in Systematic taxonomy of the Trilobatus sacculifer plexus and descendant Globigerinoidesella fistulosa (planktonic foraminifera)
Figure 21. Lobateness of Trilobatus sacculifer plexus morphospecies and Globigerinoidesella fistulosa determined through a combination of circularity and curvature values; A, demonstrates the large variability, but consistently high lobateness values for Globigerinoidesella fistulosa compared to T. sacculifer plexus morphospecies (which have comparatively high circularity and low curvature). Although the T. sacculifer plexus morphospecies appear to form a tight cluster, the lower plot, B, demonstrates the variability in lobateness values (see text for discussion).
Figure 19 in Systematic taxonomy of the Trilobatus sacculifer plexus and descendant Globigerinoidesella fistulosa (planktonic foraminifera)
Figure 19. Surface area of the final chamber compared to the remaining test is expressed in the final chamber dominance ratio, which is plotted against maximum test diameter for Trilobatus sacculifer plexus morphospecies and Globigerinoidesella fistulosa. Trilobatus trilobus values are inherently ± 1 as this forms part of its morphospecies concept (see text).
Figure 18 in Systematic taxonomy of the Trilobatus sacculifer plexus and descendant Globigerinoidesella fistulosa (planktonic foraminifera)
Figure 18. Distribution plot of test diameters (Lm) in the Trilobatus sacculifer plexus from sample GLOW-3. Black dots each represent an individual specimen, grouped at a bin width of 20 Lm per stacked row. Black diamond = mean size. White filled 'violin distributions' show variation in values.
Figure 5 in Systematic taxonomy of the Trilobatus sacculifer plexus and descendant Globigerinoidesella fistulosa (planktonic foraminifera)
Figure 5. Visual representation of image analysis software and measured morphometric and biometric parameters (see text for details of parameter equations).
Figure 4 in Systematic taxonomy of the Trilobatus sacculifer plexus and descendant Globigerinoidesella fistulosa (planktonic foraminifera)
Figure 4. Site location map. Location map showing sites from this study (black star symbols) and the type localities (black triangle symbols) for the investigated morphospecies.
Figure 3 in Systematic taxonomy of the Trilobatus sacculifer plexus and descendant Globigerinoidesella fistulosa (planktonic foraminifera)
Figure 3. Overlapping morphological clusters. As the mean morphology of a population changes gradually on a temporal scale, morphospecies are challenging to delimit, and arbitrary morphospace sectors are required for taxonomic units. SD: standard deviation.
Figure 10 in Systematic taxonomy of the Trilobatus sacculifer plexus and descendant Globigerinoidesella fistulosa (planktonic foraminifera)
Figure 10. Incipient protuberance development in Pleistocene to modern Trilobatus sacculifer. A–L, GLOW-3, south-west Indian Ocean (A, D, F, J, spiral view; B, E, G, K, umbilical view), in B note lobate sac-like chamber, in E note thin final sac-like chamber with different wall texture appearance relative to rest of test; C; detail of wall texture including spine holes; H, detail of two incipient protuberances; I, contrasting wall texture appearance in thinner final sac-like chamber with smooth topography, and penultimate chamber with well-developed sacculifer-like texture and spine holes; L, detail of wall texture showing raised spine bases); M, Barbados, Caribbean Sea, specimen cultured after plankton net collection (umbilical view; reproduced from Brummer et al. 1987, pl. 1, fig. 14); N, Barbados, Caribbean Sea, specimen cultured after SCUBA dive collection (umbilical view; reproduced from B́e et al. 1982, fig. 12); O, P, Barbados, Caribbean Sea, specimens cultured after SCUBA dive collection (umbilical view; note multiple incipient protuberances; reproduced from of Hemleben et al. 1987, pl. 2, figs 11, 12). Scale bars = 100 Lm, except close-up images (I–L) where scale bars = 20 Lm.
Figure 13 in Systematic taxonomy of the Trilobatus sacculifer plexus and descendant Globigerinoidesella fistulosa (planktonic foraminifera)
Figure 13. Globigerinoidesella fistulosa (Schubert, 1910). A–O, ODP Site 1115, Woodlark Basin, western Pacific; 11H/04/25–27 cm (A, C, E, G, I, K, M–O, spiral view, in K note infilled apertures; B, D, F, H, J, umbilical view); L, ODP Site 1115, Woodlark Basin, western Pacific; 10H/03/104–106 cm (spiral view; infilled apertures); P, ODP Site 1115, Woodlark Basin, western Pacific; 10H/04/127–129 cm (spiral view; infilled apertures). Scale bars = 200 Lm.
Figure 9 in Systematic taxonomy of the Trilobatus sacculifer plexus and descendant Globigerinoidesella fistulosa (planktonic foraminifera)
Figure 9. Morphological variation in the final sac-like chamber(s) of Trilobatus sacculifer (Brady, 1877). A–G, I, ODP Site 1115, Woodlark Basin, western Pacific; 11H/04/25–27 cm (A, B, I, spiral view, in A note elongated sac-like chamber; C–G, umbilical view, in D note kummerform sac-like chamber, in F note large, asymmetrical aperture with surrounding imperforate area); H, J–P, ODP Site 871, Limalok Guyot, Marshall Islands, equatorial Pacific 3H/03/60–62 cm (H, J–N umbilical view, in J note lobate sac-like chamber, in K note kummerform sac-like chamber, in L–N note two sac-like chambers; O, P, spiral view; note three sac-like chambers); Q, R, GLOW-3, south-west Indian Ocean (cross sectional view of wall, showing relict spines embedded within wall and chamber layers). Scale bars: A–P = 100 Lm; Q, R = 20 Lm.
Figure 7. Typical Trilobatus immaturus and intergradation with Trilobatus quadrilobatus. A–K in Systematic taxonomy of the Trilobatus sacculifer plexus and descendant Globigerinoidesella fistulosa (planktonic foraminifera)
Figure 7. Typical Trilobatus immaturus and intergradation with Trilobatus quadrilobatus. A–K, Trilobatus immaturus (LeRoy, 1939); L–N, Trilobatus quadrilobatus (d'Orbigny, 1846). A–C, I–K, ODP Site 926, Ceara Rise, western tropical Atlantic, 11H/04/ 50–52 cm (A, B, umbilical view; C, detail wall texture and infilled pores; I, spiral view; J, detail of final chamber wall texture; compare with K, detail of penultimate chamber where primary wall texture is obscured by thick gametogenic calcite); D–H, GLOW-3, south-west Indian Ocean (D, detail of wall texture and imperforate lip on first supplementary aperture; E, H, umbilical view; F, G, spiral view). L–N, GLOW-3, south-west Indian Ocean (L, spiral view; M, umbilical view; N, detail of wall texture including clear spine holes). Scale bars = 100 Lm, except for close-up images C, D, J, K, N, where scale bars = 20 Lm.
Figure 6. Typical Trilobatus trilobus and intergradation with Trilobatus immaturus. A–O in Systematic taxonomy of the Trilobatus sacculifer plexus and descendant Globigerinoidesella fistulosa (planktonic foraminifera)
Figure 6. Typical Trilobatus trilobus and intergradation with Trilobatus immaturus. A–O, Trilobatus trilobus (Reuss, 1850); P, Trilobatus immaturus (LeRoy, 1939). A–K, GLOW-3, south-west Indian Ocean (A, D, E, G, I, spiral view, in D note no spine holes are visible due to gametogenic calcite; B, F, H, J, K, umbilical view, in F note thick gametogenic calcite obscuring sacculifer-type wall texture on penultimate chamber; C, detail of coarse sacculifer-type wall texture and abundant spine holes at intersections of interpore ridges); L, M, ODP Site 926, Ceara Rise, western tropical Atlantic, 11H/04/50–52 cm (umbilical view); N, O, ODP Site 871, Limalok Guyot, Marshall Islands, equatorial Pacific 3H/03/60–62 cm (N, umbilical view; O, detail of gametogenic calcite, no spine holes visible). P, ODP Site 871, Limalok Guyot, Marshall Islands, equatorial Pacific 3H/03/60–62 cm (umbilical view; note final chamber not dominant over previous chambers, compare with A–O). Scale bars = 100 Lm, except for close-up images C and O, where scale bars = 20 Lm.
Figure 14. Trilobatus sacculifer and Globigerinoidesella fistulosa protuberance ultrastructure. A in Systematic taxonomy of the Trilobatus sacculifer plexus and descendant Globigerinoidesella fistulosa (planktonic foraminifera)
Figure 14. Trilobatus sacculifer and Globigerinoidesella fistulosa protuberance ultrastructure. A, Trilobatus sacculifer (Brady, 1877); B–G, Globigerinoidesella fistulosa (Schubert, 1910). A, ODP Site 1115, Woodlark Basin, western Pacific; 10H/04/ 127–129 cm (incipient protuberance with surface texture continuous from chamber). B, C, F, G, ODP Site 1115, Woodlark Basin, western Pacific; 10H/04/127–129 cm (A, numerous spine holes present, many pores obscured/distorted; B, surface texture change towards protuberance ends with blocky thick calcite obscuring pores; F, cross-sectional view of broken protuberance, showing hollow interior; G, cross-sectional view of broken protuberance, showing hollow interior); D, E, ODP Site 1115, Woodlark Basin, western Pacific; 11H/04/25–27 cm (D, surface texture change towards protuberance ends; blocky thick calcite obscuring pores; E, left protuberance marked by change in wall texture at protuberance end, right protuberance has all original surface texture obscured). Scale bars = 20 Lm.
Figure 12. A–C, F–L in Systematic taxonomy of the Trilobatus sacculifer plexus and descendant Globigerinoidesella fistulosa (planktonic foraminifera)
Figure 12. A–C, F–L, Globigerinoidesella fistulosa (Schubert, 1910); D, E, Trilobatus sacculifer (Brady, 1877). A–C, ODP Site 926, Ceara Rise, western tropical Atlantic; 7H/05/27–29 cm (A, umbilical view; B, C, spiral view); F–I, K, ODP Site 926, Ceara Rise, western tropical Atlantic; 8H/02/52–54 cm (F, I, K, umbilical view; G, H, spiral view); J, L, ODP Site 926, Ceara Rise, western tropical Atlantic; 7H/05/27–29 cm (umbilical view). D, E, ODP Site 926, Ceara Rise, western tropical Atlantic; 7H/05/ 27–29 cm (spiral view). Scale bars = 200 Lm.
Figure 8. Typical Trilobatus quadrilobatus and intergradation with Trilobatus sacculifer. A–K in Systematic taxonomy of the Trilobatus sacculifer plexus and descendant Globigerinoidesella fistulosa (planktonic foraminifera)
Figure 8. Typical Trilobatus quadrilobatus and intergradation with Trilobatus sacculifer. A–K, Trilobatus quadrilobatus (d'Orbigny, 1846); L–P, Trilobatus sacculifer (Brady, 1877). A, B, E, F, G–K, ODP Site 871, Limalok Guyot, Marshall Islands, equatorial Pacific 3H/03/60–62 cm (A, E–I, K, umbilical view; B, detail of wall texture, including spine holes, infilled pores, broadened interpore ridges; J, detail of wall texture and imperforate lip developed on primary aperture); C, D, GLOW-3, south-west Indian Ocean (C, umbilical view; D, spiral view). L–P, ODP Site 871, Limalok Guyot, Marshall Islands, equatorial Pacific 3H/03/60–62 cm (L–P, umbilical view; for L note slight chamber flattening compared with I–K). Scale bars = 100 Lm, except for close-up images B and J, where scale bars = 20 Lm.
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