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764 results for “foraminifera”
Fig. 18 in Taxonomy and distribution of recent species of the subfamily Nodosariinae (Foraminifera) in Icelandic waters
Fig. 18. Kernel density smoothed distribution (violin plots) of species along physical gradients. A. Depth (m). B. Temperature (°C). C. Salinity (ppt); omitted are two outlier salinity records for N. haliensis Eiland & Guðmundsson, 2004 (33.98 and 34.34 ppt) and one for P. subannulata (Cushman, 1923) (34.3 ppt). Based on BIOICE samples of the RP-epibenthic and detritus sledges.
Fig. 22 in Taxonomy and distribution of recent species of the subfamily Nodosariinae (Foraminifera) in Icelandic waters
Fig. 22. Results of non-metric multidimensional scaling (NMDS) ordination of community composition based on Bray-Curtis dissimilarities on presence/absence data from BIOICE samples of the RPepibenthic and detritus sledges. A. Ordination plot showing site scores as grey dots and species positions in red. Level curves for depth (pale blue) are fitted to NMDS scores with a generalized additive model (vegan function ordisurf). Blue vectors represent linear effects of environmental gradients in latitude, longitude, and depth fitted with the vegan function envfit. B. Map of Icelandic waters with sites colour coded by their scores on the first NMDS axis.
Fig. 21 in Taxonomy and distribution of recent species of the subfamily Nodosariinae (Foraminifera) in Icelandic waters
Fig. 21. Species distributions based on BIOICE samples (Icelandic waters). A. Dentalina filiformis (d'Orbigny, 1826). B. Grigelis pyrula (d'Orbigny, 1826).
Fig. 15 in Taxonomy and distribution of recent species of the subfamily Nodosariinae (Foraminifera) in Icelandic waters
Fig. 15. Pseudonodosaria subannulata (Cushman, 1923). A, C. Megalosphere (BIOICE 2869, IIHN40054), specimen with nearly horizontal sutures (A) and aperture (C). B, D. Megalosphere (BIOICE 2856, IIHN40017), specimen with irregularly slanted sutures (B) and aperture (D). Light source combination of incident light and dark field. Scale bars = 0.25 mm.
Fig. 12. Nodosaria subsoluta Cushman, 1923. A in Taxonomy and distribution of recent species of the subfamily Nodosariinae (Foraminifera) in Icelandic waters
Fig. 12. Nodosaria subsoluta Cushman, 1923. A. Megalosphere side view (BIOICE 2868, IINH 40218). B, D. Microsphere (BIOICE 2219, IINH 40182), side view of specimen containing cytoplasm (B) and aperture (D). C, E. Megalosphere (BIOICE 2978, IINH 40347), side view (C) and aperture (E) stained with indigo blue. Light source combination of incident light and dark field. Scale bars = 0.25 mm.
Fig. 9 in Taxonomy and distribution of recent species of the subfamily Nodosariinae (Foraminifera) in Icelandic waters
Fig. 9. Grigelis semirugosus? (d'Orbigny, 1846). A. Specimen with missing initial end (BIOICE 3669, IINH 40403). B. Detail of aperture (BIOICE 2465, IINH 40402). Light source combination of incident light and dark field. Scale bars = 0.25 mm.
Fig. 11 in Taxonomy and distribution of recent species of the subfamily Nodosariinae (Foraminifera) in Icelandic waters
Fig. 11. Grigelis guttifera (d'Orbigny, 1846) comb. nov. A. Microsphere (BIOICE 3522, IINH 40126), base of chambers hispid; initial end missing. B, D. Megalosphere (BIOICE 2708, IINH 40107), side view, base of chambers mostly with knobs and faint striations (A) and aperture (D) stained with indigo blue. C. Megalosphere (BIOICE 2853, IINH 40236b), base of chambers hispid and with knobs. E. Megalosphere (BIOICE 3166, IINH 40116), aperture stained with indigo blue. Light source combination of incident light and dark field. Scale bars = 0.25 mm.
Fig. 14. Nodosaria incerta Neugeboren, 1856. A, C in Taxonomy and distribution of recent species of the subfamily Nodosariinae (Foraminifera) in Icelandic waters
Fig. 14. Nodosaria incerta Neugeboren, 1856. A, C. Microsphere (BIOICE 2664, IINH 40071), side view (A), showing initial spiral end, and aperture (C). B, D. Megalosphere (BIOICE 3108, IINH 40085), side view (B) and aperture (D). Light source combination of incident light and dark field. Scale bars = 0.25 mm.
Fig. 6 in Taxonomy and distribution of recent species of the subfamily Nodosariinae (Foraminifera) in Icelandic waters
Fig. 6. Dentalina obliqua (Linnaeus, 1758). A, D. Megalosphere (BIOICE 3104, IINH 39227), side view (A) and aperture (D). B–C. Microsphere (BIOICE 2308, IINH 14759), side view (B) and details of the initial spire (C), where outer wall has been etched with acid and stained with indigo blue; diameter of proloculus <0.02 mm. Light source combination of incident light and dark field. Scale bars = 0.25 mm.
Fig. 7 in Taxonomy and distribution of recent species of the subfamily Nodosariinae (Foraminifera) in Icelandic waters
Fig. 7. Dentalina mutabilis (Costa, 1855). A. Megalosphere (BIOICE 3501, IINH 39299), side view. B. Megalosphere (BIOICE 3598, IINH 39281), variant with exceptionally large proloculus. C–E. Megalosphere (BIOICE 3280, IINH 39273), side view (C), aperture (D) and aperture (E) of the same specimen stained with indigo blue. Light source combination of incident light and dark field. Scale bars = 0.25 mm.
Fig. 4 in Taxonomy and distribution of recent species of the subfamily Nodosariinae (Foraminifera) in Icelandic waters
Fig. 4. Dentalina filiformis (d'Orbigny, 1826). A–B. Megalosphere (BIOICE 3600, IINH 40457), side view (B) and aperture (A) stained with indigo blue. Scale bars = 0.25 mm.
Fig. 5 in Taxonomy and distribution of recent species of the subfamily Nodosariinae (Foraminifera) in Icelandic waters
Fig. 5. Dentalina frobisherensis Loeblich & Tappan, 1953. A–C. Megalosphere (BIOICE 3104, IINH 39775), side view (A), details of initial end (B) and aperture (C) stained with indigo blue. D. Megalosphere (BIOICE 3108, IINH 39774), aperture stained with indigo blue. Light source combination of incident light and dark field. Scale bars = 0.25 mm.
Fig. 1. Dentalina antarctica Parr, 1950. A in Taxonomy and distribution of recent species of the subfamily Nodosariinae (Foraminifera) in Icelandic waters
Fig. 1. Dentalina antarctica Parr, 1950. A. Side view of a young microsphere (BIOICE 2149, IINH 40405) with a spiral initial end; light source is a combination of Rotterman contrast and dark field, revealing the perforations with apparent coarse appearance. B–C. Side view (B), and apertural view (C) of megalosphere (BIOICE 2237, IINH 40408). D. Apertural view of a megalosphere (BIOICE 2697, IINH 40421). Light source in B–D is a combination of incident light and dark field. Scale bars = 0.25 mm.
Fig. 2. Dentalina antennula d in Taxonomy and distribution of recent species of the subfamily Nodosariinae (Foraminifera) in Icelandic waters
Fig. 2. Dentalina antennula d'Orbigny, 1846. A, D. Microsphere (BIOICE 2398; IINH 40362) side view (A), and aperture (D). B–C. Megalosphere (BIOICE 2222, IINH 40365), side view (B) and aperture (C), stained with indigo blue. Light source incident light and dark field. Scale bars = 0.25 mm.
Fig. 3. Dentalina elegans d in Taxonomy and distribution of recent species of the subfamily Nodosariinae (Foraminifera) in Icelandic waters
Fig. 3. Dentalina elegans d'Orbigny, 1846. A. Microsphere (BIOICE 2542, IINH 39684) with a spiral chamber arrangement at initial end; light source a combination of Rotterman contrast and dark field, resulting in a coarse appearance. B. Megalosphere (Biocie 2362, IINH 39758), side view showing surface edges of the secondary surface laminations. C–D. Megalosphere (BIOICE 3627, IINH 39842) aperture (C) stained with indigo blue and same specimen with a short spine at initial end (D). E–F. Megalosphere (BIOICE 2049, IINH 39697), aperture (E) stained with indigo blue and side view (F). Light source in B–F is a combination of incident light and dark field. Scale bars = 0.25 mm.
Fig. 17 in Taxonomy and distribution of recent species of the subfamily Nodosariinae (Foraminifera) in Icelandic waters
Fig. 17. Division of 7598 specimens among 14 species of Nodosariinae Ehrenberg, 1838, occurring in 447 BIOICE samples collected with RP- and detritus sledges. A. Number of samples ranked by number of species present. B. Number of samples occupied by each species. C. Relation between number of picked specimens of a species (y axis) and the number of samples it occupies (x axis).
Fig. 8 in Taxonomy and distribution of recent species of the subfamily Nodosariinae (Foraminifera) in Icelandic waters
Fig. 8. Grigelis pyrula (d'Orbigny, 1826). A–B. Specimen with missing initial end (BIOICE 2424, IINH 40388), side view (A) and detail of aperture (B), stained with indigo blue. C. Megalospheres (BIOICE 2966, IINH 40390), initial ends of specimens with damaged apertures. Light source combination of incident light and dark field. Scale bars = 0.25 mm.
Fig. 13 in Taxonomy and distribution of recent species of the subfamily Nodosariinae (Foraminifera) in Icelandic waters
Fig. 13. Nodosaria haliensis Eiland & Gudmundsson, 2004. A. Microsphere side view (BIOICE 2526, IINH 40311). B, E. Megalosphere (BIOICE 2118, IINH 40276), side view (B) and aperture (E) stained with indigo blue. C, D. Megalosphere (holotype, BIOICE 2588, IINH 40319), side view (C) and aperture (D) stained with indigo blue. Light source combination of incident light and dark field. Scale bars = 0.25 mm.
Fig. 16. A in Taxonomy and distribution of recent species of the subfamily Nodosariinae (Foraminifera) in Icelandic waters
Fig. 16. A. Combined distribution of the 14 species of Nodosariinae Ehrenberg, 1838. Open black circles are locations of BIOICE samples examined for Foraminifera. Red filled circles show occurrence of Nodosariinae as rare (1–2 specimens), frequent (3–32 specimens), and common (> 32 specimens); circle area increases proportional to average size of the first two bins i.e., rare (1.5), frequent (15), and common (150). B. Depth distribution of BIOICE samples per 100 m depth intervals overlaid with samples containing Nodosariinae in darker grey. C. Interpolated gridded mean bottom water properties for the period 1900–2008: temperature (left) and salinity (right). Depth contours are isobaths at 250 m, 500 m, 1000 m, 1500 m, 2000 m, and 3000 m (Jochumsen et al. 2016: 81, fig. 2; reproduced with permission from ©Elsevier).
Fig. 10 in Taxonomy and distribution of recent species of the subfamily Nodosariinae (Foraminifera) in Icelandic waters
Fig. 10.Grigelis guttifera (d'Orbigny, 1846) comb. nov.A, C. Microsphere with missing initial chambers (BIOICE 2853, IINH 40236a), side view (A) and detail of last chamber (C). B, D. Megalosphere (BIOICE 3264, IINH 40118), side view (B) and aperture (D) stained with indigo blue. Light source combination of incident light and dark field. Scale bars = 0.25 mm.
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