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Figure 4 in Pliocene marine mammals from the Whalers Bluff Formation of Portland, Victoria, Australia

Figure 4. Miocene to Recent Kogiidae tympanics. A-B, Kogiidae gen. et sp. indet. (Pliocene Whalers Bluff Formation, Portland, Victoria, Australia), incomplete left tympanic, NMV P218407 (AC). C-D, Kogiidae gen. et sp. undet. (Lower Pliocene Yorktown Formation, Lee Creek Mine, North Carolina, U.S.A.), incomplete left tympanic, USNM 251118. E-F, Scaphokogia cochlearis (Upper Miocene Pisco Formation, Aguada de Lomas level, Arequipa Department, Peru), incomplete left tympanic, USNM 452993. G-H, Kogiidae gen. et sp. undet. (Lower Pliocene Yorktown Formation, Lee Creek Mine, North Carolina, U.S.A.), incomplete right tympanic, USNM 183008. I-J, Kogia breviceps (Recent, Shelley Beach, Victoria, Australia), incomplete left tympanic, NMV C24976. A, C, E, G, I, all in dorsal view. B, D, F, H, J, all in ventral view. Scale bars equal 10 mm.

opencc-by-4.0Nov 2023View details →

SDUST2020MGCR: a global marine gravity change rate model determined from multi-satellite altimeter data

<p>SDUST2020MGCR.nc is the global marine gravity change rate model covering 70°S~70°N and 0°~360°E on 5′×5′ grids. The dataset contains geospatial information (latitude, longitude), SDUST2020MGCR and an attachment data (GIA MGCR).</p>

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FIG. 2 in Molecular data and culture observations show that the microfilamentous marine alga Uronema marinum Womersley is a member of the genus Okellya Leliaert & Rueness (Cladophorales, Chlorophyta)

FIG. 2. — Maximum likelihood phylogenetic tree of selected Cladophorales Haeckel, showing the position of the species Okellya marina (Womersley) Wetherbee, comb. nov. as sister to Okellya curvata (Printz) Leliaert & Rueness in the Okellyaceae Leliaert & Rueness family. Numbers shown at nodes represent RAxML rapid bootstrap values. The scale is in estimated substitutions per site in the concatenated 18S and 28S alignment.

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FIG. 1 in Molecular data and culture observations show that the microfilamentous marine alga Uronema marinum Womersley is a member of the genus Okellya Leliaert & Rueness (Cladophorales, Chlorophyta)

FIG. 1. — Okellya marina (Womersley) Wetherbee, comb. nov. (strain 56a) from New South Wales: A, tuft of filaments; B, C, newly formed filaments of two and four cells attached by a discoid holdfast (asterisks), apical cells rounded; D, larger filaments occur with dense cytoplasm; E, F, filaments showing a single pyrenoid at the center of cells (arrowheads); G, H, pyrenoids stained with iodine solution (arrowheads); I-M, elongate zoospores (s) have differentiated in an intercalary cell (I) and escape from a pore at the apical end of cells (J-M: arrows); zoospores often fail to escape through the pore and germinate inside the sporangium (K-M), occasionally even forming holdfasts (asterisk in M). Scale bars: A, 50 μm; B, D-I, 10 μm; C, J-M, 20 μm.

Fig. 2 in The Challenges of Incorporating Realistic Simulations of Marine Protists in Biogeochemically Based Mathematical Models

Fig. 2. The mechanistic phytoplankton model of Flynn (2001) that represents multi nutrient uptake and utilisation of N – nitrate; A – ammonium; F – bioavailable iron; P – phosphate; S – silicate; and the interaction with light (PFD). Major flows in and out of state variables (boxes) are depicted by solid arrows, with the major feedback processes depicted by dashed arrows. C – carbon biomass; Cell – cell density; NC – N C-quota; ChlC – chlorophyll C-quota, FC – iron C-quota; IPC – inorganic P C-quota, OPC – organic P C-quota; Scell – silicon cell-quota (reproduced with permission).

Fig. 2 in Living Together in the Plankton: A Survey of Marine Protist Symbioses

Fig. 2. Transmission electron microscopic ultrathin section images of symbionts in some open ocean protists. a – free-living open ocean amoeba with two kinds of intracytoplasmic bacteroids (arrows): round to oval within double membranes, and curved dense rod within a single-membrane vacuole; b – dinoflagellate symbionts as found in planktonic foraminiferans and radiolarians; c – putative prymnesiid symbiont from a radiolarian; d – prasinomonad symbiont from a large spongiose skeletal radiolarian. Figs. b–d: N – nucleus, V – vacuole, arrows – light absorbing plastids (adapted from Anderson 1983). All scale bars: 2 µm.

Fig. 1 in Living Together in the Plankton: A Survey of Marine Protist Symbioses

Fig. 1. Light microscopic images of living symbiont-bearing open ocean protists. a – radiolarian showing the central capsule (Cp) containing the nucleus and surrounding cytoplasm, and external to it, long-tapered, radiating pseudopodia known as axopodia (Ax) appearing as a bright halo, including numerous golden-hued algal symbionts on the axopodia (arrows). Scale bar: 500 µm; b – planktonic foraminiferan bearing a calcitic shell (Sh) and peripherally radiating calcite spines that are covered by pseudopodial cytoplasm bearing scattered algal symbionts (arrows). The small greenish, rounded shell chamber contains dense clusters of symbionts within the intrashell cytoplasm. Scale bar: 100 µm; c – composite image of a portion of a colonial radiolarian with numerous central capsules containing dinoflagellate symbionts (arrows) in the peripheral cytoplasm of the central capsules. The entire colony is enclosed within a optically clear spherical gelatinous sheath. This portion of the colony is illuminated from the lower right-hand side. Scale bar: 500 µm; d – the dinoflagellate Noctiluca scintillans (green form) with numerous living prasinomonad algal symbionts (Pedimonas noctilucae), appearing as clumps of green particles, scattered throughout the cytoplasm. Scale bar: 200 µm.

Fig. 3. A in Changing Views of Arctic Protists (Marine Microbial Eukaryotes) in a Changing Arctic

Fig. 3. A – Whole eukaryotic microbial community bootstrap-supported UPGMA hierarchical clustering tree based on Bray-Curtis ss-diversity metrics. Metazoa were excluded of this analysis; OTU definition as 98% similarity. Analysis were carried out in Qiime as in Kuczynski et al. 2002; samples were subsampled 100 times selecting 2533 sequences (75% of the smallest subsample). B – Only rare eukaryotic community bootstrap-supported UPGMA hierarchical clustering tree based on Bray-Curtis ss-diversity metrics. Metazoa and abundant OTUs (> 0.1%) were excluded of this analysis; OTU definition as 98% similarity. Analysis were carried out in Qiime as in Kuczynski et al. 2002; samples were subsampled 100 times selecting 125 sequences (75% of the smallest subsample).

Fig. 1 in Changing Views of Arctic Protists (Marine Microbial Eukaryotes) in a Changing Arctic

Fig. 1. Polar projections of Arctic Ocean, indicating the three regions outside of the Beaufort Sea, used as an example of community clustering in this review.

opencc-by-4.0Dec 2005View details →

Figure 5 in Pliocene marine mammals from the Whalers Bluff Formation of Portland, Victoria, Australia

Figure 5. Miocene to Pliocene Physeteridae tympanics. A-B, Physeteridae gen. et sp. undet. (Lower Pliocene Yorktown Formation, Lee Creek Mine, North Carolina, U.S.A.), right tympanic, USNM 183007. C-D, Orycterocetus crocodilinus (Middle Miocene Calvert Formation, Zone 14, south of Randle Cliff Beach, Calvert County, Maryland, U.S.A.), right tympanic, USNM 22953. A and C in dorsal view. B and D in ventral view. Scale bars equal 10 mm.

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Figure 9 in Pliocene marine mammals from the Whalers Bluff Formation of Portland, Victoria, Australia

Figure 9. Delphinidae gen. et sp. undet. A (Pleistocene-Pliocene Red Crag, Henley, England), right periotic, NMV P218481 (AC). A, ventral view. B, cranial view. C, medial view. D, lateral view. Scale bar equals 10 mm.

Fig. 20 in Taxonomic diversity of marine planktonic 'y-larvae' (Crustacea: Facetotecta) from a coral reef hotspot locality (Japan, Okinawa), with a key to y-nauplii

Fig. 20. Relative abundance of lecithotrophic y-nauplii at Sesoko Island (Okinawa, Japan) during field work in 2018 and 2019. Grey bars denote the number of lecithotrophic nauplii of each morphospecies that survived until the last naupliar stage during laboratory rearing. Blue bars show the numbers of cyprids that successfully molted from these last-stage nauplii. Images of all lecithotrophic y-naupliar morphospecies obtained during those two years are shown to the same scale.

Fig. 19 in Taxonomic diversity of marine planktonic 'y-larvae' (Crustacea: Facetotecta) from a coral reef hotspot locality (Japan, Okinawa), with a key to y-nauplii

Fig. 19. Last-stage nauplii of four different morphospecies of y-larvae (Facetotecta) from Sesoko Island (Okinawa, Japan). A–E. Y-nauplius Type AK. F–G. Y-nauplius Type AO. H. Y-nauplius Type AM. I–K. Y-nauplius Type AN. Shown either in life (A–B, H) or as slide-mounted exuviae (C–G, I–K). Abbreviations: A1 = first antenna; A2 = second antenna; Md = mandible.

Fig. 16 in Taxonomic diversity of marine planktonic 'y-larvae' (Crustacea: Facetotecta) from a coral reef hotspot locality (Japan, Okinawa), with a key to y-nauplii

Fig. 16. Last-stage nauplii of two different morphospecies of y-larvae (Facetotecta) from Sesoko Island (Okinawa, Japan). A–E. Y-nauplius Type Y. F–J. Y-nauplius Type O*. Shown either in life (A, F–G) or as slide-mounted exuviae (B–E, H–J). Abbreviations: A1 = first antenna; A2 = second antenna; Md = mandible.

Fig. 18 in Taxonomic diversity of marine planktonic 'y-larvae' (Crustacea: Facetotecta) from a coral reef hotspot locality (Japan, Okinawa), with a key to y-nauplii

Fig. 18. Last-stage nauplii of two different morphospecies of y-larvae (Facetotecta) from Sesoko Island (Okinawa, Japan). A–F. Y-nauplius Type AL. G–J. Y-nauplius Type AJ. Shown either in life (A–C, G–J) or as slide-mounted exuviae (D–F). Abbreviations: A1 = first antenna; A2 = second antenna; Md = mandible.

Fig. 17 in Taxonomic diversity of marine planktonic 'y-larvae' (Crustacea: Facetotecta) from a coral reef hotspot locality (Japan, Okinawa), with a key to y-nauplii

Fig. 17. Last-stage nauplii of three different morphospecies of y-larvae (Facetotecta) from Sesoko Island (Okinawa, Japan). A–E. Y-nauplius Type AF. F–K. Y-nauplius Type N*. L. Y-nauplius Type AP. Shown either in life (A–C, F–G) or as slide-mounted exuviae (D–E, H–L). Abbreviations: A1 = first antenna; A2 = second antenna; Md = mandible. L from Grygier et al. (2019).

Fig. 15 in Taxonomic diversity of marine planktonic 'y-larvae' (Crustacea: Facetotecta) from a coral reef hotspot locality (Japan, Okinawa), with a key to y-nauplii

Fig. 15. Last-stage nauplii of two different morphospecies of y-larvae (Facetotecta) from Sesoko Island (Okinawa, Japan). A–F. Y-nauplius Type L. G–M. Y-nauplius Type AB. Shown either in life (A–C, G–J) or as slide-mounted exuviae (D–F, K–M). Abbreviations: A1 = first antenna; A2 = second antenna; Md = mandible.

Fig. 13 in Taxonomic diversity of marine planktonic 'y-larvae' (Crustacea: Facetotecta) from a coral reef hotspot locality (Japan, Okinawa), with a key to y-nauplii

Fig. 13. Last-stage nauplii of two different morphospecies of y-larvae (Facetotecta) from Sesoko Island (Okinawa, Japan). A–E. Y-nauplius Type X. F–J. Y-nauplius Type K. Shown either in life (A–B, F–H) or as slide-mounted exuviae (C–E, I–J). Abbreviations: A1 = first antenna; A2 = second antenna; Md = mandible.

Fig. 14 in Taxonomic diversity of marine planktonic 'y-larvae' (Crustacea: Facetotecta) from a coral reef hotspot locality (Japan, Okinawa), with a key to y-nauplii

Fig. 14. Last-stage nauplii of two different morphospecies of y-larvae (Facetotecta) from Sesoko Island (Okinawa, Japan). A–F. Y-nauplius Type M. G–L. Y-nauplius Type AI. Shown either in life (A–B, G–I) or as slide-mounted exuviae (C–F, J–L). Abbreviations: A1 = first antenna; A2 = second antenna; Md = mandible.

Fig. 9 in Taxonomic diversity of marine planktonic 'y-larvae' (Crustacea: Facetotecta) from a coral reef hotspot locality (Japan, Okinawa), with a key to y-nauplii

Fig. 9. Last-stage nauplii of four different morphospecies of y-larvae (Facetotecta) from Sesoko Island (Okinawa, Japan). A–C. Hansenocaris cristalabri Olesen & Grygier, 2022. D–E. Hansenocaris aquila Olesen & Grygier, 2022. F–H. Y-nauplius Type AC. I–N. Y-nauplius Type AH*. Shown either in life (A–B, F–H, I–J), as slide-mounted exuviae (D–E, K–N) or in SEM (C). Abbreviations: A1 = first antenna; A2 = second antenna; Md = mandible. A–E from Olesen & Grygier (2022).