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95 results for “lacustrine”
FIGURES 64–69 in Morphology of some fossil lacustrine centric species from the western United States assigned to the genus Cyclotella (Bacillariophyta), including four described as new
FIGURES 64–69: Cyclotella pseudokansasica. SEM. Figures 64, 65. External valve views. Prominent spines or spine bases are located about the periphery of the valves. Multiseriate fascicles alternate with thick costae. Openings of the marginal fultoportulae are located near the base of the mantle. Scale bars = 1 µm. Figures 66–69. Internal valve views. The valves have a few to several scattered central areolae, and marginal fultoportulae positioned on every second or third costa. Scale bars = 1 µm (in figs 64–66, 68, 69). Scale bar = 2µm (in fig. 67).
FIGURES 56–63 in Morphology of some fossil lacustrine centric species from the western United States assigned to the genus Cyclotella (Bacillariophyta), including four described as new
FIGURES 56–63: Cyclotella pseudokansasica. LM. Valve views showing size diminution series. Fig. 61. Holotype. Scale bar = 5 µm.
FIGURES 50–55 in Morphology of some fossil lacustrine centric species from the western United States assigned to the genus Cyclotella (Bacillariophyta), including four described as new
FIGURES 50–55: Cyclotella stoermeri. SEM. Figures 50–52. External valve views. Fascicles are comprised of 1–3 rows of small areolae. The ribs are thickened and elevated, becoming thinner on the valve mantle. The valve center has enlarged areolae. Scale bars = 10 and 3 µm, respectively. Figures 53–55, internal valve views. Complex and simple alveolae are positioned around the perimeter of the valves. Thick and thin costae are evident, and marginal fultoportulae are evident on the recessed costae. Rimportulae are positioned also on the recessed costae. Areolae with domed cribra are evident in the center of the valves. Scale bars = 3, 2 and 1 µm, respectively.
FIGURES 32–37 in Morphology of some fossil lacustrine centric species from the western United States assigned to the genus Cyclotella (Bacillariophyta), including four described as new
FIGURES 32–37: Cyclotella discostelliformica. SEM. Figures 32, 33. External views showing valves with sunken and elevated central areas, respectively. Fascicles are composed of 2–5 rows of areolae. Openings of the marginal fultoportulae are located at or near the thickened ribs. They lack tubes or thickenings. The central portion of the valves have isolated areolae, that are larger than those of the fascicles. Scale bars = 1 µm. Figures 34–37. Internal valve views showing a single central fultoportula with 3 satellite pores, and marginal fultoportulae at every costa or every second costa. The rimoportula is located on or near a costa (arrows). Scale bars = 1 µm.
FIGURES 19–24 in Morphology of some fossil lacustrine centric species from the western United States assigned to the genus Cyclotella (Bacillariophyta), including four described as new
FIGURES 19–24: Cyclotella kansasica, SEM. Figures 19–21, external views. Flat valve face has striae with 3–4 rows of areolae towards the margin, and scattered areolae in the center, usually with one enlarged depression. Openings of the marginal fultoportulae occur on every rib. Thick spines or bases are visible on the margin of the valve. Scale bars = 1 µm. Figures 22–24, internal views. Marginal fultoportulae occur on every costa. A ring of simple alveolae is present on the mantle. Central fultoportulae are wanting. Central areolae do not reflect an enlarged opening seen externally. Scale bars = 1 µm.
FIGURES 6–9 in Morphology of some fossil lacustrine centric species from the western United States assigned to the genus Cyclotella (Bacillariophyta), including four described as new
FIGURES 6–9: Cyclotella idahica. SEM. Figures 6, 7, 9. external views. Valve views showing transversely undulate central area with irregularly arranged areolae and covered by bumps. Present are external openings of areolae and short tubes of marginal fultoportulae. Spines and/or spines bases are found on the valve face/mantle junction. Scale bars = 1 µm. Figure 8, internal view. Valve view showing location of one fultoportula on the valve face. Arrow indicates position of the rimportula. Scale bar = 1 µm.
FIGURES 1–5 in Morphology of some fossil lacustrine centric species from the western United States assigned to the genus Cyclotella (Bacillariophyta), including four described as new
FIGURES 1–5: Cyclotella idahica. LM. Valve views showing highly undulate valve face. Fig. 2. Holotype. Scale bar = 10 µm.
FIGURES 40–49 in Morphology of some fossil lacustrine centric species from the western United States assigned to the genus Cyclotella (Bacillariophyta), including four described as new
FIGURES 40–49: Cyclotella stoermeri. LM. Valve views showing size diminution series. Note dissimilar lengths of striae. Fig. 40. Holotype. Scale bar = 10 µm.
FIGURES 25–31 in Morphology of some fossil lacustrine centric species from the western United States assigned to the genus Cyclotella (Bacillariophyta), including four described as new
FIGURES 25–31: Cyclotella discostelliformica. LM. Valve views showing highly undulate valve face. Fig. 31. Holotype. Scale bar = 5 µm.
FIGURES 10–18 in Morphology of some fossil lacustrine centric species from the western United States assigned to the genus Cyclotella (Bacillariophyta), including four described as new
FIGURES 10–18: Cyclotella kansasica. LM. Valve views showing flat valve face and size diminution series. Scale bars = 5 µm.
FIGURES 72–77 in Morphology of some fossil lacustrine centric species from the western United States assigned to the genus Cyclotella (Bacillariophyta), including four described as new
FIGURES 72–77: Cyclotella jonesii. SEM. Figures 72, 73. External valve views of Morphotype 1. Fascicles are comprised of fine areolae, while the tangentially undulate center has larger areolae. Marginal fultoportulae have tubular external openings, located on or about every other costa. Scale bars = 10 µm, respectively. Figure 74. External valve view of Morphotype 2. Multiseriate fascicles are comprised of areolae much smaller than those in the center of the valve. Scale bar = 2 µm. Figure 75. Internal valve view of Morphotype 1. Thick and thin costa are present. Central areolae are numerous. Scale bar = 10 µm. Figures 76, 77. Internal valve view of Morphotype 2. Marginal fultoportulae are located on recessed costae, and have 3 satellite pores. Central fultoportula is present, situated among scattered areolae with domed cribra. Scale bars = 2, and 1 µm, respectively.
Figure 1 in The occurrence of facultative paedomorphosis in a lacustrine population of the Pyrenean newt (Calotriton asper): morphology and age structure
Figure 1. Snout–vent length (SVL, mean ± SE) differences between groups and phenotypes (BJ = branchiate juveniles; MJ = metamorphosed juveniles; PF = paedomorphic females; MF = metamorphic females; PM = paedomorphic males and MM = metamorphic males).
Figure 2 in The occurrence of facultative paedomorphosis in a lacustrine population of the Pyrenean newt (Calotriton asper): morphology and age structure
Figure 2. Plot of the first two PCs of the newts of the Ibón de Perramó population, showing differences between males, females and juveniles.
Figure 3 in The occurrence of facultative paedomorphosis in a lacustrine population of the Pyrenean newt (Calotriton asper): morphology and age structure
Figure 3. (a) Age structure of the newts of Ibón de Perramó population in males (M) and females (F). (b) Age structure of the newts of Ibón de Perramó population in branchiate juveniles (BJ), metamorphosed juveniles (MJ) and larvae (L).
Data from: Do genetic drift and accumulation of deleterious mutations preclude adaptation? Empirical investigation using RADseq in a northern lacustrine fish
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Plant DNA metabarcoding records from three cores of lacustrine lakes along a open larch forest-forest tundra-tundra transect at the Omoloy region, north-eastern Siberia
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Data from: Juvenile divergence in adaptive traits among seven sympatric fish eco-morphs arises before moving to different lacustrine habitats
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Data from: Changes in Eocene plant diversity and composition of the vegetation: the lacustrine archive of Messel (Germany)
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Supplementary material 1 from: Klotz W, von Rintelen T, Wowor D, Lukhaup C, von Rintelen K (2021) Lake Poso's shrimp fauna revisited: the description of five new species of the genus Caridina (Crustacea, Decapoda, Atyidae) more than doubles the number of endemic lacustrine species. ZooKeys 1009: 81-122. https://doi.org/10.3897/zookeys.1009.54303
Table S1. Sample provenience and accession numbers
Supplementary material 2 from: Klotz W, von Rintelen T, Wowor D, Lukhaup C, von Rintelen K (2021) Lake Poso's shrimp fauna revisited: the description of five new species of the genus Caridina (Crustacea, Decapoda, Atyidae) more than doubles the number of endemic lacustrine species. ZooKeys 1009: 81-122. https://doi.org/10.3897/zookeys.1009.54303
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International Brain Laboratory public data
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OpenNeuro
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