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227 results for “lake morphology”
FIGURES 457–461 in Morphological and molecular characterization of twenty-five new Diploneis species (Bacillariophyta) from Lake Tanganyika and its surrounding areas
FIGURES 457–461. Diploneis elongata sp. nov., SEM external valve views, Lake Tanganyika. 457, 458. Specimen from Kiganza Bay. 459, 460. Specimen from Jakobsen Beach. 461. Specimen from Kalambo Falls Lodge. 457, 460. View of a whole valve. 458. Central area showing the teardrop shaped depression with proximal raphe ends; note inter-areolar semi-circular shaped fin ornamentations of the canal and biseriate striae (white arrow). 459. Close view of the areolae structure in a broken specimen. 461. Distal raphe ends with deflected terminal fissures. Scale bars = 10 μm (Figs 457, 460), 5 μm (Fig. 458), 2 μm (Figs 459, 461).
FIGURES 434–438 in Morphological and molecular characterization of twenty-five new Diploneis species (Bacillariophyta) from Lake Tanganyika and its surrounding areas
FIGURES 434–438. Diploneis cocquytiana sp. nov., SEM external valve views, Lake Tanganyika, Isanga Bay. 434, 437. View of a whole valve. 435. Mid-valve, showing linear extended teardrop shaped depressions with proximal raphe ends and serrated inter-areolar fin-like shaped ornamentations. 436. Half-valve, showing the raphe branch system. 438. Distal raphe end with deflected terminal fissure; white arrowed uniseriate becoming biseriate striae pattern. Scale bars = 10 μm (Figs 434, 437), 5 μm (Figs 435, 436, 438).
FIGURES 409–414 in Morphological and molecular characterization of twenty-five new Diploneis species (Bacillariophyta) from Lake Tanganyika and its surrounding areas
FIGURES 409–414. Diploneis clara sp. nov., SEM external valve views, Lake Tanganyika. 409–411. Specimen from Isanga Bay. 412– 414. Specimen from Kalambo Falls Lodge. 409. A whole valve. 410. Distal raphe ends with deflected terminal fissures; white arrowed uniseriate becoming biseriate striae pattern. 411. Central area with linear extended teardrop shaped depressions with proximal raphe ends. 412. Central area of corroded valve. 413. View of a corroded valve. 414. Valve apices of corroded specimen. Scale bars = 10 μm (Fig. 409), 5 μm (Figs 410, 411, 413, 414), 2 μm (Fig. 412).
FIGURES 379–383 in Morphological and molecular characterization of twenty-five new Diploneis species (Bacillariophyta) from Lake Tanganyika and its surrounding areas
FIGURES 379–383. Diploneis kilhamiana sp. nov., SEM internal valve views, Lake Tanganyika, Rukoma area. 379. A whole valve. 380. Distal raphe endings slightly elevated and distant from the valve apices. 381. Half valve, showing raphe branch and valvocopula with serrated advalvar edges. 382. Close view of alveolate openings covered by thin silica layers; where destroyed the areolae are visible. 383. Central area with simple and slightly elevated proximal raphe ends. Scale bars = 5 μm (Fig. 379), 2 μm (Figs 380–383).
FIGURES 549–560 in Morphological and molecular characterization of twenty-five new Diploneis species (Bacillariophyta) from Lake Tanganyika and its surrounding areas
FIGURES 549–560. Diploneis distinctebipunctata sp. nov., LM valve views. All individuals displayed from the type material, Mulungushi River. Fig. 552. Holotype specimen. Scale bar = 10 μm.
FIGURE 620 in Morphological and molecular characterization of twenty-five new Diploneis species (Bacillariophyta) from Lake Tanganyika and its surrounding areas
FIGURE 620. Molecular phylogeny of the genus Diploneis. (A) Maximum likelihood phylogeny based on rbcL chloroplast marker. (B) Maximum likelihood phylogeny based on chloroplast (rbcL) and nuclear (18S) markers. Grey branches denote outgroup taxa, light green marine and freshwater species outside East Africa, green species from the surrounding of Lake Tanganyika, dark green Tanganyika species, asterisks BI bootstrap postprobs (legend in figure). Colored symbols next to each Tanganyika species correspond to the analyzed species for the landmarks in the biplot from Fig. 619.
FIGURES 561–566 in Morphological and molecular characterization of twenty-five new Diploneis species (Bacillariophyta) from Lake Tanganyika and its surrounding areas
FIGURES 561–566. Diploneis distinctebipunctata sp. nov., SEM external (Figs 561–565) and internal (Fig. 566) valve views, Mulungushi River. 561. View of a whole frustule. 562. Detail valve apices, showing distal raphe ends with deflected terminal fissures; white arrowed irregularly spaced and shaped round ornamentations along the raphe branch. 563. Close view of biseriate striae pattern and chambered wall. 564. External and internal view of alveoli. 565. Central area showing teardrop shaped depressions with proximal raphe ends. 566. View of a whole valve, showing raphe structure, alveoli structure, and valvocopula with serrated advalvar edges. Scale bars. Scale bars = 10 μm (Figs 561, 566), 5 μm (Figs 562, 564, 565), 2 μm (Fig. 563).
FIGURES 349–372 in Morphological and molecular characterization of twenty-five new Diploneis species (Bacillariophyta) from Lake Tanganyika and its surrounding areas
FIGURES 349–372. Diploneis kilhamiana sp. nov., LM valve views, Lake Tanganyika. 349. Specimen from Jakobsen Beach. 350–352, 354. Specimens from Kiganza Bay. 353. Specimen from Rukoma area. 355. Specimen from Isanga Bay. 356–367, 369–372. Specimens from Kalambo Falls Lodge. 368. Specimen from Mahale National Park. Fig. 370. Holotype specimen. Scale bar = 10 μm.
FIGURES 323–343 in Morphological and molecular characterization of twenty-five new Diploneis species (Bacillariophyta) from Lake Tanganyika and its surrounding areas
FIGURES 323–343. Diploneis angusta sp. nov., LM valve views, Lake Tanganyika. 323, 324, 334. Specimens from Ndole Bay. 325, 326, 328, 330, 331, 335, 339–343. Specimens from Cape Nangu at Kasaba Bay. 327, 329, 333, 336, 338. Specimens from Isanga Bay. 332. Specimen from Kalambo Falls Lodge. 337. Specimen from Mahale National Park. Fig. 331. Holotype specimen. Scale bar = 10 μm.
FIGURES 299–322 in Morphological and molecular characterization of twenty-five new Diploneis species (Bacillariophyta) from Lake Tanganyika and its surrounding areas
FIGURES 299–322. Diploneis nana sp. nov., LM (Figs 299–319), SEM external (Figs 320, 322), and internal (Fig. 321) valve views, Lake Tanganyika. 299–302, 304, 306–308, 310–312, 315–318. Specimens from the type material, Mahale National Park. 303, 319. Specimens from Isanga Bay. 305, 309, 313, 314, 320–322. Specimens from Kiganza Bay. Fig. 306. Holotype specimen. Fig. 320. Valve view, showing canal structure, striae structure, and inter-areolar fin-like silica ridges. 321. Valve view, showing simple raphe branch and alveoli occluded by thin silica layers. 322. Detail central area with teardrop shaped depressions with proximal raphe ends bent to the same side of the valve; white arrowed inter-areolar fin-like shaped ornamentations. Scale bars = 10 μm (Figs 299–319), 5 μm (Figs 320, 321), 2 μm (Fig. 322).
FIGURES 294–298 in Morphological and molecular characterization of twenty-five new Diploneis species (Bacillariophyta) from Lake Tanganyika and its surrounding areas
FIGURES 294–298. Diploneis duplex sp. nov., SEM internal valve views, Lake Tanganyika. 294, 295, 296, 298. Specimen from Isanga Bay. 297. Specimen from Kalambo Falls Lodge. 294. Valve view and valvocopula with serrated advalvar edges. 295. Detail mid-valve, showing simple and slightly elevated proximal raphe ends. 296. Detail alveoli openings occluded by thin layers; white arrowed destroyed thin layer showing the biseriate striae. 297. View of a broken valve. 298. Distal raphe ends slightly elevated and distant from the valve apices. Scale bars = 10 μm (Fig. 294), 5 μm (Figs 295, 297, 298), 2 μm (Fig. 296).
FIGURES 373–378 in Morphological and molecular characterization of twenty-five new Diploneis species (Bacillariophyta) from Lake Tanganyika and its surrounding areas
FIGURES 373–378. Diploneis kilhamiana sp. nov., SEM external valve views, Lake Tanganyika. 373–376. Specimens from Kalambo Falls Lodge. 377, 378. Specimen from Isanga Bay. 373. View of a whole valve. 374. Detail valve apices, showing distal raphe ends with deflected terminal fissures and internal alveoli structure. 375. Internal and external valve view. 376. Central area with linear extended teardrop shaped depressions with proximal raphe ends and inter-areolar semi-circular shaped fin ornamentations on the canal. 377. Close view of distal raphe ends. 378. Close view of biseriate striae pattern. Scale bars = 10 μm (Fig. 373), 5 μm (Fig. 375), 2 μm (Figs 374, 376–378).
FIGURES 506–511 in Morphological and molecular characterization of twenty-five new Diploneis species (Bacillariophyta) from Lake Tanganyika and its surrounding areas
FIGURES 506–511. Diploneis serrulata sp. nov., SEM external valve views, Lake Tanganyika. 506, 509, 510. Specimen from Isanga Bay. 507, 508, 511. Specimen from Chituta Bay. 506. View of a whole valve. 507. View of the whole frustule, white arrowed serrated valvocopula. 508. Close view of fin-like silica ridges. 509. Central area showing teardrop shaped depressions with proximal raphe ends; white arrowed inter-areolar semi-circular shaped fin ornamentations on the canal. 510. Raphe branch with proximal and distal ends bent to the same side of the valve. 511. Close view of uniseriate becoming biseriate striae; white arrowed the inter-areolar fin-like silica ridges serrated into ca. 8–12 notched edges. Scale bars = 5 μm (Figs 506, 507, 510), 2 μm (Figs 508, 509), 1 μm (Fig. 511).
FIGURES 288–293 in Morphological and molecular characterization of twenty-five new Diploneis species (Bacillariophyta) from Lake Tanganyika and its surrounding areas
FIGURES 288–293. Diploneis duplex sp. nov., SEM external valve views, Lake Tanganyika. 288, 291, 293. Specimens from Kiganza Bay. 289, 290. Specimen from Chituta Bay. 292. Specimen from Isanga Bay. 288, 293. View of a whole valve, showing canal structure, striae structure (white arrow), and inter-areolar fin-like shaped ornamentations. 289. Central area showing extended teardrop shaped depression with proximal raphe ends. 290, 291. Distal raphe ends with deflected terminal fissures. 292. White arrowed the biseriate striae in a broken specimen. Scale bars = 5 μm (Figs 288, 293), 2 μm (Figs 289–292).
FIGURES 442–456 in Morphological and molecular characterization of twenty-five new Diploneis species (Bacillariophyta) from Lake Tanganyika and its surrounding areas
FIGURES 442–456. Diploneis elongata sp. nov., LM valve views, Lake Tanganyika. 442. Specimen from Kasaba Bay. 443–446, 449– 452, 454–456. Specimens from Kalambo Falls Lodge. 447, 448, 453. Specimens from Kiganza Bay. Fig. 456. Holotype specimen. Scale bar = 10 μm.
FIGURES 419–433 in Morphological and molecular characterization of twenty-five new Diploneis species (Bacillariophyta) from Lake Tanganyika and its surrounding areas
FIGURES 419–433. Diploneis cocquytiana sp. nov., LM valve views, Lake Tanganyika. 419, 420, 422, 423–426, 428, 429, 431, 432. Specimens from Kalambo Falls Lodge. 421, 427, 430. Specimens from Kiganza Bay. 433. Specimen from Rukoma area. Fig. 429. Holotype specimen. Scale bar = 10 μm.
FIGURES 384–408 in Morphological and molecular characterization of twenty-five new Diploneis species (Bacillariophyta) from Lake Tanganyika and its surrounding areas
FIGURES 384–408. Diploneis clara sp. nov., LM valve views, Lake Tanganyika. 384, 385. Specimens from Jakobsen Beach. 386, 387, 396, 407, 408. Specimens from Kalambo Falls Lodge. 388, 389, 397, 398, 400, 404. Specimens from Isanga Bay. 390, 391, 392, 393. Specimens from Mutondwe Island. 394, 395, 402, 403, 406. Specimens from Kiganza Bay. 399. Specimen from Chituta Bay. 401, 405. Specimens from Ndole Bay. Fig. 399. Holotype specimen. Scale bar = 10 μm.
FIGURES 249–253 in Morphological and molecular characterization of twenty-five new Diploneis species (Bacillariophyta) from Lake Tanganyika and its surrounding areas
FIGURES 249–253. Diploneis disjuncta sp. nov., SEM external valve views, Lake Tanganyika. 249. Specimen from Kalambo Falls Lodge. 250–253. Specimen from Chituta Bay. 249. External and internal view of the whole frustule. 250. View of a whole valve, showing uniseriate striae at mid-valve (white arrow) and biseriate striae pattern at valve apices (black arrow). 251. Distal raphe ends with deflected terminal fissures. 252. Close view of cribra and areolae structure in a broken specimen. 253. Central area showing teardrop shaped depression with proximal raphe ends. Scale bars = 10 μm (Fig. 249), 5 μm (Figs 250, 253), 2 μm (Figs 251, 252).
FIGURES 258–287 in Morphological and molecular characterization of twenty-five new Diploneis species (Bacillariophyta) from Lake Tanganyika and its surrounding areas
FIGURES 258–287. Diploneis duplex sp. nov., LM valve views, Lake Tanganyika. 258, 259, 263–266, 269, 270, 273, 284. Specimens from Kalambo Falls Lodge. 260, 261, 271, 272, 274–281, 285–287. Specimens from Mahale National Park. 262, 282, 283. Specimens from Isanga Bay. 267, 268. Specimens from Ndole Bay. Fig. 269. Holotype specimen. Scale bar = 10 μm.
FIGURES 214–248 in Morphological and molecular characterization of twenty-five new Diploneis species (Bacillariophyta) from Lake Tanganyika and its surrounding areas
FIGURES 214–248. Diploneis disjuncta sp. nov., LM valve views, Lake Tanganyika. 214, 216–221, 223. Specimens from Isanga Bay. 215, 225, 228–235, 239–248. Specimens from Mahale National Park. 222. Specimen from Mutondwe Island. 224, 226, 227. Specimens from Kasaba Bay. 236–238. Specimens from Kalambo Falls Lodge. Fig. 224. Holotype specimen. Scale bar = 10 μm.
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