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1,751 results for “molecular phylogenetics”
FIGURES 393–398 in The morphology and molecular phylogenetics of some marine diatom taxa within the Fragilariaceae, including twenty undescribed species and their relationship to Nanofrustulum, Opephora and Pseudostaurosira
FIGURES 393–398. Scanning electron micrographs of Serratifera clavata (type material SZCZCH752, culture). Fig. 393. External view, showing narrowly-linear sternum and single row of areola on valve face. Fig. 394. Close up of head APF, ornamented with granules. Fig. 395. Close up of foot APF, consisting of five observed vertical rows of pores ornamented with projections along vertical margin of pores. Fig. 396. Internal view, showing the absence of rimoportulae. Fig. 397. Close up of specimen in fig. 396, showing areolae occluded by complex volae, projecting from transapical sides of areolae. Fig. 398. A tilted frustule, showing few pain copulae and relatively narrow cingulum.
FIGURES 399–404 in The morphology and molecular phylogenetics of some marine diatom taxa within the Fragilariaceae, including twenty undescribed species and their relationship to Nanofrustulum, Opephora and Pseudostaurosira
FIGURES 399–404. Scanning electron micrographs of Serratifera corallina (type material SZCZE1544, culture). Figs 399–401. External views, showing distinctly narrow-linear sternum, and each stria composed of a single slightly transapically-elliptical areola on both valve face and mantle. Fig. 402. Internal view, showing the absence of rimoportulae and complex volae projecting from transapical side of areolae. Fig. 403. Close up of a valve, showing the presence of a lateral projection (indicated by arrowhead) associated with marginal spine extending to valve mantle. Fig. 404. Plain and open (indicated by arrowhead) copula.
FIGURES 455–458 in The morphology and molecular phylogenetics of some marine diatom taxa within the Fragilariaceae, including twenty undescribed species and their relationship to Nanofrustulum, Opephora and Pseudostaurosira
FIGURES 455–458. Scanning electron micrographs of Serratifera sp.1 (clone CCMP 3169). Fig. 455. External view, showing narrowly-linear sternum and each stria consisting of a single transapically-elongated areola (sometimes two smaller areolae) on both valve face and mantle. Fig. 456. Internal view, showing the absence of rimoportulae. Fig. 457. Tilted valve, showing one row of areolae on mantle. Fig. 458. Girdle view, showing segmented (indicated by arrow) copulae.
FIGURES 449–454 in The morphology and molecular phylogenetics of some marine diatom taxa within the Fragilariaceae, including twenty undescribed species and their relationship to Nanofrustulum, Opephora and Pseudostaurosira
FIGURES 449–454. Scanning electron micrographs of Serratifera takanoi (culture s0308). Figs 449–450. External views, showing narrowly-linear sternum and each stria consisting of a single slightly transapically-elongate areola on both valve face and mantle. Fig. 451. Internal view, showing the absence of rimoportulae. Figs 452–453. Girdle views, showing plain copulae and much wider valvocopulae. Fig. 454. Close up of a girdle view, showing open (indicated by arrowhead) copula.
FIGURES 374–380 in The morphology and molecular phylogenetics of some marine diatom taxa within the Fragilariaceae, including twenty undescribed species and their relationship to Nanofrustulum, Opephora and Pseudostaurosira
FIGURES 374–380. Scanning electron micrographs of Serratifera sp. (S. cf. andersonii) (culture). Figs 374–376. External views, showing narrowly-linear sternum and each stria composed of a single transapically-elongate areola (sometimes two smaller areolae) on both valve face and mantle. Fig. 377. Internal view, showing the absence of rimoportulae. Figs 378–379. Girdle views, showing plain and open copulae. Fig. 380. Close up of specimen in fig. 378, showing fringed structure (indicated by arrowhead) observed at the margin of copula.
FIGURES 381–384 in The morphology and molecular phylogenetics of some marine diatom taxa within the Fragilariaceae, including twenty undescribed species and their relationship to Nanofrustulum, Opephora and Pseudostaurosira
FIGURES 381–384. Scanning electron micrographs of Serratifera sp. (S. cf. andersonii) within different populations. Fig. 381. Clone SZCZP696, from San Sebastian Beach in La Gomera, Canary Islands. Figs 382–384. Clone SZCZM910, from Lokrum Beach, Croatia.
FIGURES 355–359 in The morphology and molecular phylogenetics of some marine diatom taxa within the Fragilariaceae, including twenty undescribed species and their relationship to Nanofrustulum, Opephora and Pseudostaurosira
FIGURES 355–359. Scanning electron micrographs of Pseudostaurosira madagascariensis (type material SZCZCH741, culture). Fig. 355. Internal view, showing the absence of rimoportulae and complex volae. Fig. 356. Girdle view, showing presence of mantle plaques (indicated by arrow). Fig. 357. Girdle view, showing spatulate marginal spines associated with lateral projection at the base (indicated by arrow). Figs 358–359. Girdle views of frustules, showing plain and segmented (at least two fragments) (indicated by arrows) copulae and fringed structures (indicated by arrowheads) observed at the margin of copulae.
FIGURES 368–373 in The morphology and molecular phylogenetics of some marine diatom taxa within the Fragilariaceae, including twenty undescribed species and their relationship to Nanofrustulum, Opephora and Pseudostaurosira
FIGURES 368–373. Scanning electron micrographs of Serratifera andersonii within different populations. Figs 368–370. External views, showing narrowly-linear central sternum, each stria composed by a single extensively transapically-elongate (rarely two smaller) areolae on both valve face and mantle. Fig. 371. Internal views, showing the absence of rimoportulae. Fig. 372. Girdle view, showing cingulum composed by numerous, plain copulae. Fig. 373. Close up of girdle view, showing fringed copulae (indicated by arrow). Figs 368–369, 371, 372–373. Clone SZCZP695, from Langebaan Lagoon, South Africa. Fig. 370. Clone SZCZP1059, from Langebaan Lagoon, South Africa.
FIGURES 349–354 in The morphology and molecular phylogenetics of some marine diatom taxa within the Fragilariaceae, including twenty undescribed species and their relationship to Nanofrustulum, Opephora and Pseudostaurosira
FIGURES 349–354. Scanning electron micrographs of Pseudostaurosira madagascariensis (type material SZCZCH741, culture), showing variations of valve shape as the size decreases. Figs 349–350. Oblong external valves, showing wide central sternum, presence of single round areola on both valve face and mantle, and an arising rim areolar projection (indicated by arrowhead) attached to the side of each areola. Fig. 351. Elliptical external valve, showing one pore apical pore fields (indicated by arrowhead). Fig. 352. Ovate external valve. Figs 353–354. Circular valve and oval valve surface, note the presence of lateral projections associated with the base of marginal spines (arrowhead in Fig. 353) and of areolar rim projections (arrow in Fig. 354).
FIGURES 345–348 in The morphology and molecular phylogenetics of some marine diatom taxa within the Fragilariaceae, including twenty undescribed species and their relationship to Nanofrustulum, Opephora and Pseudostaurosira
FIGURES 345–348. Scanning electron micrographs of Pseudostaurosira elliptica within different populations. Fig. 345. Girdle view, showing fringed structure at margin of copula (indicated by white arrowhead) and ligulae copula (indicated by black arrowhead). Fig. 346. Internal view, showing the absence of rimoportulae and branched volae. Fig. 347. Girdle view, showing the presence of mantle plaques. Fig. 348. Girdle view, showing branched marginal spines with lateral projections associated with the base (indicated by white arrowhead) and another projections (indicated by black arrowhead) originating from opposite side of areolae beneath marginal spines. Figs 345, 348. Clone SZCZCH1248, from Resko Lake, Baltic Sea, Poland. Figs 346–347. Clone s0398, from Międzyzdroje, Baltic Sea, Poland.
FIGURES 341–344 in The morphology and molecular phylogenetics of some marine diatom taxa within the Fragilariaceae, including twenty undescribed species and their relationship to Nanofrustulum, Opephora and Pseudostaurosira
FIGURES 341–344. Scanning electron micrographs of Pseudostaurosira elliptica (SZCZCH1249, culture,). Fig. 341. External view, showing widely-lanceolate central sternum and a single areola per stria on the valve face. Fig. 342. Internal view, showing the absence of rimoportulae and sunken internally apical pore fields. Fig. 343. Close up of girdle view, showing branched marginal spines with lateral projections (indicated by white arrowhead) associated with the base, and another projection (indicated by black arrowhead) originating from opposite side of areola beneath marginal spines. Fig. 344. Girdle view, showing the presence of mantle plaques (indicated by white arrowhead) and fringed structure (indicated by black arrowhead) observed at the margin of a copula.
FIGURES 472–477 in The morphology and molecular phylogenetics of some marine diatom taxa within the Fragilariaceae, including twenty undescribed species and their relationship to Nanofrustulum, Opephora and Pseudostaurosira
FIGURES 472–477. Scanning electron micrographs of Opephoroid sp. (culture s0403 and s0402). Fig. 472. A frustule, showing lanceolate valve with widely central sternum and two rows of areolae on valve face. Fig. 473. Close up of a valve, showing apical pore field ornamented with projections (indicated by white arrow) and areolae occluded by branched volae (indicated by black arrow). Figs 474–475. Girdle views of frustules, showing marginal spines with serrated margin (indicated by white arrow) and globular base with an extending lateral projection (indicated by black arrow) associated with spines. Figs 476–477. Smaller cells, showing elliptical valves with numerous plain copulae.
FIGURES 360–367 in The morphology and molecular phylogenetics of some marine diatom taxa within the Fragilariaceae, including twenty undescribed species and their relationship to Nanofrustulum, Opephora and Pseudostaurosira
FIGURES 360–367. Scanning electron micrographs of Serratifera andersonii (type material SZCZCH1126 and wild material). Figs 360–363. External views, showing one transapically-elongated areola on both valve face and mantle and complex volae (indicated by arrowheads) originating from transapical sides of areolae. Figs 364–365. Internal views, showing the absence of rimoportulae. Fig. 366. Girdle view of a whole frustule, showing spatulate marginal spines and plain, open copulae. Fig. 367. Close up of specimen in fig. 366, showing fringed structure (indicated by arrowhead) observed at the margin of copula. Figs 361, 363–364. Wild material from Sandwich Harbor lagoon in Namibia. Fig. 362. Wild material from Kraalbaai, South Africa.
FIGURES 330–340 in The morphology and molecular phylogenetics of some marine diatom taxa within the Fragilariaceae, including twenty undescribed species and their relationship to Nanofrustulum, Opephora and Pseudostaurosira
FIGURES 330–340. Scanning electron micrographs of Plagiostriata baltica (type material SZCZCH1550, culture). Fig. 330. External view, showing linear valve with indistinct central sternum. Figs 331, 333. Internal views, showing the presence of simple rimoportulae (indicated by arrows). Fig. 332. Internal view, showing the absence of rimoportulae. Figs 334–335. Close up of external APFs, composed by one or two pores. Fig. 336. Close up of internal APF, composed by two pores (indicated by arrow). Fig. 337. Close up of middle part of specimen in fig. 333, showing simple rimoportula. Fig. 338. Close up of middle part of a valve, showing the absence of rimoportula. Fig. 339. Close up of centre part of a valve, showing slit-like external opening (indicated by arrow) of a rimoportula. Fig. 340. A tilted frustule, showing numerous and plain copulae.
FIGURES 324–329 in The morphology and molecular phylogenetics of some marine diatom taxa within the Fragilariaceae, including twenty undescribed species and their relationship to Nanofrustulum, Opephora and Pseudostaurosira
FIGURES 324–329. Scanning electron micrographs of Opephora pacifica (ECT3831, culture). Figs 324–325. External views, showing clavate valves with each stria composed by single elongated areola extending from valve face to mantle continuously and head APFs ornamented with granules (indicated by arrow). Figs 326–327. Internal views, showing the absence of rimoportulae and foot pole APFs composed by up to five observed vertical rows of pores (indicated by arrows). Fig. 328. Girdle view, showing plain and open valvocopulae (indicated by arrow). Fig. 329. Girdle view, showing numerous, open and plain copulae.
FIGURES 318–323 in The morphology and molecular phylogenetics of some marine diatom taxa within the Fragilariaceae, including twenty undescribed species and their relationship to Nanofrustulum, Opephora and Pseudostaurosira
FIGURES 318–323. Scanning electron micrographs of Nanofrustulum sp. 2, Lurio, Mozambique. Figs 318–319. External views, showing narrowly-linear sternum. Fig. 320. Internal and external views, showing branched lateral projection (indicated by arrowhead) on valve face. Fig. 321. Internal view, showing the absence of rimoportulae and APFs composed by one pore (indicated by arrowheads). Figs 322–323. Girdle views, showing plain copulae (indicated by arrow) and lateral projections (indicated by arrowhead) associated with marginal spines.
FIGURES 312–317 in The morphology and molecular phylogenetics of some marine diatom taxa within the Fragilariaceae, including twenty undescribed species and their relationship to Nanofrustulum, Opephora and Pseudostaurosira
FIGURES 312–317. Scanning electron micrographs of Nanofrustulum sp. 1, Florida, USA. Fig. 312. External view, showing narrowly-linear sternum, variable number of areolae on valve face (from two to four). Fig. 313. External view, showing the presence of warts on the central sternum (indicated by arrowhead). Fig. 314. Internal view, showing the absence of rimoportulae and single pore APFs (indicated by arrows). Fig. 315. Girdle view, showing elongate marginal spines with serrated margin, and with lateral projections (indicated by arrow) associated with the base of spines and other projections (indicated by arrowhead) originating from opposite side of areolae beneath marginal spines. Fig. 316. Segmented copulae. Fig. 317. Open copulae.
FIGURES 306–311 in The morphology and molecular phylogenetics of some marine diatom taxa within the Fragilariaceae, including twenty undescribed species and their relationship to Nanofrustulum, Opephora and Pseudostaurosira
FIGURES 306–311. Scanning electron micrographs of Nanofrustulum wachnickianum (other specimens, culture). Figs 306–308. External views, showing widely lanceolate sternum and the presence of warts (indicated by arrow) on valve face. Fig. 309. Internal view, showing branched volae and the absence of rimoportulae. Fig. 310. Girdle view, showing plain copulae. Fig. 311. Girdle view, showing fringed structures (indicated by arrowhead) observed at the margin of copula, and the presence of mantle plaques (indicated by arrow).
FIGURES 300–305 in The morphology and molecular phylogenetics of some marine diatom taxa within the Fragilariaceae, including twenty undescribed species and their relationship to Nanofrustulum, Opephora and Pseudostaurosira
FIGURES 300–305. Scanning electron micrographs of Nanofrustulum wachnickianum (type material SZCZCH285, culture). Fig. 300. External view, showing circular valve with widely-lanceolate sternum and radiating areolae towards to valve mantle. Fig. 301. Internal view, showing the absence of rimoportulae. Fig. 302. Girdle view, showing spatulate marginal spines with serrated margin and lateral projections (indicated by white arrowhead) associated with the base and other projections (indicated by black arrowhead) projecting from opposite side of areolae beneath marginal spines. Fig. 303. Oblique valves, showing warts (indicated by arrow) observed on valve face. Fig. 304. Open copula (indicated by arrowhead). Fig. 305. Girdle view, showing much wider valvocopula, plain and open copulae, and fringed structure (indicated by arrowhead) observed at the margin of copulae.
FIGURES 413–419 in The morphology and molecular phylogenetics of some marine diatom taxa within the Fragilariaceae, including twenty undescribed species and their relationship to Nanofrustulum, Opephora and Pseudostaurosira
FIGURES 413–419. Scanning electron micrographs of Serratifera nosybeana (culture SZCZCH992 and wild material). Figs 413–415. External views, showing narrowly-linear sternum and each stria composed by one (sometimes two) areolae on valve face and one areola on mantle. Figs 416–417. Incomplete external valve views, showing lateral projections (indicated by arrowheads) associated with the base of marginal spines and extending towards to mantle. Fig. 418. Internal view, showing the absence of rimoportulae. Fig. 419. Plain and open copulae. Fig. 416. Wild material from the coast of Nosy Be Island, Madagascar.
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