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66 results for “Pseudostaurosira”
FIGURE 479 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
FIGURE 479. Scatter plot on the first two principal component axis of morphometric data for taxa within Serratifera. 80% variations of each species are encircled by an ellipse.
FIGURES 465–471 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 465–471. Scanning electron micrographs of Stauroforma rinceana (culture SZCZCH1603). Figs 465–466. External views, showing clavate valve with striae consisting of several slit-like areolae extending from valve face to mantle continuously, and short striae (indicated by arrows) near foot pole APFs. Fig. 467. A smaller external view, showing elliptical valve with short striae (indicated by white arrows) near foot APFs and branched volae (indicated by black arrow) projecting from apical side of areolae. Fig. 468. Internal view, showing the absence of rimoportulae. Fig. 469. Close up of a valve, showing head APFs composed by radiate pores from the end of sternum to mantle. Fig. 470. Close up of a valve, showing hyaline area near the apex and foot apical pore field with five observed vertical rows of pores located on valve mantle. Fig. 471. Plain copulae.
FIGURES 459–464 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 459–464. Scanning electron micrographs of Serratifera sp. 2 (clone SZCZP526). Figs 459–461. External views, showing narrowly-linear sternum and each stria composed of a single transapically-elongate areola (sometimes two) on both valve face and mantle. Fig. 462. Internal view, showing the absence of rimoportulae. Fig. 463. Girdle view, showing spatulate marginal spines associated with swelling base (indicated by arrowhead). Fig. 464. Girdle view, showing plain and open copulae, and fringed structure (indicated by arrowhead) observed at the margin of copula.
FIGURES 443–448 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 443–448. Scanning electron micrographs of Serratifera sourniae (wild material). Figs 443–447. External views, showing the variations of valve shape as the size decrease, from clavate to elliptical to oval. Fig. 448. Internal view, showing the absence of rimoportulae. Figs 443–448. Wild material from sampling location where the type material collected, Nosy Be coastal zone, Madagascar.
FIGURES 437–442 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 437–442. Scanning electron micrographs of Serratifera sourniae (type material SZCZE517, including old and young cultures). Fig. 437. External view, showing each stria composed of a single transapically-elongated areola on the valve face, and the presence of granules around the base of marginal spines. Fig. 438. Internal view, showing the absence of rimoportulae. Fig. 439. External view of a larger cell of young culture, showing clavate outline and each stria composed by one transapically-elongated on valve face and one smaller areola on mantle. Fig. 440. A tilted valve, showing the presence of mantle plaques. Fig. 441. Girdle view, showing two smaller areola per stria on valve mantle for oval cell of old culture. Fig. 442. Numerous valves, showing the mixture of clavate and oval cells in young culture.
FIGURES 431–436 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 431–436. Scanning electron micrographs of Serratifera rhombica (culture s0357 and wild material). Figs 431–433. External views, showing narrowly-lanceolate or linear sternum and complex volae, projecting from transapical (sometimes apical) side of areolae. Figs 434–435. Internal views, showing the absence of rimoportulae. Fig. 436. Girdle view, showing plain copulae and much wider valvocopulae. Figs 431–432, 434. Wild material from the coast of Nosy Be Island, Madagascar.
FIGURE 478 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
FIGURE 478. Scatter plot on the first two principal component axis of morphometric data for taxa within Gedaniella. 80% variations of each species are encircled by an ellipse.
FIGURES 420–424 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 420–424. Scanning electron micrographs of Serratifera parkii (culture HK507). Fig. 420. External view, showing narrowly-linear sternum and each stria constituted by single round areola on both valve face and mantle. Fig. 421. Internal view, showing the absence of rimoportulae. Fig. 422. Oblique valve, showing the swelling (indicated by arrowhead) of the base associated with marginal spines. Fig. 423. A copula, showing fringed structures (indicated by arrowhead) observed at the margin of copula. Fig. 424. Plain and open copulae.
FIGURES 405–412 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 405–412. Scanning electron micrographs of Serratifera namibica (culture SZCZP88 and wild material). Fig. 405. Girdle view of a frustule, showing one row of areolae located on mantle. Figs 406–409. External views, showing narrowly-linear sternum and striae consisting of single, sometimes double row of areola (fig. 406) on valve face and one areola on mantle. Fig. 410. Internal view, showing the absence of rimoportulae. Fig. 411. External valve of a small specimen, showing areolae occluded by complex volae, projecting from transapical side of areolae. Fig. 412. A frustule, showing plain copulae, and fringed structure (indicated by arrowhead) observed at the margin of copula. Figs 406–409, 412. Wild material from Sandwich Harbour, Namibia.
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.
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