Browse > Article

Two new species of Pseudostaurosiropsis (Bacillariophyta, Fragilariophyceae) from the United States of America, with taxonomic comments on the genus  

Morales, Eduardo A. (Water Laboratory, University of Evora)
Publication Information
ALGAE / v.37, no.1, 2022 , pp. 33-47 More about this Journal
Two new species of Pseudostaurosiropsis are described based on material collected from rivers in southern United States of America, P. californicus sp. nov. and P. elaboratus sp. nov. Both species have specific characters that set them apart from taxa currently ascribed to the genus. Pseudostaurosiropsis californicus sp. nov. has lanceolate valves with subrostrate, broadly rounded apices, an axial area at the same level as the virgae in internal and external views and both are at the same level as striae in external view, the spine tips are dentate and their growth is produced by filamentous extensions, and it has equal-sized apical pore fields on both valve extremes. On the other hand, P. elaboratus sp. nov. has heavily silicified valves, the virgae are slender than the striae in outer view and wider in inner view, it only has a single, externally occluded apical pore field on one valve extreme, and the spines have a solid core. All species within Pseudostaurosiropsis are contrasted with one another and unique features are described for each based on literature and newly collected image data from type material. The genus is reconsidered and two distinguishing features are recognized: rotae externally occluding the areolae and areolae that are funnel-shaped. These features are contrasted with those in other genera and additional published species that should be included in Pseudostaurosiropsis are discussed.
araphid; fragilarioid diatoms; morphology; Pseudostaurosiropsis; taxonomy;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Anonymous. 1975. Proposals for a standardization of diatom terminology and diagnoses. Nova Hedwigia Beih. 53:323-354.
2 Almeida, P. D., Wetzel, C. E., Morales, E. A., Ector, L. & Bicudo, D. C. 2017. New species and combinations on Fragilariforma (Bacillariophyta) from tropical freshwater environments. Fottea 17:277-292.   DOI
3 Barber, H. G. & Haworth, E. Y. 1981. A guide to the morphology of the diatom frustule with a key to the British freshwater genera. Sci. Publ. Freshw. Biol. Assoc. Ambleside 44:1-112.
4 Beauger, A., Wetzel, C. E., Voldoire, O. & Ector, L. 2018. Pseudostaurosira bardii (Fragilariaceae, Bacillariophyta), a new species from a saline hydrothermal spring of the Massif Central (France). Bot. Lett. 166:3-13.   DOI
5 Charles, D. F., Knowles, C. & Davis, R. S. 2002. Protocols for the analysis of algal samples collected as part of the U.S. Geological Survey National Water-Quality Assessment Program. Report No. 02-06. The Academy of Natural Sciences, Patrick Center for Environmental Research-Phycology Section, Philadelphia, PA, 124 pp.
6 Fayo, R., Espinosa, M. A. & Isla, F. I. 2020. Holocene diatoms from the Colorado River delta, Argentina: a paleoenvironmental approach from the study of "small fragilarioids". Rev. Bras. Paleontol. 23:209-211.   DOI
7 Garcia, M. L., Bustos, S., Villacis, L. A., Laprida, C., Mayr, C., Moreno, P. I., Maidana, N. I. & Morales, E. A. 2021. New araphid species of the genus Pseudostaurosira (Bacillariophyceae) from southern Patagonia. Eur. J. Phycol. 56:255-272.   DOI
8 Grana, L., Morales, E. A., Maidana, N. I. & Ector, L. 2018. Two new species of Staurosira and Pseudostaurosira (Bacillariophyta) from the highlands of Argentina (south-central Andes) and two new nomenclatural combinations. Phytotaxa 365:60-72.   DOI
9 Hegewald, E. & Silva, P. C. 1988. An annotated catalogue of Scenedesmus and nomenclaturally related genera including original descriptions and figures. Bibl. Phycol. 80:1-587.
10 Van Dam, H., Mertens, A. & Sinkeldam, J. 1994. A coded checklist and ecological indicator values of freshwater diatoms from the Netherlands. Neth. J. Aquat. Ecol. 28:117-133.   DOI
11 Marquardt, G. C., Bicudo, D. C., Bicudo, C. D. M., Ledru, M. -P., Ector, L. & Wetzel, C. E. 2021. Pseudostaurosira crateri sp. nov. (Fragilariaceae, Bacillariophyta), a new small araphid, fossil diatom species from the Pleistocene (Atlantic Forest, Brazil). Phytotaxa 496:105-120.   DOI
12 Morales, E. A., Wetzel, C. E., Haworth, E. Y. & Ector, L. 2019a. Ending a 175-year taxonomic uncertainty: description of Staurosirella neopinnata sp. nov. (Bacillariophyta) to accommodate Fragilaria pinnata, a highly misconstrued taxon with a purported worldwide distribution. Phytotaxa 402:75-87.   DOI
13 Wetzel, C. E. & Ector, L. 2021. Two new Punctastriata (Bacillariophyta) species from subalpine French lakes. Bot. Lett. 168:42-55.   DOI
14 Williams, D. M. & Round, F. E. 1988 ("1987"). Revision of the genus Fragilaria. Diatom Res. 2:267-288.   DOI
15 Witkowski, A., Lange-Bertalot, H. & Witak, M. 1995. Diatom taxa of unusual frustule structure belonging to the genus Fragilaria. Frag. Flor. Geobot. 40:729-741.
16 Seddon, A. W. R., Witkowski, A., Froyd, C. A., Kurzydlowski, K. J., Grzonka, J. & Willis, K. J. 2016. Diatoms from isolated island II: Pseudostaurosira diablarum, a new species from a mangrove ecosystem in the Galapagos Islands. Diatom Res. 29:201-211.
17 Morales, E. A., Novais, M. H., Chavez, G., Hoffmann, L. & Ector, L. 2012. Diatoms (Bacillariophyceae) from the Bolivian Altiplano: three new araphid species from the Desaguadero River draining Lake Titicaca. Fottea 12:41-58.   DOI
18 Morales, E. A., Wetzel, C. E., Novais, M. H., Buczko, K., Morais, M. M. & Ector, L. 2019b. Morphological reconsideration of the araphid genus Pseudostaurosira (Bacillariophyceae), a revision of Gedaniella, Popovskayella and Serratifera, and a description of a new Nanofrustulum species. Plant Ecol. Evol. 152:262-284.   DOI
19 Li, C. L., Witkowski, A., Ashworth, M. P., Dabek, P., Sato, S., Zglobicka, I., Witak, M., Khim, J. S. & Kwon, C. -J. 2018. 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. Phytotaxa 355:1-104.   DOI
20 Luo, F., You, Q. -M., Yu, P., Cao, Y. & Wang, Q. -X. 2019. Taxonomy of Staurosiraceae (Bacillariophyta) from Mugewo, Sichuan Province, China. Acta Hidrobiol. Sin. 43:910-922.
21 Marsicano, L. J. & Siver, P. A. 1993. A paleolimnological assessment of lake acidification in five Connecticut Lakes. J. Paleolimnol. 9:209-221.   DOI
22 Morales, E. A. 2001. Morphological studies in selected fragilarioid diatoms (Bacillariophyceae) from Connecticut waters (U.S.A.). Proc. Acad. Nat. Sci. Phil. 151:105-120.   DOI
23 Battarbee, R. W. 1986. Diatom analysis. In Berglund, B. (Ed.) Handbook of Holocene Paleoecology and Palaeohydrology. John Wiley & Sons, Hoboken, NJ, pp. 527-570.
24 Morales, E. A., Wetzel, C. E., Rivera, S. F., Van de Vijver, B. & Ector, L. 2014. Current taxonomic studies on the diatom flora (Bacillariophyceae) of the Bolivian Altiplano, South America, with possible consequences for palaeoecological assessments. J. Micropalaeontol. 33:121-129.   DOI
25 Morales, E. A., Wetzel, C. E., Van de Vijver, B. & Ector, L. 2015. Morphological studies on type material of widely cited araphid diatoms (Bacillariophyta). Phycologia 54:455-470.   DOI
26 Grana, L., Morales, E. A., Besta, T., Echazu, D., Wetzel, C. E., Novais, M. H., Rajdlova, H., Ector, L. & Maidana, N. I. 2015. On the geographical distribution and ecology of Pseudostaurosira cataractarum (Bacillariophyceae): new findings in the Palearctic and Neotropic ecozones. Braz. J. Bot. 38:809-821.   DOI
27 Morales, E. A. & Manoylov, K. M. 2006. Staurosirella incognita Morales et Manoylov sp. nov., a non-spiny species from North America, with an emended description of Staurosirella Williams et Round (Bacillariophyceae). In Witkowski, A. (Ed.) Proc. 18th Int. Diatom Symp., Biopress Limited, Bristol, pp. 325-336.
28 Morales, E. A. 2006. Staurosira incerta (Bacillariophyceae) a new fragilarioid taxon from freshwater systems in the United States with comments on the structure of girdle bands in Staurosira Ehrenberg and Staurosirella Williams et Round. In Manoylov, K. & Ognjanova, N. (Eds.) Fossil and Recent Phycological Studies. Dobrina Temniskova-Topalova. Festschrift. Pensoft Publishers and University Publishing House, Sophia, pp. 133-145.
29 Morales, E. A. 2002. Studies in selected fragilarioid diatoms of potential indicator value from Florida (USA) with notes on the genus Opephora Petit (Bacillariophyceae). Limnologica 32:102-113.   DOI
30 Morales, E. A. 2005. Observations of the morphology of some known and new fragilarioid diatoms (Bacillariophyceae) from rivers in the USA. Phycol. Res. 53:113-133.   DOI
31 Benito, X., Trobajo, R. & Ibanez, C. 2015. Benthic diatoms in a Mediterranean delta: ecological indicators and a conductivity transfer function for paleoenvironmental studies. J. Paleolimnol. 54:171-188.   DOI
32 Cejudo-Figueiras, C., Morales, E. A., Wetzel, C. E., Blanco, S., Hoffmann, L. & Ector, L. 2011. Analysis of the type of Fragilaria construens var. subsalina (Bacillariophyceae) and description of two morphologically related taxa from Europe and the United States. Phycologia 50:67-77.   DOI
33 Edlund, M. B., Morales, E. A. & Spaulding, S. A. 2006. The type and taxonomy of Fragilaria elliptica Schumann, a widely misconstrued taxon. In Witkowski, A. (Ed.) Proc. 18th Int. Diatom Symp., Biopress Ltd., Bristol, pp. 53-59.
34 Fitzpatrick, F. A., Waite, I. R., D'Arconte, P. J., Meador, M. R., Mauplin, M. A. & Gurtz, M. E. 1998. Revised Methods for Characterizing Stream Habitat in the National Water-Quality Assessment Program. Report 98-4052. U.S. Geological Survey, Water Resources Investigations, Raleigh, NC, 67 pp.
35 Flower, R. J., Jones, V. J. & Round, F. E. 1996. The distribution and classification of the problematic Fragilaria (virescens v.) exigua Grun./Fragilaria exiguiformis (Grun.) Lange-Bertalot: a new species or a new genus? Diatom Res. 11:41-57.   DOI
36 Novais, M. H., Morales, E. A., Penha, A. M., Potes, M., Bouchez, A., Barthes, A., Costa, M. J., Salgado, R., Santos, J. & Morais, M. 2020. Benthic diatom community dynamics in Mediterranean intermittent streams: effects of water availability and their potential as indicators of dryphase ecological status. Sci. Total Environ. 719:137462.   DOI
37 Grudzinska, I., Saarse, L., Vassiljev, J. & Heinsalu, A. 2014. Biostratigraphy, shoreline changes and origin of the Limnea Sea Lagoons in northern Estonia: the case study of Lake Harku. Baltica 27:15-24.
38 Guerrero, J. M., Garcia, M. L. & Morales, E. A. 2019. Staurosirella andino-patagonica sp. nov. (Bacillariophyta) from lake sediments in Patagonia, Argentina. Phytotaxa 402:131-144.   DOI
39 Kulikovskiy, M. S., Lange-Bertalot, H. & Kuznetsova, I. V. 2015. Lake Baikal: hotspot of endemic diatoms II. Iconogr. Diatomol. 26:1-656.
40 Moulton, S. R. II, Kennen, J. G., Goldstein, R. M. & Hambrook, J. A. 2002. Revised protocols for sampling algal, invertebrate, and fish communities as part of the National Water-Quality Assessment Program. Open-file report 02-150. US Department of the Interior, US Geological Survey, Reston, VA, 75 pp.
41 Radhakrishnan, C., Kulikovskiy, M., Glushchenko, A., Kuznetsova, I. & Karthick, B. 2020. A first finding and morphology of the neglected diatom genus Pseudostaurosiropsis from anthropogenically impacted urban lake in India. Inland Water Biol. 13:170-177.   DOI
42 Talgatti, D., Wetzel, C. E., Morales, E. A., Ector, L. & Torgan, L. C. 2014. Transfer of Fragilaria atomus Hust. to the genus Stauroforma (Bacillariophyta) based on observation of type and newly collected material. Phytotaxa 158:43-56.   DOI
43 Rzodkiewicz, M., Gabka, M., Szpikowska, G. & Woszczyk, M. 2017. Diatom assemblages as indicators of salinity gradients: a case study from a coastal lake. Oceanol. Hydrobiol. Stud. 46:325-339.   DOI
44 Ross, R., Cox, E. J., Karayevia, N. I., Mann, D. G., Paddock, T. B. B., Simonsen, R. & Sims, P. A. 1979. An amended terminology for the siliceous components of the diatom cell. Nova Hedwig. Beih. 64:513-533.
45 Round, F. E., Crawford, R. M. & Mann, D. G. 1990. The diatoms: biology and morphology of the genera. Cambridge University Press, Cambridge, 747 pp.
46 Round, F. E., Hallsteinsen, H. & Paasche, E. 1999. On a previously controversial "fragilarioid" diatom now placed in a new genus Nanofrustrulum. Diatom Res. 14:343-356.   DOI
47 Seddon, A. W. R., Froyd, C. A., Leng, M. J., Milne, G. A. & Willis, K. J. 2011. Ecosystem resilience and threshold response in the Galapagos coastal zone. PLoS ONE 6:e22376.   DOI
48 da Rosa, V. C. & Garcia, M. 2015. Ecological guilds of epiphytic diatoms (Bacillariophyta) on Acrostichum danaeifolium Langst. & Fisch in a subtropical wetland in southern Brazil. Acta Limnol. Bras. 27:311-321.   DOI