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PAPPAS JANICEL. MORE ON THEORETICAL MORPHOSPACE AND ITS RELATION TO FRESHWATER GOMPHONEMOID-CYMBELLOID DIATOM (BACILLARIOPHYTA) LINEAGES. J BIOL SYST 2011. [DOI: 10.1142/s0218339008002460] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
All forms from hypothesized gomphonemoid-cymbelloid lineages were constructed using three-dimensional (3D) parametric equations with the same boundary intervals for all forms. To construct a theoretical morphospace, the absolute value of the Riemann sum of differences between pairs of forms in terms of surfaces in the x-, y- and z-directions was determined and plotted in 3D space. In general, naviculoid forms occupied the lowest valued morphospace, and cymbelloid and gomphonemoid forms occupied different higher valued morphospaces. In particular, Anomoeoneis, Brebissonia and Placoneis were basal to cymbelloid and gomphonemoid forms. Brebissonia was found to be more closely related to gomphonemoid forms, and Placoneis was found to be more closely related to cymbelloid forms. Reimeria was found to be in lower valued morphospace than other cymbelloid forms, including Encyonema. Didymosphenia was found to be more closely associated with cymbelloid morphospace. Gomphocymbelloid forms were more closely associated with gomphonemoid forms. These results are complementary to the previous study and mostly supported Kociolek and Stoermer's cladistic analysis of gomphonemoid-cymbelloid lineages. In addition, some ideas concerning evolutionary pathways and ontogeny with respect to theoretical morphospaces were explored.
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Affiliation(s)
- JANICE L. PAPPAS
- Museum of Paleontology, University of Michigan, 1109 Geddes Ave., Ann Arbor, MI 48109-1079, USA
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Ramachandra TV, Mahapatra DM, B K, Gordon R. Milking Diatoms for Sustainable Energy: Biochemical Engineering versus Gasoline-Secreting Diatom Solar Panels. Ind Eng Chem Res 2009. [DOI: 10.1021/ie900044j] [Citation(s) in RCA: 151] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- T. V. Ramachandra
- Energy & Wetlands Research Group, Centre for Ecological Sciences/Centre for Sustainable Technologies, Indian Institute of Science, Bangalore 560 012, India
| | - Durga Madhab Mahapatra
- Energy & Wetlands Research Group, Centre for Ecological Sciences/Centre for Sustainable Technologies, Indian Institute of Science, Bangalore 560 012, India
| | - Karthick B
- Energy & Wetlands Research Group, Centre for Ecological Sciences/Centre for Sustainable Technologies, Indian Institute of Science, Bangalore 560 012, India
| | - Richard Gordon
- Department of Radiology, University of Manitoba, Room GA216, HSC, 820 Sherbrook Street, Winnipeg MB R3A 1R9, Canada
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