MARANTACEAE IN SULAWESI

ARDIYANI, M., POULSEN, A. D., SUKSATHAN, P., BORCHSENIUS, F. 2010. Marantaceae in Sulawesi. Reinwardtia 13(2): 213-220. - Six species of Marantaceae occur in Sulawesi. We present a key to the species together with a taxonomic treatment with notes on species delimitation, distribution, habitat and ecology, vernacular names and uses. One species endemic to Sulawesi and not covered by any contemporary publication, Phrynium longispicum (Warb. ex K. Schum.) Suksathan & Borchs. is described and neotypified. Donax canniformis (G. Forst.) K. Schum., Phrynium pubinerve Blume, Phrynium robinsonii (Valeton) Suksathan & Borchs, Stachyphrynium latifolium (Blume) K. Schum. and Stachyphrynium repens (Korn.) Suksathan & Borchs. are also reported from Sulawesi and characterized. For the two last species these occurrences represents an extension of their previously known range across Wallace's line

Quaternion-Octonion Analyticity for Abelian and Non-Abelian Gauge Theories of Dyons

Einstein- Schroedinger (ES) non-symmetric theory has been extended to accommodate the Abelian and non-Abelian gauge theories of dyons in terms of the quaternion-octonion metric realization. Corresponding covariant derivatives for complex, quaternion and octonion spaces in internal gauge groups are shown to describe the consistent field equations and generalized Dirac equation of dyons. It is also shown that quaternion and octonion representations extend the so-called unified theory of gravitation and electromagnetism to the Yang-Mill's fields leading to two SU(2) gauge theories of internal spaces due to the presence of electric and magnetic charges on dyons

Taxonomic revision of Myrosma (Marantaceae)

Myrosma is a genus of rosulate herbs characterized by a compact and strongly monosymmetric inflorescence with conspicuous, white to pale green, mostly membranous bracts, in the axil of which is a single flower pair. The genus is widely distributed throughout Central Brazil, northern South America, and the Caribbean region. It occurs mostly in savannah environments but can also be found in humid and shaded habitats. We present a taxonomic revision of Myrosma recognizing a single species, Myrosma cannifolia L.f. A complete description of that species is provided with notes on its ecology, distribution, and variation. Three species and one variety are reduced into synonymy and four names are lectotypified. A complete nomenclatural account for all combinations including the name Myrosma is given

Phylogeny of the pan-tropical family Marantaceae

Phylogenetic resolution of problematic taxonomic groups can be improved and strengthened by increasing the amount of molecular data and the sampling of ingroup taxa. Here we reassess the phylogeny of the pantropically distributed family Marantaceae compiling a complete genera sampling and using both chloroplast and nuclear markers. Phylogenetic analyses were conducted on a set of four genetic markers (chloroplast markers: trnL, matK, rps16 and nuclear marker: ITS) for 187 ingroup taxa representing all 29 Marantaceae genera under Maximum Likelihood (ML), Maximum parsimony (MP) criteria and Bayesian Inference (BI). The resulting tree topology focusing on the resolution of major clades was mostly congruent among applied methods and with preexisting family phylogenies. A few relationships within genera or clades were newly resolved here. A genus, Monophyllanthe, added to the phylogeny here for the first time appeared within the Stachyphrynium clade as sister to the genus Marantochloa. Only the affinity of the genus Haumania to one of the other major clades still remained uncertain. Four genera, Calathea, Ischnosiphon, Maranta and Schumannianthus were identified as being non-monophyletic. Such a robust phylogeny based on multiple molecular markers from both genomes and a complete sampling of Marantaceae genera will be a solid base to investigate in the future the timing of speciation and the migration events leading to the currently observed biogeographical patterns in this family.Peer reviewe