| Autor: |
Perrigo AL; Department of Biological and Environmental Sciences, University of Gothenburg , Gothenburg, Sweden.; Gothenburg Global Biodiversity Centre , Gothenburg, Sweden., Vadell EM; Escuela de Farmacia and Bioquímica, J. F. Kennedy University Sarmiento 4564 / Museo de Historia Nat. R.S.V. Viamonte 1716 , Buenos Aires, Argentina., Cavender JC; Department of Environmental and Plant Biology, Ohio University , Athens, Ohio 45701., Landolt JC; Department of Biology, Shepherd University , Shepherdstown, West Virginia 25443., Liu P; Engineering Research Center of Edible and Medicinal Fungi, Ministry of Education, Jilin Agricultural University , Changchun 130118, Jilin Province, People's Republic of China., Stephenson SL; Department of Biological Sciences, University of Arkansas, Fayetteville , Arkansas 72701. |
| Abstrakt: |
Dictyostelids are a monophyletic group of sorocarp-forming social amoebae in the major eukaryotic division Amoebozoa. Members of this taxon, which is made up of almost 200 described species, are common in terrestrial soils globally. Still, the alpha diversity is not well known in many areas, and new species are frequently recovered. The highest species richness is found in the tropics. Here, five new species are described from soil samples collected in Madagascar. These species- Cavenderia basinodulosa, C. canoespora, Heterostelium radiatum, H. versatile , and Raperostelium stabile -are described based on both morphological characteristics and molecular data, with sequence data from the rDNA small subunit (SSU). The five new species are morphologically disparate, ranging from relatively small, robust taxa such as R. stabile to taxa with variable morphologies such as the larger H. radiatum and H. versatile and the yellow-tinted and irregularly branched species C. canoespora and C. basinulosa . These new species, together with earlier work where 13 other species were described from the island, suggest that there is a range of genetically diverse and highly morphologically variable dictyostelid taxa occurring on Madagascar, suggesting biogeographic patterns even within these very small organisms. |
