| Título: | Two new Mesodictyopsis species, M. akitaensis sp. nov. and M. miyatanus sp. nov., from a Late Miocene to Pliocene freshwater sediment, Japan |
| Autores: |
Tanaka, Hiroyuki; Maebashi Diatom Institute Nagumo, Tamotsu; Department of Biology, The Nippon Dental University |
| Fecha: | 2009-10-21 |
| Publicador: | Acta Botánica Croática |
| Fuente: |
 |
| Tipo: |
Peer-reviewed Article morphology, new species |
| Tema: | fossil; diatom; Mesodictyopsis; ultrastructure; Lake Tazawa; Miyata Formation; Japan |
| Descripción: | Two new Mesodictyopsis species, M. akitaensis sp. nov. and M. miyatanus sp. nov., are described from freshwater sediment of the Late Miocene to Pliocene Miyata Formation, northern Honshu, Japan. The species are characterized by small size, veluma on inner side of areolae, one fultoportula (sometimes two in M. akitaensis) on central valve face with two (in rare cases three in M. miyatanus) satellite pores, mantle fultoportulae with three satellite pores located on upper mantle close to valve face/mantle junction. Single rimoportula located in a row of areolae on marginal valve face near valve face/mantle junction in M. akitaensis or valve face/mantle junction on a strip in M. miyatanus. The veluma of M. akitaensis are cribra in inner view and sometimes volae on marginal valve face in outer view while those of M. miyatanus are cribra in both inner and outer view. The two species are compared with two similar reported Mesodictyopsis taxa. |
| Idioma: | Inglés |
1 Diatom preservation: differential preservation of sedimentary diatoms in two saline lakes por Flower, Roger J.; Environmental Change Research Centre, University College London,Ryves, David B.; University of Loughborough | 6 A comparative study on the two species of the genus Salvia L. sect. Aethiopis Bentham (Labiatae) from East Anatolia, Turkey por Kahraman, Ahmet; Middle East Technical University, Department of Biological Sciences, 06531 Ankara, Turkey,Dogan, Musa; Middle East Technical University, Department of Biological Sciences, 06531 Ankara, Turkey |
2 Variability of the pennatae diatom Gomphonema ventricosum Gregory from far eastern lakes por Yoshitake, Sakiko; Shonan Junior College,Fukushima, Hiroshi; Institute of Phycology,Kimura, Tsutomu; Institute of Phycology,Lepskaya, Ekatarina V.; Kamchatka Institute for Fisheries Research and Oceanography,Ko-Bayashi, Tuyako; Institute of Phycology | 7 Cytology and palynology of the Clematis L. species (Ranunculaceae) in Iran por Sheidai, Masoud; PROFESSOR,Habibi, Meysam; STUDENT,Azizian, Dina; RETIRED ASSOCIATE PROFESSOR,Khatamsaz, Mahboobeh |
3 Vegetation spatial heterogeneity in a hyper arid Biosphere Reserve area in north Africa por Shaltout, Kamal H.; Botany Department, Faculty of Science, Tanta University, Tanta, Egypt,Sheded, Mohamed Gabr; Professor,Salem, Ashraf I.; National Conservation Sector, Wadi Allaqi Biosphere Reserve, EEAA, Aswan, Egypt | 8 The nutritive value and role of Panicum turgidum Forssk. in the arid ecosystems of the Egyptian desert por Heneidy, Selim Z.; Professor of Plant Ecology,Halmy, Marwa Waseem; Assistant Lecturer |
4 Indirect and direct somatic embryogenesis from aerial stem explants of ginger (Zingiber officinale Rosc.) por Lincy, Adinkudik K.,Remashree, Azhimala B.,Sasikumar, Bhaskaran | 9 Nutlet morphology and its taxonomic utility in Salvia (Lamiaceae: Mentheae) from Turkey por Ozkan, Mustafa,Aktas, Kamuran,Ozdemir, Canan,Guerin, Greg |
5 Unusual thylakoid structures appearing during degradation of the photosynthetic apparatus in chloroplasts por Wrischer, Mercedes; Rudjer Boskovic Institute,Prebeg, Tatjana; Rudjer Boskovic Institute,Magnus, Volker; Rudjer Boskovic Institute,Ljubesic, Nikola; Rudjer Boskovic Institute | 10 Russian wheat aphid causes greater reduction in phloem transport capacity of barley leaves than bird cherry-oat aphid. por Saheed, Sefiu Adekilekun; Department of Botany, Rhodes University, Grahamstown 6140, South Africa; School of Life Sciences, Södertörn University College, S-141 89 Huddinge, Sweden; Department of Botany, Faculty of Science, Obafemi Awolowo University, Ile-Ife 22005, Nigeria,Jonsson, Lisbeth M.V.; School of Life Sciences, Södertörn University College, S-141 89 Huddinge, Sweden,Botha, Christiaan E.J.; Department of Botany, Rhodes University, Grahamstown 6140, South Africa |