|
Mennerius Asymmetricus
''Mennerius'' is a genus of haptophytes belonging to the family Lapideacassaceae. Diagnosis The genus accommodates ‘bell-shaped’ to cylindrical nannoliths with their body consisting of one or more tiers of vertically elongated calcite plates and a rounded or somewhat pointed apical cone. One or more apical spines are often also present. The cross section of the body is round to polygonal. Species *''Mennerius asymmetricus, M. asymmetricus'' (Perch-Nielsen in Perch-Nielsen & Franz, 1977) *''Mennerius bispinosus, M. bispinosus'' (Perch-Nielsen in Perch-Nielsen & Franz, 1977) *''Mennerius blackii, M. blackii'' (Perch-Nielsen in Perch-Nielsen & Franz, 1977) *''Mennerius cornutus, M. cornutus'' (Forchheimer & Stradner, 1973) *''Mennerius glans, M. glans'' (Black, 1971) *''Mennerius longus, M. longus'' Luljeva, 1967 *''Mennerius magnificus, M. magnificus'' (Perch-Nielsen in Perch-Nielsen & Franz, 1977) *''Mennerius mariae, M. mariae'' (Black, 1971) *''Mennerius morosus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eukaryota
The eukaryotes ( ) constitute the Domain (biology), domain of Eukaryota or Eukarya, organisms whose Cell (biology), cells have a membrane-bound cell nucleus, nucleus. All animals, plants, Fungus, fungi, seaweeds, and many unicellular organisms are eukaryotes. They constitute a major group of Outline of life forms, life forms alongside the two groups of prokaryotes: the Bacteria and the Archaea. Eukaryotes represent a small minority of the number of organisms, but given their generally much larger size, their collective global biomass is much larger than that of prokaryotes. The eukaryotes emerged within the archaeal Kingdom (biology), kingdom Asgard (Archaea), Promethearchaeati and its sole phylum Promethearchaeota. This implies that there are only Two-domain system, two domains of life, Bacteria and Archaea, with eukaryotes incorporated among the Archaea. Eukaryotes first emerged during the Paleoproterozoic, likely as Flagellated cell, flagellated cells. The leading evolutiona ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
