|
''Abadehella'' is a large Upper Permian benthic foram in the order Fusulinida. The test is conical, up to 1.35mm at the concave base, coiled trochospirally with up to twenty whorls, each with one and a half to two low chambers surrounding the open umbilicus. Chambers are subdivided by close, evenly spaced radial beams. The test wall is calcareous and two-layered, with an external wall with an outer dark microgranular layer and an inner light fibrous layer, septa and beams with a single micro-granular layer. The aperture from each chamber opens into the umbilical region beneath a short projection. ''Abadahella'' is the sole known genus of the family Abadahellidae, for which the diagnosis is the same. Abadahellidae was established by Loeblich and Tappan 1984; ''Abadahella'' by Okimura and Ishi, 1975. The genus extends across the lowermost member of the Zewan Formation in Kashmir, the Palaeofusulina limestone in Malaysia, the ''Lepidolina multiseptata'' limestone in Cambodia and the ''Lepodlina mustipetata'' and ''Lepidolina kumaensis Zones in Japan. ==See also== * List of prehistoric foraminiferans * Classification of Genus: Abadehella. Global Biodiversity Information Facility Jan 12, 2011 () 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Abadehella」の詳細全文を読む スポンサード リンク
|