Iberopora bodeuri GRANIER & BERTHOU 2002 (incertae sedis) from the Plassen Formation (Kimmeridgian–Berriasian) of the Tethyan Realm
Iberopora bodeuri GRANIER & BERTHOU 2002 (incertae sedis) from the Plassen Formation (Kimmeridgian–Berriasian) of the Tethyan Realm
复制标题
Iberopora bodeuri GRANIER & BERTHOU 2002 (incertae sedis) 来自特提斯域 Plassen 组 (Kimmeridgian-Berriasian)
作者：
F. Schlagintweit
Iberopora bodeuri GRANIER & BERTHOU 2002，原名“crust problematicum”（SCHMID，1996），描述于北石灰质阿尔卑斯山（NCA）的普拉森组（Kimmeridgian-Berriasian）。在这里，它要么以硬壳状瘤珊瑚/层孔珊瑚的形式出现，要么形成结节状团块（“solenoporoidmorphotype”）。它通常发现于台地边缘的礁前相和（上）斜坡沉积物中，在那里没有原生的粗枝藻。水流紊动控制了Iberopora的形态发育。因此，在不太激动的环境中，会出现扁平的结壳。结壳几乎总是伴随着钙质海绵/硬海绵和丰富的微结壳，主要是Koskinobullinasocialis CHERCHI & SCHROEDER和“Tubiphytes”morronensis CRESCENTI。目前已知的伊贝罗波拉的地层范围是牛津-贝里阿斯阶。除北方石灰质阿尔卑斯山脉外，德国西北部陆缘地区、宾夕法尼亚洋和特提斯洋的北方边缘（斯洛伐克、瑞士、西班牙、波兰、葡萄牙）和特提斯洋南部（希腊、罗马尼亚、南斯拉夫）也有分布。在发现其它形态学成分（如生殖器官或原贝壳）之前，其系统位置尚不确定。目前，它被怀疑是一个古老的红藻纲或堆形类有孔虫。
Iberopora bodeuri GRANIER & BERTHOU 2002, formerly knownas “crust problematicum” (SCHMID, 1996) is described from thePlassen Formation (Kimmeridgian–Berriasian) of the NorthernCalcareous Alps (NCA). Here, it occurs either as an incrustation oncorals/stromatoporoids or it forms nodular masses (“solenoporoidmorphotype”). It is typically found in the fore-reef facies of theplatform margin, and (upper) slope deposits where autochthonousdasycladales are absent. Water turbulence appears to control themorphological development of Iberopora. Thus, flat crusts appear inless agitated settings. The crusts are almost always accompanied bycalcareous sponges/sclerosponges and abundant micro-encrusters,mostly Koskinobullina socialis CHERCHI & SCHROEDER and“Tubiphytes” morronensis CRESCENTI. The stratigraphic rangeof Iberopora known to date is Oxfordian–Berriasian. In additionto the Northern Calcareous Alps, it has been reported from theepicontinental area of NW-Germany, the northern margin of thePenninic and Tethyan ocean (Slovakia, Switzerland, Spain, Poland,Portugal) and the southern Tethyan domain (Greece, Romania,Yugoslavia). Until other morphological elements (e.g. reproductiveorgans or protoconch) are found, its systematic position remainsuncertain. Currently, it is considered questionably to be an ancestralrhodophyceae or acervulinid-like foraminifera.