Ufimia sp.
publication ID |
https://doi.org/ 10.1186/s13358-023-00296-0 |
DOI |
https://doi.org/10.5281/zenodo.12783874 |
persistent identifier |
https://treatment.plazi.org/id/49386916-7F00-FFE1-FF2B-FD33FDD4F8EE |
treatment provided by |
Felipe |
scientific name |
Ufimia sp. |
status |
|
( Fig. 13A View Fig 1–A View Fig 3 View Fig ).
Material: Two corallites (RAh 101 and RAh 114), with four transverse thin-sections; collected from the basal shales of lower member of the Aheimer Formation.
Description: External characters: Straight, conical corallites, the preserved part of both range in length from 1.5 to 2 cm. The calices are eroded, and the apical parts are not preserved. The external wall does not show any septal furrows ( Fig. 13A View Fig 1 View Fig ).
Internal characters: There are 20 major septa in a diameter of 5.5 mm ( Fig. 13A View Fig 2 View Fig ), they are all very thick, the longest of them reach the corallite axis with rhopaloid ends. The corallite lumen is filled with stereoplasm. Below the calice there are still 20 major septa in a diameter of 7 mm ( Fig. 13A View Fig 3 View Fig ). Major septa are thick, rhopaloid, withdrawn a little from the centre which is largely filled with stereoplasm. At this stage of maturity, the cardinal septum becomes shorter and thinner towards the centre within indistinct fossula in contrast to the other major septa. The counter septum also becomes shorter than the counter-laterals. The alar septa exceed the major septa in length and in thickness. Septa are strongly accelerated in number in counter quadrants. Tabulae are not observed in transverse sections. Minor septa are underdeveloped.
Discussion: Ufimia alternans from the upper Moscovian of Spain differs from the current species in the following:
• Ufimia alternans de Groot, 1963 is larger than the current species; The Spanish species reaches max. 24: 13 mm vs. 20: 7 mm in the Egyptian species.
• The biform tabularium of the Spanish species is not expressed in the current species.
• The Spanish species is characterised by the alternation of long and short major septa, a feature that is not found in the Egyptian Ufimia .
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