Rowellella sp.
publication ID |
https://doi.org/ 10.13140/rg.2.1.3543.9120 |
persistent identifier |
https://treatment.plazi.org/id/FB5C1130-FFB9-5932-FCB4-D32B0946FA82 |
treatment provided by |
Felipe |
scientific name |
Rowellella sp. |
status |
|
Fig. 1M–O View Fig .
Material.—Total of 1 dorsal valve and 2 indeterminate valves. Figured dorsal valve: RM Br133763 (W = 0.66, L = 1.10); indeterminate valve: RM Br133764.
Remarks.—The fragmentary preservation of the scant material makes exact taxonomic discrimination difficult. Biernat (1973) distinguished two unnamed species, based on differences in shape and size, but this cannot be confirmed based on the available material. The surface ornamentation consists of ridge−like fila, superposed on growth lamellae, but the typical pitted micro−ornamentation of Rowellella is not present presumably due to poor preservation. Popov and Holmer (1994) described similarly poorly preserved material of Rowellella from the Tremadoc of Sweden, as well as from the early Arenig of Kirgizia (Holmer et al. 2000). Some similar and poorly preserved specimens of Rowellella were also described by Bednarczyk (1986) from early Arenigian beds in northern Poland.
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