Rowellella sp.

Holmer, Lars E. & Biernat, Gertruda, 2002, Urban and Peri-urban small and medium-size Enterprise Development for sustainable Vegetable Production and Marketing Systems, Acta Palaeontologica Polonica 47 (1), pp. 141-156 : 143-144

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

 

Rowellella sp.

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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