Katastrophomena (Katastrophomena) Cocks, 1968

Musteikis, Petras & Cocks, L. Robin M., 2004, Strophomenide and orthotetide Silurian brachiopods from the Baltic region, with particular reference to Lithuanian boreholes, Acta Palaeontologica Polonica 49 (3), pp. 455-482 : 459

Genus Katastrophomena (Katastrophomena) Cocks, 1968

Remarks.—The type species, Katastrophomena (K.) woodlandensis ( Reed, 1917) , whose type locality is from the Rhuddanian of Girvan, Scotland (then part of Laurentia), was recorded from Baltica by Baarli (1995: 31) from the Rhuddanian Solvik Formation of the Oslo region. Two species, Katastrophomena (K.) penkillensis ( Reed, 1917) , from the upper part of the Rhuddanian Solvik Formation of the Oslo region ( Baarli 1995: 32), and Katastrophomena (K.) scabrosa ( Davidson, 1847) from the Upper Wenlock Slite and Klinteberg formations of Gotland ( Bassett and Cocks 1974; 13), are also recorded from Baltica. Subsequently Bassett (1974: 107) included K. (K.) scabrosa as merely a subspecies of K. antiquata (J. de C. Sowerby, 1839) (but which he incorrectly listed as the type species of the genus), and we follow him here in regarding K. antiquata as the widespread but rather rare species in the Wenlock and early Ludlow of the Baltic, including Lithuania. Nikiforova (1954: 80) identified K. antiquata from the Wenlock and Ludlow of Podolia, and Rubel et al. (1984: 13) recorded Katastrophomena (K.) sp. from the East Baltic area. When individuals are small, they are very difficult to separate from Pentlandina , but we have identified small specimens from the Wenlock of the Graužai−105 borehole (see Appendix) of Lithuania as Katastrophomena (K.) sp. ( Fig. 4G). They occur in the Vilkija Beds of the Paprieniai Formation (Sheinwoodian) in east Lithuania; at the top of the Jūrmala (Telychian) and Gėluva formations (Homerian) in central Lithuania, and the Dubysa Formation (Gorstian) in west Lithuania.