Morinorhynchus Havliček, 1965

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 : 474

Genus Morinorhynchus Havliček, 1965

Remarks.—The type species of the genus is M. dalmanelliformis Havliček, 1965 , from the Ludlow of Bohemia. The genus differs from Coolinia in having a large pseudodeltidium and a small or even absent pair of chilidial plates, in contrast to the latter whose delthyrium is filled by only a vestigial pseudodeltidium (or deltidial plates) and a large chilidium. From Baltica are recorded the species Morinorhynchus adnatus ( Hedström, 1917) , whose type locality is in the Wenlock Halla Beds of Gotland, revised by Bassett and Cocks (1974: 21), Morinorhynchus crispus ( Lindström, 1861) , whose type locality is in the Ludlow Hemse Beds of Gotland, revised by Bassett and Cocks (1974: 20), and which is also recorded from the Ludlow of Podolia by Nikiforova et al. (1985: 26), and Morinorhynchus wieniukowi ( Kozłowski, 1929) , whose type locality is in the Pridoli Rashkov Beds of the Skala Horizon of Podolia, and which was revised by Nikiforova et al. (1985: 26). From the Upper Wenlock of the Welsh Borderland, England, Morinorhynchus orbignyi ( Davidson, 1848) is known: this species was revised by Bassett (1974: 98), but is not known from Baltica. M. crispus and M. wieniukowi (Kozłowski) , both revised by Nikiforova et al. (1985), occur in the Ludlow and Pridoli of Podolia. Morinorhynchus cf. dalmanelliformis Havliček, 1965 was recorded by Sapelnikov et al. (1975: 9, pl. 1: 1–4) and Sapelnikov and Mizens (1991: 94, pl. 38: 1–4) from the Lower Pridoli of the eastern slope of the northern Urals, but we have not revised those records here.