New anaspid material from the Late Silurian of Britain and Estonia
2004
Miller, C.G.(Natural History Museum, London (United Kingdom). Dept. of Palaeontology)E-mail:[email protected] | Märss, T.(Tallinn Univ. of Technology (Estonia). Inst. of Geology)E-mail:[email protected] | Blom, H.(Uppsala University (Sweden). Dept. of Physiology and Developmental Biology. Evolutionary Organismal Biology)E-mail:[email protected]
A new birkeniid anaspid Trimpleylepis juncta gen. et sp. nov. is described from the Pridoli, late Silurian at Man Brook, Welsh Borderland. Trimpleylepis concatenata gen. et sp. nov. is described from the Ohesaare Borehole, Ludlow, Silurian of Estonia. Histological sections show that Trimpleylepis has similar features to material previously described from the family Septentrioniidae Blom, Maerss and Miller, 2002. However, vascular canals have not been seen in sections of either species, and rare openings of canals have only been seen on one or two specimens of T.concatenata, so assignment to this family is tentative. Silmalepis cf. erinacea has been identified from Man Silurian of Gardner's Bank, Welsh Borderland suggests that anaspids from the Family Rhyncholepidae Kiaer, 1924 were present from the mid Wenlock to the late Pridoli.
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