GB3D Type Fossils

Kingdom Animalia

  Phylum Brachiopoda

    Class Rhynchonellata

      Order Orthida

Heterorthis retrorsistria (McCoy), 1851: Lectotype

Orthis retrorsistria McCoy

Orthis retrorsistria McCoy

Orthis alternata Sowerby, J. de C.

Orthis alternata var. retrorsistria McCoy

Orthis retrorsistria McCoy: Syntype

Orthis retrorsistria McCoy

Longvillian Substage (Ordovician Period) – Soudleyan Substage (Ordovician Period) (452.75 – 455.25 Ma B.P.)

[Closest ICS interval: Katian Age – Sandbian Age ]

Cocks, L.R.M. 1978. A review of British Lower Palaeozoic Brachiopods, including a synoptic revision of Davidson's monograph Palaeontographical Society Monographs (7): pp.73,196,215

Davidson 1869 d. British fossil Brachiopoda Palaeontographical Society Monographs iii part vii (3): p.265 pl. xxvi fig.40 McCoy's fig. copied

Davidson 1883. British fossil Brachiopoda Palaeontographical Society Monographs vol. v (5): p.185 pl. xiv fig.13

McCoy 1851 c. Annals and Magazine of Natural History ser. (2) vol. viii (1): p.396

McCoy 1852 a. A synopsis of the classification of the British Palaeozoic rocks with a systematic description of the British Palaeozoic fossils Palaeontographical Society Monographs (2): pp.224, 370 pl.1 h fig.13

McCoy 1854 a. Contributions to British Palaeontology (1): p.218

Salter 1873. Catalogue of the Cambrian and Silurian fossils contained in the Geological Museum of the University of Cambridge (4): p.60 McCoy's fig. referred

Woods, H. 1891. Catalogue of the Type Fossils in the Woodwardian Museum, Cambridge. Henry Woods with preface by T. McKenny Hughes CUP. 180+xiv SPL: II. 16 (6): p.57