GB3D Type Fossils

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Fossil specimen : SM A 41712 – Syntype

Taxonomic Group

Kingdom Animalia

  Phylum Brachiopoda

    Class Rhynchonellata

      Order Orthida

Fossil Name Heterorthis retrorsistria (McCoy), 1851
Type Status Syntype
Name History

Heterorthis retrorsistria (McCoy), 1851

Orthis retrorsistria McCoy

Orthis retrorsistria McCoy

Orthis alternata var. retrorsistria McCoy

Orthis retrorsistria McCoy: Syntype

Orthis retrorsistria McCoy

Registration No. A 41712
Collector Name not available
Donor or Associated Person Name not available
Held By Sedgwick Museum of Earth Sciences Logo Sedgwick Museum of Earth Sciences, University of Cambridge
Country Wales
Locality Pen y Caer, Cerrig y Druidon, Holyhead Road, Denbighshire, Wales
Grid Reference Not available
Rock Unit Bala Flags
Biozone Not available
Geological Age

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. xxxvi figs.39, 42 McCoy's figs. copied

Davidson 1883. British fossil Brachiopoda Palaeontographical Society Monographs vol. v (5): p.185 pl. xiv fig.7

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 figs.12, 12 b

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

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

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