ORDOVICIAN BRACHIOPODA FROM THE 

 SHELVE DISTRICT, SHROPSHIRE 



By ALWYN WILLIAMS 



CONTENTS 











Page 



I. Introduction ....... . 8 



II. Faunal distribution 











9 



III. Faunal associations 











16 



IV. Systematic methods 











23 



V. Systematic palaeontology . 











25 



Class INARTICULATA Huxley 











25 



Order Lingulida Waagen . 











25 



Superfamily Lingulacea Menke 











25 



Family Obolidae King 











25 



Subfamily Obolinae King 











25 



Obolus Eichwald . 











25 



Obolus subditivus sp. nov. 











25 



Obolus sp. 











26 



Schmidtites Schuchert & Le Vene 









26 



Schmidtites ? simplex sp. nov. 









26 



Schmidtites ? simplex subcircularis sp. e 



t subsp. no> 



T. 



27 



Subfamily Lingulellinae Schuchert 







28 



Lingulella Salter .... 







28 



Lingulella displosa sp. nov. . 







28 



Lingulella displosa petila sp. et subsp. i 



lOV. . 





29 



Palaeoglossa Cockerell . 







31 



Palaeoglossa attenuata Sowerby . 







32 



Palaeoglossa myttonensis sp. nov. . 







33 



Subfamily Glossellinae Cooper 







35 



Pseudolingula Mickwitz 







35 



Pseudolingula spatula sp. nov. 







36 



Family Elkaniidae Walcott & Schuchert 







38 



Monobolina Salter 







38 



Monobolina plumbea (Salter) 







38 



Family Paterulidae Cooper 







40 



Paterula Barrande 







40 



Paterula cf. bohemica Barrande . 







40 



Paterula cf. perfecta Cooper 







4i 



Order Acrotretida Kuhn . 







42 



Suborder Acrotretidina Kuhn . 







42 



Superfamily Acrotretacea Schuchert . 







42 



Family Acrotretidae Schuchert 







42 



Apsotreta Palmer 







42 



Apsotreta sp. .... 







42 



Conotreta Walcott 







43 



Conotreta stapeleyensis sp. nov. 







43 



Superfamily Discinacea Gray 











44 



