... at the very top of the Gerster Limestone ( Wardlaw and Collinson, 1986 ), originally reported as Merrilina divergens . Based on Merrilina praedivergens , the age of the uppermost Gerster Limestone is late Wordian (Guadalupian). Type species—Dybowskiella grandis Waagen and Wentzel, 1886 ; Guadalupian...

... be remembered that at the time of Spath's writing the only beds from which a "Produc- tus" could have been derived were regarded as Lower Carboniferous , according to Koch. Koch (1931, p. 79), listed Productus spines and fragments, together with Synocladia, Acanthocladia?, Fenestella, and Stenopora as members...

... . Koskinotextularia , Ko . Koninckopora , L. Lituotubella , N. Neoarchaediscus , O . Omphalotis , P . Pojarkovella , Pa. Paraarchaediscus , Ps. Pseudoendothyra . A nomenclature developed for the Horton in Ribblesdale and Settle areas comprising, in ascending order, ‘ Michelinia grandis Beds...

... recognized but not covered here include: Fistulipora, ? Fistulamina, Dybowskiella, Dyscritellina, Pseudobatostomella, Stenopora, ? Rhombopora, ? Streblotrypa, Nematopora, Polyporella, and Parapolypora. Hayasakapora cf. erectoradiata, Pamirella oculus, and Tabulipora colvillensis...

... Dentalina labiata Ammodiscus incertus Dentalina sp. Ammodiscus sp. Spandelinoides striatoclavata Palaeobigenerina sp. Trepeilopsis grandis Frondicularia woodwardi Calcitornella stephensi Frondicularia sp. Stacheia marginulinoides Ruditaxis rudis Stacheia...