A review of Silurian brachiopods from Gotland

The Silurian articulate brachiopods of Gotland, Sweden, are reviewed, and the many species described since the late eighteenth century are assigned where necessary to more appropriate genera; many of the available specific names are synonymised. Lectotypes are selected for a large number of the species, and many are figured, particularly those from collections described originally by Hisinger, Dalman, de Verneuil, and Lindström which have been rediscovered recently. A neotype for Conchidium biloculare (Hisinger ) is also selected. The following new taxa are described: Valdaria testudo gen. et sp. nov., Hesperorthis martinssoni sp. nov., and Spinatrypina tubulosa sp. nov., while the poorly known species Hesperorthis gotlandiea (Schuchert & Cooper ), Megastrophia walmstedti (Lindström), Morinorhynchus crispus (Lindström), Morinorhynchus adnatus (Hedström) and Eocoelia angelini (Lindström) are redescribed fully. Several longstanding bibliographical problems are discussed. A short stratigraphical review includes the new record of riccartonensis Zone graptolites from the Högklint Beds.