Article: Some Wenlockian fenestrate Bryozoa

Fenestella rigidula M'Coy 1850 and F. lineata Shrubsole 1880 are considered to be conspecific. Their zooecial chambers are shown to contain structures comparable with the diaphragms of the Trepostomata, and a new genus, Archaeofewstella, is erected to contain them. One new species and two new subspecies are described: Archaeofenestella rigidula polynodosa, Fenestella pseudosubantiqua, and F. pseudosubantiqua catrionae. Elias's (1956) suggestion of the presence, in the English Wenlockian, of d'Orbigny's genus Reteporina from the Devonian is confirmed. A new genus, Neoreteporina, is proposed for certain Carboniferous species described by Nekhoro-shev. Finally the polyphyletic nature of the genus Fenestella is suggested.