Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . Fig. 7. SAM-10569 Proplacenticeras merenskyi (Haughton). Holotype; X 1. (Wright 1957: L390), but may occur as early as the Upper Albian (see Collignon1963: 126). Rhynchostreon is generally restricted to the Cenomanianand Turonian(Stenzel 1971: Nl 123-4). It is suspected, however, that typical forms of , such as these found near Bogenfels, are restricted to the Earlyand Middle Cenomanian throughout the world. As Haughton states that theP. merenskyi specimen was found in the Rhynchostreon bed, the possib
Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . Fig. 7. SAM-10569 Proplacenticeras merenskyi (Haughton). Holotype; X 1. (Wright 1957: L390), but may occur as early as the Upper Albian (see Collignon1963: 126). Rhynchostreon is generally restricted to the Cenomanianand Turonian(Stenzel 1971: Nl 123-4). It is suspected, however, that typical forms of , such as these found near Bogenfels, are restricted to the Earlyand Middle Cenomanian throughout the world. As Haughton states that theP. merenskyi specimen was found in the Rhynchostreon bed, the possibility thatmore than one age is represented may be excluded. The concurrent range zoneof these two species thus suggests a Cenomanian age for the Rhynchostreon shellbeds near Bogenfels. 90 ANNALS OF THE SOUTH AFRICAN MUSEUM.
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Keywords: ., bookcentury1800, bookdecade1890, booki, booksubjectnaturalhistory
