Query: classification: "42.73"
|Title||Olssoνella Scalatella (Guppy) living off northern South America (Mollusca: Neogastropoda: Cancellariidae)|
|Keywords||Mollusca; Cancellariidae; Olssonella; South America|
|Abstract||Olssonella scalatella (Guppy, 1873), originally described from early Pliocene deposits in Jamaica, still occurs as a recent species off the northern coast of S. America. This opinion is based on shells collected off Surinam and French Guyana, fossil specimens from the type-locality, and data from the literature. O. smithii (Dall, 1888) is considered a closely related recent species, occurring more to the north; it differs from O. scalatella mainly in characters of the protoconch.|
Conchological characters of the two taxa are discussed and some general notes are given concerning the importance of protoconch characters.
|Download paper|| http://www.repository.naturalis.nl/document/149451 |