A new species of Trochita (Gastropoda: Calyptraeidae) from Oman: a relict distribution and association with upwelling areas

Submitted by admin on Sun, 20/11/2011 18:55
JOHN D. TAYLOR
KATHLEEN R. SMYTHE
(1985)
Volume
32
Part
1
Page from
39

A new species of the calyptraeid gastropod Trochita is described from southern Oman. The species lives limpet-like, upon exposed rocky headlands, in an area strongly influenced by cold upwelling waters. Trochita dhofarensts is most similar to the mainly West American T. trochiformis and T. spirata. A Miocene distribution pattern disrupted by the closure of the Mediterranean/Indian Ocean seaway is the most parsimonious explanation of the disjunct distribution pattern. Trochita species appear to be associated with cold upwelling current systems in the Atlantic, Pacific, Indian and Southern Oceans.