Phylogenetic reconstructions are still lacking for many molluscan groups, making evolutionary inferences much weaker. The genera Cotonopsis Olsson, 1942 and Cosmioconcha Dall, 1913 are part of the so called Strombina group, and as such have been used as models to study patterns of speciation and extinction brought about by the rise of the Central American gateway. Earlier work, based on a few s...

Indothais blanfordi (Melvill, 1893), a muricid gastropod is being reported for the first time from Machilipatnam (16o 8′ 42.82′′ N and 81o 10′ 41.83′′ E) in Andhra Pradesh State situated on the northern east coast of India. This species was earlier recorded from Kalpakkam on the southern east coast, but not brought to light as first record to the east coast of India. Nevertheless, its occurrenc...