A finding with implications

Fossil shells in the Neotropics are scarce, but very interesting as they can give us a clue about distributions (and possibly habitats) in the past. A study of fossils from the Itaborai basin in eastern Brazil (Salvador et al., 2011), now has lead to the conclusion that Brasilennea species have been wrongly assigned to the Streptaxidae. Instead, they should be placed within the Cerionidae. This family is now occurring in the Caribbean region, and this re-classification sheds a new light on the past distribution of this group. The type species of this genus, B. arethusae Maury, has several characteristics that are more in accordance with cerionids than streptaxids.

Screen_shot_2011-09-19_at_08

Reference:
Salvador, R.B., Rawson, B. & Simone, L.R.L., 2011. Rewriting the fossil history of Cerionidae (Gastropoda, Pulmonata): new family assignment of the Brazilian Palaeocene genus Brasilleannea Maury, 1935. – Journal of Molluscan Studies: 1-3 [published under advance access, doi:10.1093/mollus/eyr021]
Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s