01 June 2011

Melampus and its foot

The foot of Melampus coffeus (family Ellobiidae) is divided by a transverse groove into an anterior propodium and a posterior metapodium. The anatomy of its foot is similar to that of its cousin Pedipes. Also, in front of the propodium is the snout with the mouth going thru it.

What is the mechanism of locomotion of Melampus? Lack of time is preventing me from writing more on this interesting topic. But expect more in the future.

This is the 3rd entry in a series of posts about this species. The 1st one was here and the 2nd one was here.


Anonymous said...

Nice shot Aydin! The only Melampus I have found on Nevis is Melampus monile. That species looks the same as the ones you found, but is easy to identify because under magnification you can always see a line of tiny pits on the spire of the shell where hairs once grew. I haven't seen a shot that shows the surface of the spire of your Melampus but I am assuming they don't have that feature.

Susan J. Hewitt


My identification is tentative & will remain so until I figure out how exactly to tell apart M. coffeus from M. bidentatus.

Anonymous said...

The folks at the Smithsonian Marine Station at Fort Pierce give a few pointers on discriminating between those two species, including the fact that "incised spiral lines are present on the upper shoulder of the shell " in Melampus bidentatus, but not in M. coffeus.

They also say that the former is more common in salt marshes whereas the latter is "found mostly among Mangrove roots and branches".


Best wishes,

Susan J. Hewitt