Did you know that there were two different DOSINIA shells that wash up from the Gulf Of Mexico on to the shores of Sanibel, Captiva and Southwest Florida? In my last post, I showed you so much BEACH BLING that washed up after high west winds and teased you with two DOSINIAS as well. It’s pretty common to see DISK DOSINIA (Dosinia discus) seashells on our beaches but it’s very difficult to tell them apart from their sister and more elusive shell… the ELEGANT DOSINIA (Dosinia elegant).
To identify most bivalve shells, it’s easier to look at their interior since the biggest differences show on the inside around the hinges and also where the MOLLUSK itself connected to the shell. But… just like the outside shape, color and thickness- the interior is so similar too on these shells that it’s still so hard to tell them apart.
The easiest way for me to distinguish the differences of the DISK DOSINIA from the ELEGANT DOSINIA is by looking closely at the outside grooves on the shell. The DISK is on the left and the ELEGANT is on the right of all of my photos. Now it’s a little easier to see a difference, right?
Notice how fine the grooves are on the left shell (DISK) compared to the coarse grooves of the shell on the right (ELEGANT). If you rub your thumb nail along the out side of each shell you can definitely tell the difference .
I know you can’t run your thumb over these shells I showed you in the photos but I hope I showed you enough detail so that you could identify each one in person. But let’s just see if you can still spot the differences in CYBERSHELLING! YAY! Okay, here goes…. How many ELEGANT DOSINIAS can you find in this next photo?
Hopefully, now you will be able to pick up a DOSINIA and impress your friends and family by telling them which type of DOSINIA you just found. (heehee)