CLASS SCAPHOPODA (skaphe boat + podus, foot)

CLASS SCAPHOPODA (skaphe boat + podus, foot)

1. Habitat: Members of the class Scaphopoda are called tooth shells or tusk shells. This class has over three hundred species. All are burrowing marine animals living in moderate depths.

2. Shell and body parts: A conical shell is their most distinctive characteristic. This shell is open at both ends. Head and tbot project from the wider end of the shell. The rest of the body and mantle is greatly elongate. It extends the length of the shell.

3. Respiration and nutrition: Scaphopods mostly buried in the substrate. Their head and foot oriented down. The apex of the shell projects into the water. There are openings at the apex of the shell. Incurrent and excurrent water enters and leaves the mantle through these openings. Functional gills are absent. Gas exchange occurs across mantle folds. Scaphopods have a radula and tentacles. These are used for feeding on foraminiferans.


----------------------------


----------------------------

4. Reproduction: Sexes are separate. Trochophore and veliger larvae are produced.

Similar Articles:

Leave a Reply

Your email address will not be published. Required fields are marked *