Hey everyone! I need serious help! Do you know what a scaphpoda is? (science geniuses- this one is for you!) thank you so much!
2007-02-26 05:36:30 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Earth Sciences & Geology
Scaphoda (not scaphpoda):
All scaphoda species, a mere 200 or so, are marine inhabitants that live partially buried in sand or gravel all their lives. The tusk or tooth shells, as they are more commonly known, have the simplest shell structure and anatomy of all the molluscs. They show very little variation in structure except that the members of the Dentalium resemble elephant tusks, while those of the Cadulus class look like swollen cucumbers open at each end.
The number and shape of the longitudinal ribs along with the coloration and curious slots appearing along the edge of the smaller posterior end of their shell all help to distinguish the various species of tusk shells.
They are relatively inactive creatures with a low metabolic rate and a very simple anatomy. Scaphopods generally burrow in the sand at depths ranging from 18(6 meters) to 600 feet (200 meters), however, a few do inhabit shallower waters and some have even been found in the oceans' deepest trenches.
2007-02-26 05:42:59 · answer #1 · answered by brooks b 4 · 0⤊ 0⤋
SCAPHOPODA, the third of the five classes into which the Phylum Mollusca is divided.' The Scaphopoda are marine Molluscs with the body, especially the foot, adapted to a burrowing life in sand. The structure is bilaterally symmetrical, the body and shell elongated along the antero-posterior axis and nearly cylindrical. The right and left margins of the mantle are united ventrally, leaving an anterior and posterior aperture to the mantle cavity. The shell has therefore the form of a tube open at both ends. The head is somewhat rudimentary and without eyes, but bears two dorsal appendages produced into numerous long filaments. Buccal mass and radular apparatus are present, but ctenidia are entirely wanting. The foot is cylindrical. At first supposed to be tubicolous Annelids, Dentalium and its allies were afterwards placed among the Gastropoda, to which recent authorities consider them to be closely related.
2007-02-26 13:44:43 · answer #2 · answered by mueller_lm 3 · 1⤊ 0⤋
Did you mean scaphopoda? They are molluscs. They would look like tusks sticking out of the gravel or sand in water.
2007-02-26 13:45:07 · answer #3 · answered by Kathy G 2 · 1⤊ 0⤋
I believe those are mollusks.
2007-02-28 18:25:32 · answer #4 · answered by peskylisa 5 · 0⤊ 1⤋