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Prostomium vs Peristome - What's the difference?

prostomium | peristome |

In zoology terms the difference between prostomium and peristome

is that prostomium is that portion of the head of an annelid situated in front of the mouth while peristome is the parts of or surrounding the mouths of numerous invertebrates.

prostomium

English

Noun

(prostomia)
  • (zoology) That portion of the head of an annelid situated in front of the mouth.

    • Related terms

    * prostomial (Webster 1913)

    peristome

    English

    (wikipedia peristome)

    Noun

    (en noun)
  • (botany) One or two rings of tooth-like appendages surrounding the opening of the capsule of many mosses.
  • * 1911 , ,
    • Its removal does not, however, leave the mouth of the capsule wide open, for around the margin are two circles of pointed teeth forming the peristome .
  • (zoology) The parts of or surrounding the mouths of numerous invertebrates.
  • * 1911 , ,
    • We can distinguish therefore in the body of a polyp the column, circular or oval in section, forming the trunk, resting on a base or foot and surmounted by the crown of tentacles, which enclose an area termed the peristome', in the centre of which again is the mouth. The mouth may be level with the surface of the ' peristome , or may be projecting and trumpet-shaped.
  • The lip, or edge of the aperture, of a spiral shell.

    • Anagrams

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