CLASSIFICATION OF SERPULA

PHYLUM :- ANNELIDA (Metamerically segmented, coelomate and laterally symmetrical. )

CLASS :- POLYCHAETA (Many setae, clitellum absent. )

ORDER :- SEDENTARIA  (Tubicolous, sedentary and proboscis not-protrusible, without jaws or teeth.)

GENUS :- Serpula

GEOGRAPHICAL DISTRIBUTION

  • It is found in Europe and U.S.A.

HABIT AND HABITAT

  • Serpula lives in a hard, shelly, calcareous and twisted tube, attached to shells and other marine objects. Several animals live together.

SERPULA

GENERAL CHARACTERSTICS OF SERPULA​

  • Body is elongated and cylindrical but contractile. 
  • Anterior end forms head consisting of prostomium and peristomium.
  • Posterior end remains attached with mass of calcareous tubes. 
  • Prostomium contains a pair of incomplete circlets of feathered gills or branchian which are elongated and pinnately branched. 
  • Gills are modified palps, sometimes supported by cartilaginous skeleton and are richly supplied with blood and besides respiration serve to collect microscopic food particles.
  • Each gill consists of an elongated branch, having two rows of short filaments. 
  • Tip of one of the dorsal filaments enlarges to form stopper or operculum, often armed with plates and spines for the closure of the tube in which the annelid lives. 
  • Peristome is extended forward as paired membrane to form a collar which is employed in smoothing the inside of the shell. operculum 
  • Nephridia of posterior segments act as genital ducts.
SERPULA

IDENTIFICATION

  • The animal contains a pair of feathered gill and all above characters, hence it is Serpula.

SERPULA
SERPULA
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