CLASSIFICATION OF NEPHELES (ERPOBDELLA)​

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

CLASS :- CLITELLATA (having a clitellum – the ‘collar’ that forms a reproductive cocoon during part of their life cycles)

SUB-CLASS :- HIRUDINEA (Annelids with fixed segments, without parapodia and with anterior and posterior
suckers.)

ORDER :- ARCHYNCHOBDELLIDA OR GNATHOBDELLIDA (Proboscis non-protrusible; jaws present.)

FAMILY :- HIRUDINIDAE 

GENUS :- Nepheles

GEOGRAPHICAL DISTRIBUTION

  • It has cosmopolitan distribution.

HABIT AND HABITAT

  • Nepheles is found in ponds and streams, under stones and water plants. It is predaceous form with indiscriminating appetites, feeding upon insect larvae, planarians, snails and crustaceans.

NEPHELES (ERPOBDELLA)​

GENERAL CHARACTERSTICS OF NEPHELES (ERPOBDELLA)​

  • Body is elongated, cylindrical and whitish in colour with distinct posterior sucker. The margins of the body are smooth. 
  • Each body segment has 5 annuli or rings. The annuli and true segments are not easily demarcated and consist of 19 segments. 
  • Head is not prominent but can be recognized by having 2 pairs of eyes. 
  • Setae, parapodia and jaws are absent. 
  • Genital pores are separated by 203 rings.
  • Development takes place in cocoons.
NEPHELES (ERPOBDELLA)​

IDENTIFICATION

  • The animal contains 10 segments and all above features, hence it is Nepheles.

NEPHELES (ERPOBDELLA)​
NEPHELES (ERPOBDELLA)​
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