CLASSIFICATION OF HIRUDINARIA GRANULOSA​

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 :- Hirudinaria

SPECIES :- granulosa

GEOGRAPHICAL DISTRIBUTION

  • It has cosmopolitan distribution and specially found in India and Myanmar.

HABIT AND HABITAT

  • Hirudinaria is found in fresh water ponds, lakes and swamps. It is a blood sucking or sanguivorous ectoparasite feeding and sucking the blood of frog, fishes and men.

HIRUDINARIA GRANULOSA​

GENERAL CHARACTERSTICS OF HIRUDINARIA GRANULOSA​

  • Commonly called as Indian cattle leech.
  • Body is soft, vermiform, elongated dorsoventrally flattened, measuring 30 to 35 cm in length.
  • Skin is kept moist and slimy due to abundant mucus secretion.
  • Anterior and posterior suckers are well developed.
  • Dorsal surface is olive green, ventral surface orange-yellow or red. Both surfaces have black stripes.
  • Body is divided into cephalic, preclitellar, clitellar, middle, caudal and posterior sucker regions with 33 segments. Each segment is superficially divided into 5 annuli.
  • Anterior sucker is oval and contains ventral tri-radiate mouth. It is formed by the fusion of prostomium and few anterior segments. The posterior sucker is highly muscular and acts as powerful locomotory and adhesive organ.
  • Eyes 5 pairs dorsally. Segmental receptor organs are 4 pairs (dorsal) and 3 pairs (ventral). Anus is on 26th segment, nephridiopores on 6 to 22 segments ventrally, male-genital pore on mid-ventral, inter-segmental groove of 2nd and 3rd annuli of 10th segment and female-genital pore on 11th segment.
  • Hermaphroditic. Genital organs are like Hirudo. Reproduction sexual. Development takes place on cocoons.
HIRUDINARIA GRANULOSA​

SPECIAL FEATURES

  • Cattles are often submerged in tanks and lakes. Several leeches attach to their body for blood sucking. It is said that a fully fed leech can live several months without blood-feed.

IDENTIFICATION

  • The leech contains 33 segments and all above features, hence it is Hirudinaria granulosa.

HIRUDINARIA GRANULOSA​
HIRUDINARIA GRANULOSA​
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