ARENICOLA

CLASSIFICATION OF ARENICOLA

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 :- Arenicola (The Lug worm)

GEOGRAPHICAL DISTRIBUTION

  • It is distributed in Europe and U.S.A. (Florida to Cape Cod)

HABIT AND HABITAT

  • Arenicola is also tubiculous and burrowing polychaete, occurring just below the tide line in sea, where the water is less saline. Animals lives in a J-shaped burrow made of sand and mucus.

ARENICOLA

GENERAL CHARACTERSTICS OF ARENICOLA​

  • Body is stout, elongated, cylindrical and approximately 15 cm long, brownish or greenish in colour and divided into metameres.
  • Head without appendages and with an unarmed proboscis. 
  • Animal is differentiated into an anterior pre-branchial, a middle branchial and a posterior post-branchial region. 
  • Anterior region consists of a small trilobed prostomium with no eyes or tentacles, an achaetus peristomium and 6 segments bearing rudimentary parapodia. 
  • Parapodia contains reduced notopodium and neuropodium.
  • Mouth lies ventral to the prostomium. The buccal region and pharynx protrude as proboscis which is covered by chitinized buccal papillae. 
  • Middle region has 13 segments, each bearing in addition to neuropodia, a pair of extensively branched gills. Nephridia six pairs. 
  • Posterior region has variable number of segments and devoid of parapodia or gills. Anus opens through last segment. 
  • Arenicola is generally used as bait for fishing.
ARENICOLA

IDENTIFICATION

  • The animal pre-branchial, branchial and post-branchial regions and all above features, hence it is Arenicola.

ARENICOLA
ARENICOLA
OUR POSTS
  • WHALE (BALAENOPTERA)​WHALE (BALAENOPTERA)​
    WHALE (BALAENOPTERA)​ CLASSIFICATION OF WHALE (BALAENOPTERA)​ PHYLUM :- CHORDATA (Notochord, dorsal tubular nerve cord present and gill slits present) Group :- CRANIATA (Definite head. Cranium with ...READ MORE
  • ERINACEUS : HEDGEHOGHEDGEHOG (ERINACEUS)
    HEDGEHOG (ERINACEUS) CLASSIFICATION OF ERINACEUS : HEDGEHOG PHYLUM :- CHORDATA (Notochord, dorsal tubular nerve cord present and gill slits present) Group :- CRANIATA (Definite head. Cranium with ...READ MORE
  • ZEBRAZEBRA
    ZEBRA CLASSIFICATION OF ZEBRA PHYLUM :- CHORDATA (Notochord, dorsal tubular nerve cord present and gill slits present ) Group :- CRANIATA ( Definite head. Cranium with brain present ) ...READ MORE
  • MANGOOSE : HERPESTESMANGOOSE : HERPESTES
    MANGOOSE : HERPESTES CLASSIFICATION OF MANGOOSE : HERPESTES PHYLUM :-  CHORDATA (Notochord, dorsal tubular nerve cord present and gill slits present) Group :- CRANIATA (Definite head. Cranium with ...READ MORE
  • WHY ELEPHANTS NEVER FORGETS ?WHY ELEPHANTS NEVER FORGETS ?
    WHY ELEPHANTS NEVER FORGETS ? It’s a not unexpected saying that elephants always remember, and that is why these great creatures are more than just monster strolling on our planet earth. The ...READ MORE
  • SEAL DIAGRAM : PHOCASEAL : PHOCA
    SEAL : PHOCA CLASSIFICATION OF SEAL (PHOCA) PHYLUM :- CHORDATA (Notochord, dorsal tubular nerve cord present and gill slits present) Group :- CRANIATA (Definite head. Cranium with brain present) ...READ MORE
  • HERDMANIA SLIDESHERDMANIA SLIDES
    HERDMANIA SLIDES Herdmania : Metamorphosis : Tadpole Larva Larva of Herdmania is called as tadpole larva. After hatching it leads a free-swimming life for 90-180 seconds and then undergoes ...READ MORE
  • AMMOCOETE LARVA
    CYCLOSTOMATA SLIDES Lamprey : Ammocoete : Larva Whole Mount COMMENTS :- It is one of the stages in the development of lamprey. Egg develops into ammocoete larva, which is a tiny transparent creature ...READ MORE
  • VERTEBRAL COLUMNVERTEBRAL COLUMN
    Vertebral Column Notochord In all chordate embryos, the first axial endoskeleton to appear is a slender, stiff, unsegmented, gelatinous rod, the notochord. It is present below the nerve cord and ...READ MORE
  • SKULL BONESKULL BONES
    SKULL BONES SCOLIODON : SKULL BONES Skull consists of :- (A) Cranium and sense capsules,  (B) Visceral skeleton. 1. Cranium and sense capsules Made up of a single piece of cartilage and divisible ...READ MORE

This Post Has One Comment

Leave a Reply