OPHIOTHRIX

CLASSIFICATION OF OPHIOTHRIX

KINGDOM :- ANIMALIA (Multicellular eukaryotic organisms)

PHYLUM :- ECHINODERMATA (Coelomate, pentaradiate and spiny skinned animals with vascular system.)

SUB-PHYLUM :- ELEUTHEROZOA (Non-pedicellate and free-living.)

CLASS :- OPHIUROIDEA (Central disc and arms distinct.)

ORDER :- OPHIURIDA (Arms bent only to lateral sides.)

FAMILY :- AMPHIURIDAE (Their jaws are always with two apical papillae at the tip, and one or more papillae on each side)

GENUS :- Ophiothrix

GEOGRAPHICAL DISTRIBUTION

  • Cosmopolitan.

HABIT AND HABITAT

  • Ophiothrix is found in sea shore and in shallow warers. It is microphagus feeding on microbes.

OPHIOTHRIX

GENERAL CHARACTERSTICS OF OPHIOTHRIX

  • Commonly called as Brittle star. 
  • Ophiothrix reveals considerable variation in spine armature and colour pattern. No two individuals are alike. 
  • Body divisible into oral and aboral surfaces. Central disc and arms quite distinct. 
  • Spines on the disc continue round its sites, lateral spines are larger in size. Interradially and on edges of oral surfaces.
  • Aboral surface has radial shields in central disc. 
  • Mouth in oral surface has complicated system of plates, spines and tube feet. Inter-radially buccal shields are present and beneath on lateral position are lateral buccal shield. Around mouth are jaw. 
  • At the base of each arm are slit like Bursal slit. 
  • Oral surface reveals each arm is made up of vertebral consisting of lateral plates and ventral plate. Lateral spines, tube foot, jaw and tentacle scale are seen.
  • Aboral surface contains dorsal plates.
OPHIOTHRIX

IDENTIFICATION

  • The animal contains radial shields in aboral surface and all above features hence it is Ophiothrix.

OPHIOTHRIX
OPHIOTHRIX
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

Leave a Reply