LUIDIA (SEVEN ARMED STARFISH)

CLASSIFICATION OF LUIDIA

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 :- ASTEROIDEA (Central disc and arms fused.)

ORDER :-PAXILLOSIDA (adults lack an anus and have no suckers on their tube feet.)

FAMILY :-  LUIDIIDAE

GENUS :- Luidia (The seven armed starfish)

GEOGRAPHICAL DISTRIBUTION

  • It is found in Atlantic; Pacific coast from Alaska to Mexico; Florida; West Indies and West coast of Africa.

HABIT AND HABITAT

  • Luidia is a tropical and sub-tropical asteroid echinoderm commonly present below low-water mark to 190 fathoms

LUIDIA (SEVEN ARM STARFISH)

GENERAL CHARACTERSTICS OF LUIDIA​

  • Commonly called as star-fish.
  • Animal consists of a comparatively small, central disc and 5 to 11 elongated, flexible and cylindrical arms.
  • Body differentiated into oral and aboral surfaces. 
  • Arms are bordered with spiny fringe. 
  • Oral surface contains a central mouth with communicates with ambulacral grooves in each arm. 
  • Marginal plates on margin.
  • Infra-marginal plate is separated from the ambulacral plate by a small intermediate plate. 
  • Aboral surface is made up of several small rectangular ossic1es. This surface is marked by coloured patches.
  • Pedicellariae are generally found.
  • The gills are branched.
  • Anus and intestinal caeca are absent.
LUIDIA (SEVEN ARM STARFISH)

SPECIAL FEATURES

  • Luidia have seven arms.
  • A polynoid polychete (Achloe astericola) is found as commensal in the ambulacral groove of Luidia.

IDENTIFICATION

  • The animal contains comparatively short central disc, long flexible arms and all above features hence it is Luidia.

LUIDIA (SEVEN ARM STARFISH)
LUIDIA (SEVEN ARM STARFISH)
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