Blog

GRANTIA

GRANTIA

Contents hide
1) GRANTIA
1.1) CLASSIFICATION OF GRANTIA
1.2) GEOGRAPHICAL DISTRIBUTION
1.3) HABIT AND HABITAT
1.4) GENERAL CHARACTERSTICS OF GRANTIA
1.5) IDENTIFICATION

CLASSIFICATION OF GRANTIA

PHYLUM :- PORIFERA (Pore bearing, cellular grade, asymmetrical or radially symmetrical.)

CLASS :- CALCAREA (Calcareous spicules present.)

ORDER :- HETEROCOE (Syconoid sponges with internal folds. )

FAMILY :-  SYCETTIDAE 

GENUS :-  Grantia

GEOGRAPHICAL DISTRIBUTION

Found in Gulf of St. Lawrence. Common in Europe. Distributed from Rhode Island to Greenland.

HABIT AND HABITAT

Grantia is a small, solitary or colonial marine sponge found in shallow to approximately 60 fathoms deep in well oxygenated water.

GRANTIA

GENERAL CHARACTERSTICS OF GRANTIA

  • Complex vase-shaped body, measuring 20 to 25 mm in length and 5 to 6 mm in diameter. 
  • Each cylinder bulges in the middle and opens to the exterior by osculum. Body surface is covered by a ostia bearing membrane. 
  • At the distal free end there is a large osculum, encircled by a fringe of large giant monaxon spicules forming funnel-shaped collar or oscular fringe.
  • Proximal and or base attached to substratum .
  • Body wall is thick through which monaxon, triaxon and tetraxon spicules project.
  • Body wall is composed of outer dermal epithelium, middle mesenchyma and inner flattened epithelium lining spongocoel which opens through the osculum.
  • Canal system is syconoid. Choanocytes are restricted to radial canals. Course of water current is ostia -> prosopyles -> radial -> canals -> apopyles -> spongocoel -> osculum -> exterior. Nutrition, respiration and excretion by canal system. 
  • Hermaphroditic. 
  • Reproduction by sexual or asexual methods. Asexual reproduction by budding and regeneration, while sexual by ova and sperms. Larva is amphiblastula.
GRANTIA

IDENTIFICATION

The classification and other general characters are similar to Sycon, But Grantia differs from Sycon so that the dermal membrane spreads over the entire surface of the sponge, forming a” cortex of varying thickness having special cortical spicules.

GRANTIA, PORIFERA, PHYLUM PORIFERA
GRANTIA
back to categories

References

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
Tags: ,

This Post Has One Comment

Leave a Reply