SACCOGLOSSUS

CLASSIFICATION OF SACCOGLOSSUS

PHYLUM :-  HEMICHORDATA ( Marine, enterocoelous coelomate. Notochord confined to head region).

CLASS :- ENTEROPNEUSTA  ( Several gill-slits, intestine straight, solitary).

FAMILY :- HARRIMANIIDAE

Genus : Saccoglossus (Acorn worm).

GEOGRAPHICAL DISTRIBUTION

  • It is found in New Zealand, Australia, Indopacific and Atlantic coasts and North America.

HABIT AND HABITAT

  • It is marine, burrowing and tubicolous animal. These burrow in sand flats near low tide, line, living in semipermanent tunnels lined with mucous secretions. The mouth, which apparently cannot be closed, lies ventrally between the proboscis and collar. As the worm burrows much of the sand is swallowed.

SACCOGLOSSUS DIAGRAM HEMICHORDATA

GENERAL CHARACTERSTICS OF SACCOGLOSSUS

  • It is vermiform hemichordate.
  • Body regionated into proboscis (prosoma) collar (mesosoma) and trunk (metasoma). 
  • Proboscis is exceptionally longer than any other enteropneust.
  • Collar slightly overhangs the beginning of trunk, covering three of four gill-slits. 
  • Trunk is differentiated into three regions. In the anterior part numerous pairs of gill-slits open externally near the middorsal line. Middle part has gonads which are grey in female and yellow in male. Posterior region has only posterior part of intestine and tapers gradually to anus. 
  • Hepatic sacculations and genital ridges. So well developed in Balanoglossus, are absent. 
  • Synapticulae are absent in pharynx and such tongue bars hang freely in gill-slits. 
  • Its affinities etc., are similar to those of Balanoglossus.
SACCOGLOSSUS HEMICHORDATA

IDENTIFICATION

  • It has long proboscis and all above features, hence it is Saccoglossus.
SACCOGLOSSUS DIAGRAM HEMICHORDATA
SACCOGLOSSUS DIAGRAM HEMICHORDATA

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

This Post Has One Comment

Leave a Reply