CLASSIFICATION OF SYLLIS
PHYLUM :- ANNELIDA (Metamerically segmented, coelomate and laterally symmetrical. )
CLASS :- POLYCHAETA (Many setae, clitellum absent. )
ORDER :- ERRANTIA (Free-swimming or burrowing, pharynx protrusible, provided with jaws and teeth. )
GENUS :- Syllis
GEOGRAPHICAL DISTRIBUTION
It is common in U.S.A., Woods Hole regions, Long Island Sound to Bay of Fundy.
HABIT AND HABITAT
Syllis is marine polycheate, known for its transverse fission and abundant in clear, shallow water among hydroids, mussels, tunicates and also in mud, sand and on shells.
GENERAL CHARACTERSTICS OF SYLLIS
- Animal measures approximately 30 cm in length and divisible into head and body segments.
- Anterior end constitutes head which is fonned by prostomium and peristomium.
- Prostomium contains 2 pairs of prostomial eyes, 3 pairs of prostomial tentacles and 2 grooved and jointed palps.
- Each parapodium consists of a long jointed notopodiaI cirrus and a well developed neuropodium with nonnal setae and cirrus. The notopodium is absent.
- Pharynx contains a conical jaw connected to poison gland by its duct.
- During breeding season, body is distinguished into anterior asexual (atoke) and posterior sexual (epitoke) regions.
- In Syllis hyalina, the epitoke region separates and regenerates independent head (either male or female).
- In S. ramosa lateral buds are fonned giving rise to much branched colony.
- Some of the lateral branches develop gonads and heads and later separate to become independent sexual adults.
SPECIAL FEATURES
Syllis shows extensive asexual reproduction by transverse fission.
IDENTIFICATION
the animal contains branched body segments and all above characters, hence it is Syllis.
OUR POSTS
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
HEDGEHOG (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 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 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 ? 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 : PHOCASEAL : 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 : 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 LARVACYCLOSTOMATA 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 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 BONESSKULL 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
Pingback: PHYLUM ANNELIDA | FAUNAFONDNESS | 2021