Phyllum Mollusca and Minor Phyla
Animal Diversity: Non Chordata Zoology Code : CCOCWZOO2

View Syllabus Enquiry
Course Name Phyllum Mollusca and Minor Phyla
Course Subject Animal Diversity: Non Chordata
Course Code CCOCWZOO2
Course Coordinator Dr BIJOY C
Course Category Zoology

About Course

The course deals with the introduction to the Phylum Mollusca. These are organisms commonly known as shell-fishes which in most cases seems protected inside calcareous shells. The group includes clams, mussels, chitons, oysters, squids, snails, slugs etc. They stand second to Phylum Arthropoda in terms of diversity with almost one lakh living species. In this short course, the salient features of the group, detailed anatomy and physiology of the type Pila globosa and its different body systems are detailed. This course also deals with the classification of Mollusca to its classes with examples.


The elementary idea about the classification of the living world and the basic biological terminology.  


Describe the characteristic features of phylum Mollusca, illustrate its classification down to classes and explain the structural organization of Pila globosa

Course Syllabus

Lecture Notes

Detailed classification of Mollusca by Brusca and Brusca (2003) who divided the phylum into 7 classes. Examples of each class were included and additional notes of Nautilus and Nudibranchs were also given.

Lecture Videos

Classification of Phylum Mollusca

This is an educational video lesson contains details about various classes of Phylum Mollusca. Class Aplacophora: 00:54 Class Monoplacophora: 07:35 Class Polyplacophora: 14:55 Class Gastropoda: 20:00 Class Pelecypoda: 27:53 Class Scaphopoda: 34:57 Class Cephalopoda: 40:15 All the images and graphics used for preparing this Powerpoint are under Copyright of respective authors.

Respiratory System in Pila globosa

Dual mode of respiration Aquatic respiration with help of ctenidium (Gill) Aerial respiration with help of Pulmonary sac (lung)

Excretory System in Pila globosa

Excretory system in Pila globosa includes renal organ or kidney (Organ of Bojanus). Bilocular with the anterior renal chamber and posterior renal chamber. Renal lamellae in the anterior renal chamber. Ammonotelic excretion in water and Uricotelic excretion in the land. Water conservative mechanism.

Blood Vascular System in Pila globosa

This video lesson covers blood, the structure of heart, arterial system, venous system and the course of circulation. Watching this video until completion is recommended to get the concept clear.

Nervous system in Pila globosa

The nervous system of Pila globosa which includes ganglia, connectives and commissures.

Sense Organs in Pila globosa

Sense organs like tentacles, eyes, osphradium and statocysts are explained with its function.

Reproductive system in Pila globosa

Male and female genital system of Pila globosa Males have a prominent hypobranchial gland and a functional penis with a penile sheath. Females with rudimentary penis and poorly developed hypobranchial gland.

Minor Phyla: Lophophorites

The video details about Lophophorates- two phyla with a special oral organ called Lophophore. Ectoprocta and Phoronida Clade Lophophorata: 01:15 Phylum Phoronida: 03:16 Phylum Bryozoa (Ectoprocta): 12:32 Questions to be answered What are Lophophores? Which all phyla possess this unique character? Saliant features of Phylum Phoronida. Comment on the morphology of Phoronis. Saliant features of Phylum Bryozoa. Comment on the polymorphism of Bugula. All the images and graphics used for preparing this Powerpoint are under Copyright of respective authors.

Practice Quiz

a) Neopilina

b) Neomenia

c) Chiton

d) Chaetoderma

a) Monoplacophora

b) Polyplacophora

c) Scaphopoda

d) Aplacophora

a) Chiton

b) Neomenia

c) Dentalium

d) Perna

a) Byssus threads

b) Hatchet foot

c) Captacula

d) Sensory tentacle

a) Class gasropoda

b) Class Pelecypoda

c) Class polyplacophora

d) Class Scaphopoda

a) Nautilus

b) Octopus

c) Mytillus

d) Nudibrachs

a) Vibricula

b) Kenozooid

c) Avicularia

d) All of the above

a) Visceral ganglia

b) sub intestinal ganglia

c) Cerebral ganglia

d) all the above

a) Eupyrene sperm

b) Oligopyrene sperm

c) All the above

d) None of the above

a) Octopus

b) Sepia

c) Loligo

d) All the above