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Wednesday, January 22, 2025

classification of invertebrates on basis of major and minor phyla

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These phylum were later classified as Major and Minor Phyla on the basis of their number of species a...
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Monday, January 20, 2025

Brief of Mollusca’s class-GASTROPODA

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               The word Gastropoda is derived from two Greek words gaster=belly and podos=foot. It has three subclass namely Prosobranchi...
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Friday, December 2, 2011

characteristics of Class -PELECYPODA of MOLLUSCA

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T he word PELECYPODA  is derived from two Greek words pelekys=hatchet and podos.The characteristics   can be listed below.  1. They ar...
Friday, November 25, 2011

characteristics of class -SCAPHOPODA of Mollusca

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The word Scaphopoda is derived from two Greek words.They are scapha=boat and podos=foot. So it includes molluscas having boat shaped body. H...
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Tuesday, November 22, 2011

Orders of subclass3-PULMONATA

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The subclass 3-Pulmonata has only two orders namely as follows. Order 1:-BASOMMATOPHORA   Order 2:-STYLOMMATOPHORA Order 1:-B...

characteristics of subclass 3-PULMONATA

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1) They are mostly fresh water or terrestrial and few marine . 2) They have typical spiral shell or reduced or absent.If present      part...
Saturday, October 8, 2011

Characteristics of orders-9-NUDIBRANCHIA,10-RHODOPACEA,11-PYRAMIDELLACEA ,12-PARASITA of subclass OPISTHOBRANCHIA

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Order 9:-NUDIBRANCHI   1)They do not have or are naked  2) They do not have internal gill or ctenidium an     osphradium  3) Ma...

Characteristics of orders-6-PHILILNOGLOSSACEA,7-SACCOGLOSSA,8-NOTASPIDEA of subclass OPISTHOBRANCHIA

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Order6:- PHILILNOGLOSSACEA               1) They are minute naked snail.          2) They do not ha...
Friday, October 7, 2011

Characteristics of orders-3-ANASPIDEA,4-PTEROPODA,5-ACOCHILIDIACEA of subclass OPISTHOBRANCHIA

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Order3:- ANASPIDEA 1) They are mostly found in tropica; and subtropical       waters. 2) They have...

Characteristics of order1-ONCHIDIACEA and order2-CEPHALASPIDEA of subclass-OPISTHOBRANCHIA

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Order1-ONCHIDIACEA 1) They are slug-like, naked or without shell. 2) They have mantle which is proj...