Question

Ascanoid canal system occurs in

• A. Grantia
• B. Scypha
• C. Leucosolenia
• D. Spongilla

Answer 1

The correct option is C Leucosolenia

Asconoid canal system is the simplest type of canal system found in asconoid sponges like Leucosolenia. It is the only canal system in which spongocoel is lined by choanocytes. The ostia are represented by cells called porocytes. These cells have intracellular canal inside them. The cells extend radially into the mesenchyme and open directly into the spongocoel.

Grantia and Scypha have syconoid canal system and Spongilla has leuconoid canal system.

So, the correct answer is 'Leucosolenia'.