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Scientific Name: Laganum decagonale ( de Blainville, 1827) author name
English Name: Sand dollars, Sea biscuits, Cake urchins
Local/Bangla Name: Not Known
Classification:
Kingdom: Animalia
Phylum: Echinodarmata
Class: Echinoidea
Order: Echinolampadacea
Family: Laganidae
Description:
The central apical system is slightly elevated. The well-developed petals form a petaloid region, which comprises approximately 41% of the sand dollar’s length. Madreporic pores are situated within a sinuous groove. The mouth is on the ventral side and positioned in the center, with straight and uncomplicated food grooves. Oral furrows are clear up to half the radius of the test. The anus and periproct are located on the oral side, within the posterior interambulacrum, near the posterior margin. There are five genital pores.
Habitat & Distribution in Bangladesh:
Bay of Bengal, Bangladesh
Environment:
Marine
Main References:

KABIR SMH, AHMED M, AHMED ATA, RAHMAN AKA, AHMED ZU, BEGUM ZNT, HASSAN MA, KHONDKER M (EDS.) 2009. Encyclopedia of flora and fauna of Bangladesh, Vol. 16. Annelida Echainodermata Acanthocephala and Minor Phyla.. Asiatic Society of Bangladesh, Dhaka. 232 pp.

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