Department of Zoology at ANDC/Zoology Museum/Permanent slides/Mollusca

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{|cellpadding="5" cellspacing="6" style="width:100%;background:#FFFFFF; border-style:solid; border-width:3px; border-color:#0066FF;" Date & Time : 28, August 2024      
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= T.S. of Gill of Unio  =


 * Composition : composed of two laminae, one inner other outer.


 * Lamina : made of two lamellae,outer and inner, united at aterior,ventral and posterior edges but free dorsally.


 * Inter-Lamellar junctions- form series of ventral compartments,also have afferent and efferent branchial vessels.


 * Lamellae : composed of filamnts connected by inter filamentar junctions.


 * Ostia : present between gill filaments.

= Glochidium larva  =


 * found in development of Bivalvia.


 * Size : minute larva,measuring 0.1 to 0.4mm.


 * Division : comprises head and mantle.


 * Shell : comprises two triangular valves,united dorsally and free ventrally, ventral end of each valve is produced intoo curved hook bearing spines.


 * Mantle : small,have sensory organs(brush like).


 * Adductor muscle : well developed,extending between valves of base.


 * It leads a parasitic life on a fish before metamorphosis into adult.