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The AAPG/Datapages Combined Publications Database

GCAGS Transactions


Gulf Coast Association of Geological Societies Transactions
Vol. 19 (1969), Pages 353-367

Use of Normal Pores in Taxonomy of Ostracoda

Harbans S. Puri, Bruce E. Dickau


On the lateral surface of the carapace ostracodes have radial pores of two types: "simple" and sieve. The functions of these two pore types are not fully known. Studies of the carapace with a scanning electron microscope reveals differences between the pores of Myodocopa, Platycopina, Cladocopa, and Podocopina. Sieve pores demonstrate the greatest dimorphism and are confined to the superfamily Cytheracea. A basic pattern of pores was formulated:

Type A. Single pore with a sensory hair.
A^prime Normal pore without a lip.
A^Prime Normal pore with a lip.
Type B. A sieve plate without a well-defined central or subcentral pore with a sensory hair.
Type C. Type A superimposed on Type B.
A sieve plate with a pore and sensory hair emerging from its center.
Type D. Combination of Type A and Type B.
A sieve plate, and a separate single pore with a sensory hair.

These types can be utilized in future systematic studies of Ostracoda.

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