Table 2. Lateral Extent and Abundance of Fauna in the Study Area 



Fauna 



Areal 



Relative 



Major Associated 





Distribution 



Abundance 



Sediment Type 



Pelecypods 









Aequepecten sp. 



Widespread 



Common 



A,C 



Anadara notabilis (Roding) 



Widespread 



Common 



C 



Anadara transversa (Say) 



Widespread 



Common 



C,H 



Anamella eardia cuneimeris 



Restricted 



Very Rare 



E 



Anomalocardia cuneimeris (Conrad) 



Restricted 



Very Rare 



A 



Anomia simplex (Orbigny) 



Common 



Rare 



A 



Chione cancellata (Linne) 



Widespread 



Common 



A,C,E 



Chione grus (Homes) 



Common 



Rare 



A,C 



Chione intapurpurea (Conrad) 



Common 



Rare 



A 



Corbula dietziana (C.B. Adams) 



Restricted 



Very Rare 



A 



Crassinella lunulata (Conrad) 



Restricted 



Very Rare 



A 



Divaricella quadrisulcata (Orbigny) 



Restricted 



Rare 



C 



Donax variabilis (Say) 



Restricted 



Abundant 



C,A 



Glycymeris undata (Linne) 



Common 



Rare 



A 



Laevicardium laevigatum (Linne) 



Restricted 



Very Rare 



A 



Mactra fragilis (GmeUn) 



Restricted 



Very Rare 



A 



Mercenaria campechiensis (Gmelin) 



Restricted 



Common 



E 



Mulinia lateralis (Say) 



Ubiquitous 



Common 



A,C 



Ostrea sp. 



Restricted 



Rare 



C 



Tellina sp. 



Restricted 



Very Rare 



A 



Venericardia perplana (Conrad) 



Restricted 



Very Rare 



A 



Gastropods 









Crepidula fornicata (Linne) 



Widespread 



Common 



A,C 



olivella sp. 



Restricted 



Very Rare 



C 



other gastropod fragments 



Restricted 



Rare 



A,C,E 



Other Fauna 









barnacles 



Widespread 



Common 



A,C 



benthonic foraminifers 



Common 



Common 



A,C,H,E 



Bryozoa lunulutiform 



Common 



Rare 



A,C 



echinoid spines and plates 



Common 



Rare 



A 



Ostracods 



Common 



Rare 



A,C,H,E 



32 



