190 



REAKA AND MANNING 



stomatopods was low compared to that in other crusta- 

 ceans and gastropods (Reaka and Manning, 1987b). 



Our field studies show that considerable microhabitat 

 overlap, particularly for individuals of similar body sizes, 

 occurs among the species of coral-dwelling stomatopods of 

 Enewetak (Table 3). Gonodact\^lus incipiens is the most 

 ubiquitous species, and H. gl^iptocercus. G. smithii, 

 G. platysowa, G. micronesica, and G. insularis, respec- 

 tively, occupy increasingly restricted habitats (number of 

 sites and habitat type). Of the 10 sites sampled 

 comprehensively in 1972, the most common co-occurring 

 species assemblage includes G. incipiens, G. smithii, 

 G. plati/sorna. Although not very common, G. micronesica 

 occurs in this assemblage as well. When G. insularis is 

 present, it also is a member of the G incipiens. G. 

 smithii, G. plat\;soma assemblage. Although H. gl^ptocercus 

 frequents a wide range of habitat types, this species co- 

 occurs most often with G. incipiens alone, thus forming a 

 second major species association. 



ACKNOWLEDGMENTS 



Field work was supported by grants from the Pauley 

 Foundation and the Enewetak Marine Biological Labora- 

 tory to M. L. Reaka. We thank L. B. Holthuis for identify- 

 ing and D. M. Devaney for informing us of the new record 

 of Pseudosquilla ornata. We are grateful to A. J. Kohn for 

 helpful discussion, and M. L. Reaka thanks E. O. Wilson 

 for providing space and facilities at the Museum of Com- 

 parative Zoology, Harvard University, during manuscript 

 preparation. 



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