GOPALAKRISHNAN: BIOLOGY AND TAXONOMY OF NEMATOSCELIS 



B 



Carapace 

 lateral view 



Rostrum 

 dorsal view 



01 mm 



b 



c 



d 



f 



Figure Z.-A, terminal spines on lai^^al telson: a, Nematoscelis gracilis, N. microps, N. tenella, N. atlantica, and A'^. lobata; b, N. difficilis 

 and N. megalops. B, carapace and rostrum of furcilia larvae of Nematoscelis: a, N. microps; b, N. tenella; c, N. gracilis; d, N. atlantica; e, 

 N. m£galops;f, N. difficilis. 



Sulu and Celebes seas in the region of the Indo- 

 Australian Archipelago (Gopalakrishnan 1974). 

 The distribution of A^. atlantica appears not to 

 extend into this area. Within each species, the 

 body sizes of metanauplii ranged from 0.8 to 1.0 

 mm. However, body size differences among all 



species became apparent from the first calyptopis 

 stage onwards (Table 1). It is at this stage that the 

 larvae start feeding (Gopalakrishnan 1973). 

 Evidently N. tenella larvae are the smallest, and 

 N. megalops the largest. Length measurements of 

 furcilia larvae also show size differences among 



Table l.-Body lengths (mm) of calyptopis stages of Nematoscelis. (Medians were 

 based on 10 to .36 individuals of each species for each stage.) 



'Data taken from Gopalattrishnan (1973). 



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