LANG and YOUNG: LARVAL DEVELOPMENT OF HYPOCONCHA SABULOSA 



Figure 3: — Hypoconcha sabulosa: antennule of zoeal stages I( A), II (B), III (C). and megalopa (D); antenna of zoeal stages 1(E), II (F), 



and II (G), and megalopa iH). 



PI to P5 (Figure IB) — Conspicuous buds, first 

 pereiopod distinctly biramous, four plumose setae 

 on rudimentary exopodite (Figure 7M). 



Zoea III 



Carapace (Figure IC, c) similar to stage II, a 

 small blunt lateral spine near ventral carapace 

 margin and posterior to second transverse groove 

 present in some individuals; eyestalk with an- 

 terodorsal papilla. 



Abdominal somites (Figure Ic) with elongated 

 pleopod buds; sixth somite and telson distinctly 

 segmented. 



Telson (Figure 2C) normally 6+6 with very 

 small outer spine, hairlike plumose seta, and 4 



plumose setae; 2 zoeae 7+7 with 5 plumose setae, 

 uropods with simple endopodite lobe and 13 or 14 

 setae on exopodite. 



ANl (Figure 3C) — Two-segmented; inner 

 ramus a simple lobe; outer ramus with three ter- 

 minal stout aesthetascs, three or four terminal 

 fine processes (either simple setae or aesthetascs), 

 three or four subterminal aesthetascs; basal seg- 

 ment with three stout plumose setae and three or 

 four short plumose setae, also two short plumose 

 setae (not figured) or proximal margin. 



AN2 ( Figure 3G) — With simple two-segmented 

 endopodite and 18-21 plumose setae on scale. 



MN (Figure 4B) — With simple palp. 



MAXl (Figure 5C) — With two-segmented en- 

 dopodite, distal segment with two or three termi- 



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