HAYNES: PANDALIDAE. HIPPOLYTIDAE, AND CRANGONIDAE LARVAE 



Table 3.— Principal morphological characteristics and number of larval stages of known larvae of pan- 

 dalid shrimp of the northern North Pacific Ocean. + = yes; - = no. 



on); telson does not widen posteriorly, has > 1 pair of 

 lateral spines (Stage FV on). 



The principal morphological characters and 

 number of larval stages of known larvae of pandalid 

 shrimp of the northern North Pacific Ocean are sum- 

 marized (Table 3, modified from Haynes 1980b). 



Genus Pandalopsis Bate 



Larval development abbreviated; larvae relatively 

 large (> 10.0 mm in Stage I). In all described stages, 

 rostrum with teeth; carapace without denticles; 

 antennal flagellum as long as or longer than body; 

 thoracic appendages noticeably long and thin; ab- 

 dominal somites without spines or spinules, somites 

 not flared laterally. In Stage I, pereopods seg- 

 mented; telson with at least 12 -i- 12 setae; telson 

 jointed with abdominal somite 6. 



Pandalopsis coccinata Urita 



Only Stage I described, known parentage; figure 7 

 in Kurata (1964a). 



Eyes partially fused with carapace; antennal fla- 

 gellum same length as body; mandibular palp with 3 

 segments; seta on basipodite of maxillule; rudimental 

 exopodite on maxilliped 3 and pereopods 1 and 2; 

 telson discoid with 55 or 56 setae (Fig. 3). Length: 

 Stage 1, 15.5 mm. Range: Japan (Kurata 1964a), no 

 depth given. 



Pandalopsis dispar Rathbun 



Possibly 7 larval stages. 



Stage I, known parentage; Stages II, III, and V?, 

 from plankton; figures 11-13 in Berkeley (1930). 



1 . mm 



Figure 3. -Telson, Stage I zoea of Pandalopsis 

 coccinata. 



In all stages, basipodite of maxillule without sub- 

 terminal seta. In Stage I, eyes sessile; antennal fla- 

 gellum about 1/4 longer than body. Telson fan 

 shaped in early stages. Until at least Stage V, man- 

 dibles without palps; developed exopodites on maxil- 

 liped 3 and pereopods 1-2. Length: Stage I, 10.0 

 mm. Range: Pribilof Islands, Bering Sea to Man- 

 hattan Beach, OR; depth, 46-649 m (Butler 1980). 



Key II. — Larval stages of Pandalopsis dispar. 



1. Rostrum curves dorsally (Fig. 4); exopodites 

 on pereopods without natatory setae . . . Stage I 



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