AMBLER: SPECIES OF MUNIDOPSIS OFF OREGON 



Figure 5. — Munidopsis yaquinensis, 

 new species, female holotype, dorsal 

 view. 



'Ill' 



cm 



Basal segment of antennal peduncle with two 

 stout teeth; second, third, and fourth segments 

 without teeth or spines; anterior fourth segment 

 with outer rounded extension. 



Inner margin of third maxilliped smooth. 



Chelipeds with epipodites, chelipeds covered 

 with very small ridges with setae, carpus with 

 strong inner ridge, merus triangular with strong 

 dorsal ridge, right finger length 41% of chela 

 length (6.4 mm), right cheliped length 19.0 mm. 

 Pereiopods without epipodites, covered sparsely 

 with only short setae; propodus, carpus, and merus 

 triangular in cross section, with prominent ridges 

 on anterodorsal side. 



Remarks. — The seven Oregon specimens are 

 similar in all important characteristics, with the 

 exception of an OSUBI 01583 specimen, which has 

 an extra long, apparently deformed, rostrum with 

 notched sides. 



Munidopsis yaquinensis differs distinctly from 

 all other known species. It most closely resembles 

 M . platirostris (Milne-Edwards and Bouvier 1897) 

 and M. liuida (Pequegnat and Pequegnat 1971). 



Etymology. — Munidopsis yaquinensis is named 

 for the Oregon State University oceanographic 

 ship RV Yaquina. 



Distribution.— Occurs at 2,763 and 2,377 m in 

 Cascadia Basin. 



Munidopsis cascadia n. sp. (Figure 6) 



Ma^ermZ.— Holotype, USNM 171338, female, 54 

 mm CL, stn CP-l-E, 44=35.5 ' N, 125=^35.4 ' W, 0TB 

 112, 2,810 m; Paratypes: USNM 134658, male, 45 

 mm CL, stn CP-l-E, 44°46.2' N, 125°01.8' W, 0TB 

 49, 2,800 m; USNM 171339, female, 38 mm CL, stn 

 CP-2-A, 45°59.1 ' N, 126°40.1 ' W, BMT 256, 2,743 



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