AMBLER: SPECIES OFMUNIDOPSIS OFF OREGON 



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Figure 3. — Munidopsis sp. (similar to Munidopsis bairdii) 

 USNM 171345, dorsal view of carapace. 



Distribution. — Munidopsis sp. has only been col- 

 lected from the lower continental slope at 1,829 m, 

 which does not overlap with the depth range of M. 

 bairdii (2,377-2,940 m). 



Munidopsis ciliata Wood-Mason 1891 



Munidopsis brevimana Henderson 1885:414 (orig- 

 inal description); Henderson 1888:154 (re- 

 description), pi. 17, fig. 1, 2. 



Munidopsis ciliata Wood-Mason 1891:200 (origi- 

 nal description); Faxon 1895:84 (synonymy with 

 M. brevimana, comparison with M. nitida); 

 Faxon 1895:81-82 (M. ciliata because genus 

 sjTionomy caused prior usage of M. brevimana), 

 pi. 18, fig. 3. 



Material.— MCZ 4540, female, 27 mm CL, Alba- 

 tross stn 3392, 7°5.5' N, 79°40.0' W, 2,324 m; MCZ 

 4541 , male, 19 mm CL, Albatross stn 3393, 7°15.0 ' 

 N, 79°37.0' W, 1,867 m; USNM 171342, female, 13 

 mm CL, stn CP-l-A, 45°55.3 ' N, 125^36.1 ' W, BMT 

 194, 2,030 m; USNM 171343, 13 specimens, stn 

 CP-2-A, 45=52.5' N, 126'40.8' W, BMT 154, 2,666 

 m; OSUBI 00188, male, 15 mm CL, stn CP-l-E, 

 44°39.8' N, 125=36.4' W, BMT 184, 2,875 m; 

 OSUBI 00189, 33 specimens, stn CP-2-D, 44=53.7' 

 N, 126°33.4' W, BMT 162, 2,774 m; OSUBI 01581, 

 females, 16 mm CL, stn CP-2-A, 45°48.3' N, 

 126=28.2' W, BMT 158, 2,651 m; OSUBI 01578, 

 female, 12 mm CL, stn CP-2-C, 45=18.6' N, 

 126=31.5' W, BMT 265, 2,750 m. 



Comparative material. — Munidopsis nitida: 

 USNM 21287, female, 21 mm CL, Albatross stn 

 2140, 17=36.2 ' N, 76=46. 1 ' W, 1,768 m. Munidopsis 

 verrilli: Holotype, USNM 20556, female, 22 mm 

 CL, Albatross stn 2923, 32=40.5' N, 117=31.5' W, 

 1,504 m. 



Remarks. — The Oregon specimens differ from 

 the Albatross specimens by the shorter, stouter 

 spines on the carapace and legs; shorter setae cov- 

 ering the carapace and legs; rostrum with a nar- 

 rower base; and no extra spine between the antero- 

 lateral and antennal spines, as sometimes occurs 

 in the Albatross specimens (Figure 4). A small 

 ventral spine occurs behind the large inner eye- 

 spine on the Oregon specimens. Carapace 

 sculpturing is similar in all specimens. I conclude 

 that the observed differences are racial or varietal 

 rather than specific. All specimens are from the 

 Indian and Pacific Oceans. 



Munidopsis ciliata is closely related to M. nitida 

 Milne-Edwards, but has a more sculptured 

 carapace. Faxon (1895) suggested the differences 

 may be racial or varietal rather than specific. 

 Munidopsis nitida has only been found in the At- 

 lantic Ocean (Milne-Edwards 1880; Pequegnat 

 and Pequegnat 1970). Because of the distinct 

 differences in carapace sculpture, I consider M. 

 ciliata and M. nitida to be separate species. 



Both M. ciliata and M. nitida are closely related 

 to M. verrilli Benedict, but differ in that M. verrilli 

 has no epipods on the chelipeds or walking legs, 

 whereas M. ciliata and M. nitida have epipods on 

 only the chelipeds; M. verrilli has two spines on 

 the crest of the chela and two spines on the inner 

 edge of the merus of the cheliped, whereas M. 

 ciliata and M. nitida do not; M. verrilli does not 



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