AMBLER: SPECIES OF MUNIDOPSIS OFF OREGON 



Material. — Munidopsis subsquamosa: Holotype, 

 USNM 21314, female 20 mm CL, Albatross stn 

 3361, 6°10.0' N, 83°6.0' W, 2,692 m; USNM 

 171348, male, 57 mm CL, stn Coos Bay #A, 

 43°17.3' N, 125°49.3' W, 0TB 76, 3,000 m; OSUBI 

 00185, male, 70 mm CL, stn CP-3-C, 45°12.0' N, 

 127°32.5' W, BMT 324, 2,809 m; OSUBI 00186, 

 female with parasite, 41 mm CL, stn NAD 20A, 

 44°30.1 ' N, 125°24.3' W, 0TB 64, 2,772 m; OSUBI 

 00187, male, 23 mm CL, stn CP-l-E, 44"31.3' N, 

 125°35.5' W, 0TB H-1, 2,736 m; OSUBI 00184, 

 male with isopod parasite, stn CP-l-E, 44°40.5' N, 

 125°40.0' W, 0TB 18, 2,850 m; 46 uncataloged 

 specimens from off Oregon, smallest ovigerous 

 female 54 mm CL. 



Comparative material. — Munidopsis geyeri: 

 Holotype, USNM 128812, male, 25 mm CL, 

 Alaminos stn 69-A-11-92, 23°30' N, 95° W, 2,928- 

 3,001 m; TAMU 2-0574, female, 38 mm CL, male, 

 47 mm CL, Alaminos stn 70-A-10-48, 14°29.5' N, 

 74°28.8' W, 4,154 m; TAMU 2-0575, male, 46 mm 

 CL, male, 18 mm CL, Alaminos stn 70-A-10-50, 

 15°50' N, 77°24.5' W, 2,654-2,791 m. 



were examined on the Oregon specimens of M. 

 subsquamosa, the holotype of M. subsquamosa, 

 and five specimens of M. geyeri, including the 

 holotype. The range of variations of these charac- 

 teristics for the Oregon specimens included those 

 found for M. geyeri, except for the number of teeth 

 on the lateral edges of the rostrum (Table 6). With 

 the addition of the Oregon specimens, the 

 maximum size and range of variation of M. sub- 

 squamosa is extended. Mayo (1974), who collected 

 three specimens of M. geyeri, proposed that M. 

 geyeri might become a synonym of M. sub- 

 squamosa when more material was available. 



Alcock ( 1894, 1901 ) stated that M. subsquamosa 

 var. pallida differs from M. subsquamosa by the 

 former having only two spines on the gastric area 

 of the carapace. Henderson (1885) did not state 

 how many gastric spines the holotype has; I found 

 only two. 



Five of the Oregon female specimens have 

 rhizocephalan parasites on the ventral side of the 

 abdomen. Two other specimens had isopod para- 

 sites under the carapace on the posterior branchial 

 area. 



Remarks. — Munidopsis geyeri found in the 

 Caribbean and Gulf of Mexico is here synonymized 

 with M. subsquamosa from the Pacific and with M. 

 subsquamosa var. pallida from the Indian Ocean. 

 When compared with closely related species (M. 

 tuftsi, M. aculeata, and M. crassa), M. geyeri and 

 M. subsquamosa are identical (Table 5). Munidop- 

 sis subsquamosa and M. aculeata have similar 

 carapace ornamentation, but with M. sub- 

 squamosa the scalelike tubercles are larger and 

 closer together. The two species are also distin- 

 guished by characteristics 1, 3, 5, and 7 of Table 5. 

 Munidopsis crassa and M. tuftsi have smaller, 

 more spiny tubercles on the carapace and usually 

 have longer, stouter eyespines than M. sub- 

 squamosa. 



The distinctions given by Pequegnat and 

 Pequegnat ( 1970) to distinguish M. geyeri from M. 

 subsquamosa, and other taxonomic charcteristics 



Distribution. — Munidopsis subsquamosa occurs 

 mainly in the eastern part of Cascadia Basin from 

 1,829 to 3,000 m. This species is cosmopolitan, 

 since it has also been collected at 3,431 m off 

 Yokohama, Japan (Henderson 1888), 1,471 and 

 1,672 m off Panama (Faxon 1895), 3,299 m in the 

 Bay of Bengal (Alcock 1894, 1901), 2,938-3,001 m 

 in the southwest Gulf of Mexico (Pequegnat and 

 Pequegnat 1970), 4,154 m in the Colombian Basin 

 (Pequegnat and Pequegnat 1971), 2,790-2,650 m 

 south of Jamaica (Pequegnat and Pequegnat 

 1971), and 3,111-3,496 m off Haiti (Mayo 1974). 



Munidopsis verrucosus Khodkina 1973 



Munidopsis verrucosus Khodkina 1973:1156-1159 

 (original description), fig. 1, 2. 



Material. — Munidopsis verrucosus, USNM 



' Gastric area of carapace cracked on one specimen. 



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