AMBLER: SPECIES OF A/ l/MDOPS/S OFF OREGON 



CHELIPED 



SECOND ANTENNAE 



INNER EYESPINE 

 OUTER EYESPINE 



ANTEROLATERAL SPINE "^^^^^NAL SPINE 



ANTERIOR BRANCH OF CERVICAL GROOVE 

 FIRST LATERAL SPINE 



POSTERIOR BRANCH OF CERVICAL GROOVE 



AMBULATORY LEGS 



^ ABDOMINAL SEGMENTS 



<!M»* 



Figure 2. — Generalized drawing of the genus Munidopsis. 



Anoplonotus Smith 1883:50 (original description). 



Galathopsis Henderson 1885:417 (original de- 

 scription). 



Galacantha Milne-Edwards 1880:52 (original de- 

 scription); Henderson 1888:166 (redescription, 

 argues for separate genus); Milne-Edwards and 

 Bouvier 1894:268, 1897:55 (redescriptions). 



Diagnosis. — Integument heavily calcified; 

 carapace longer than wide, covered with spines, 

 sometimes with setae, and with rugae often in 

 transverse rows; dorsal surface of carapace with 

 well-defined cardiac and gastric areas, gastric 

 area separated from branchial area by cervical 

 groove; anterolateral borders of carapace usually 

 spinose or dentate but occasionally entire; an- 

 terior border of carapace sometimes with small 

 supra-antennal spine or tooth, never with a long 

 supraorbital spine; eyes small, unfaceted, and 



devoid of pigment; ocular peduncle sometimes 

 extended beyond cornea as a spine (eyespine); 

 rostrum well developed, triangular or spatulate; 

 antennular peduncle with short flagellum; anten- 

 nal peduncle four jointed, usually with long flagel- 

 lum; chelipeds either longer or shorter than next 

 three ambulatory legs, epipodite present some- 

 times on chelipeds and occasionally on ambula- 

 tory legs; moderate number of large eggs, a few 

 millimeters in diameter. 



The genus Munidopsis (including Galacantha) 

 has about 140 species with 112 of them covered in 

 checklists by Doflein and Balss (1913) and 101 in a 

 checklist by Benedict (1902). The genus has been 

 divided into five groups called either genera, sub- 

 genera, or groups (Henderson 1888; Milne-Ed- 

 wards and Bouvier 1894; Alcock 1901; Tirmizi 

 1966). Faxon (1895) and Chace (1942) recom- 

 mended a single genus Munidopsis because many 



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