| Mopaliidae ()	 | 
	
		
	
	| 5.1 cm TL (male/unsexed) | 
| 
benthic; marine | 	
	
	
	
		| Eastern Pacific:  Canada, Alaska to Mexico. | 
	
		
	| 
	Girdle:  Wide with sparse flat glassy hairs having several recurved spines at the base.  Mucro:  Strongly posterior.  Valves:  Beaked slightly.  Central areas:  Longitudinally ribbed and where each rib touches the lateral area there is a granular pustule.  Pustules:  Form a heavy lateral rib;  from this rib the central area rib continues at an oblique angle on the lateral areas until it again reaches a granular pustule at the posterior edge of the valve;  pustules form another granular rib along the posterior edge of each valve. Color:  Ranging from dull gray, grays with white, greens with yellows, whites with yellows, greens with red, greens with maroon with white mixed in (Ref. 296).  Body:  Oval to elongate (Ref. 290).  Girdle:   Medium wide nude; microscopically granulated fleshy.  Mucro:  Anterior.  Central areas:  Smooth.  Lateral areas:  Defined by a slightly raised rib with a smooth area inside.  Color of valves:  Blood red with white lightning marks.  Color of girdle:  Cream (Ref. 296). | 
	
	
		| Intertidal to shallow subtidal (Ref. 290). | 
	
	
    | 
        Not Evaluated (N.E.) Ref. 123251)	
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