PECTEN SITE

Collection Arne Ghys

FAMILY	:	Pectinidae
SUBFAMILY	:	Pectininae
TRIBE	:	Amusiini
GENUS	:	Ylistrum
Synonyms	:

Pictures

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Maoao Bay, Taipei County, NE. Taiwan dived in sand at 20-30 m depth H. 112.6 mm - W. 118.4 mm

Maoao Bay, Taipei County, NE. Taiwan taken by dive in sand at 20-30 m depth H. 115.3 mm - W. 119.0 mm

Remarks

• large pectinid (90-120 mm) with flat valves and only internal ribs (37-50) on both valves
• colour of the left (upper) valve is light brown
• Amusium pleuronectes (Linnaeus, 1758) is smaller in size (60-90 mm) and has less internal ribs (24-35)
• sometimes confused with Ylistrum balloti (Bernardi, 1861) but the internal colouration is different:
  

  	Ylistrum balloti colouration inside is white colouration of the left (upper) valve is brown with a lot of black spots
  	Ylistrum japonicum taiwanicum colouration inside is white with a yellowbrown margin colouration of the left (upper) valve is light brown without the black spots