TN00301 LITTLE WINGED PEARLY MUSSEL PEGIAS FABULA
Behavior: The dispersal of this species is during the larval stage only by the movement of the host species *2100*. Origin: The origin of theis species is native *3895*. TN00301PHYSICAL DESCRIPTION: SHELL IS SMALL (ADULTS CA. 24 MM IN LENGTH), THICKENED ANTERIORLY, WITH A SHARP POSTERIOR RIDGE IN FRONT OF WHICH IS A WIDE RADIAL DEPRESSION THAT ENDS IN A BASAL SINUS, THERE IS ANOTHER RIDGE ABOVE THE POSTERIOR RIDGE, MAKING THE SHELL DECIDEDLY BIANGULATE AND TRUNCATE BEHIND, BEAK SCULPTURING CONSISTS OF HEAVY, SUBCONCENTRIC RIDGES, THESE BEING MOST PROMINENT AND PERSISTENT ON THE POSTERIOR RIDGES, EPIDERMIS IS USUALLY ERODED AWAY IN MATURE INDIVIDUALS, A FEW DARK RAYS ARE APPARENT ALONG THE BASE OF THE SHELL IN YOUNG SPECIMENS, LEFT VALVE HAS AN IRREGULAR TRIANGULAR PSEUDOCARDINAL TOOTH UNDER THE BEAK, SOMETIMES WITH A VESTIGE OF ANOTHER IN FRONT OF IT, LATERAL TEETH ARE ONLY A SHORT, FAINT IRREGULAR RIDGE, RIGHT VALVE HAS A SINGLE TRIANGULAR PSEUDOCARDINAL TOOTH IN FRONT OF THE BEAK, BEAK CAVITIES ARE RATHER DEEP AND COMPRESSED, ANTERIOR MUSCLE SCARS ARE DEEPLY IMPRESSED, NACRE IS WHITISH ON THE ANTERIOR BORDER, FLESH-COLOR OR SALMON IN THE CAVITIES, SHELLS EXHIBIT SEXUAL DIMORPHISM, A CHARACTER WHICH SEPARATES PEGIAS FROM SPECIES BELONGING TO THE GENUS ALASMIDONTA *TN5587* REPRODUCTION: SPECIES IS A WINTER BREEDER, LITTLE OTHER INFORMATION IS AVAILABLE *TN5587*
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References for Life History Codes
3895, 2100
Comments on Life History Codes