TN00045 SPECTACLE CASE PEARLY MUSSEL CUMBERLANDIA MONODONTA
Behavior: Dispersal, is during the larval stage and only by the movement of the host species *2100*. Origin: The origin of this species is native *3895*. PHYSICAL DESCRIPTION: SHELL GREATLY ELONGATED, ARCUATE, AND SUBINFLATED, SHELL THIN IN YOUNG BUT BECOMES THICK AND SOLID IN OLD SPECIMENS, BEAK SCULPTURE EVIDENT IN YOUNG, CONSISTING OF 3-4 STRONG STRAIGHT RIDGES RUNNING PARALLEL WITH THE GROWTH LINES, ANTERIOR AND POSTERIOR ENDS OF SHELL ROUNDED WITH A SHALLOW DEPRESSION NEAR THE CENTER, GROWTH LINES PRONOUNCED, EPIDERMIS GREENISH-BROWN TO BLACK AND RAYLESS IN YOUNG, THICK AND DULL BLACK IN OLD SHELLS, PSEUDOCARDINAL TOOTH SMALL AND TUBERCULAR IN YOUNG, 2 LATERAL TEETH IN LEFT VALVE AND ONE IN RIGHT, IN OLD SPECIMENS THE LATERALS MERGE INTO THE HINGE LINE, BEOCMING INDISTINCT, PSEUDOCARDINALS BECOME GREATLY REDUCED WITH A SINGLE TOOTH IN RIGHT VALVE FITTING INTO A DEPRESSION IN THE LEFT MUSCLE SCARS IMPRESSED, ANTERIOR ONES ROUGH, POSTERIOR ONES ELLIPTICAL, NACRE COLOR WHITE, GRANULAR AND PITTED, MOSTLY IRIDESCENT IN YOUNG BUT ONLY IRIDESCENT POSTERIORLY IN OLD SPECIMENS *TN5587* REPRODUCTION: GRAVID FEMALES HAVE BEEN COLLECTED DURING THE FIRST WEEK OF MAY, ALL 4 GILLS OF FEMALE MAY BECOME GRAVID DURING BREEDING SEASON, BUT INNER PAIR CONTAIN MORE GLOCHIDEA THAN OUTER PAIR, GLOCHIDEA ARE VERY SMALL, SEMI-ELLIPTICAL WITH THE VENTRAL MARGIN ACUTELY ROUNDED AND HINGE LINE LONG AND STRAIGHT, HAS BEEN SUGGESTED THAT 2 BROODS ARE PRODUCED PER SEASON, MAY OCCASIONALLY BE HERMAPHRODITIC *TN5587* BEHAVIOR: USUALLY IMBEDDED UP TO 80% OF ITS SHELL *TN5587* AQUATIC AND TERRESTRIAL ASSOCIATIONS: HAS BEEN REPORTED IN MUD AROUND ROOTS OF EEL GRASS *TN5587*
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References for Life History Codes
3895, 2100, TN5587
Comments on Life History Codes