TN00365 PALE LILLIPUT PEARLY MUSSEL TOXOLASMA CYLINDRELLUS
TN00365PHYSICAL DESCRIPTION: SHELL IS SMALL, ELONGATE, AND ELLIPTICAL, DORSAL AND VENTRAL MARGINS ARE ALMOST PARALLEL, WHILE THE ANTERIOR END IS ROUNDED AND THE POSTERIOR MARGIN IS SLOPING AND ROUNDED TOWARD THE BASE, VALVES ARE RATHER SOLID, SUBINFLATED WITH A SOMEWHAT FULL BEAK, BEAK SCULPTURE HAS NOT BEEN RECORDED, POSTERIOR RIDGE IS LOW OR WANTING, SURFACE OF SHELL IS SMOOTH, EPIDERMIS IS THICK AND CLOTH- LIKE AND IS TAWNY OR YELLOWISH-GREENISH IN COLOR AND RAYLESS, LEFT VALVE HAS 2 SHORT STUMPY PSEUDOCARDINAL TEETH, A NARROW INTERDENTUM AND 2 SHORT LATERALS, RIGHT VALVE HAS ONE TRIANGULAR PSEUDOCARDINAL TOOTH AND A SINGLE LATERAL WHICH SOMETIMES HAS A SLIGHT RIDGE AT ITS BASE, BEAK CAVITIES ARE SHALLOW, MUSCLE SCARS ARE WELL-IMPRESSED, NACRE IS WHITISH OUTSIDE THE PALLIAL LINE, WHILE INSIDE IT IS A RICH COPPERY COLOR, SHELL BECOMES THINNER AND MORE IRIDESCENT BEHIND, SHELLS OF THE FEMALE ARE ONLY SLIGHTLY DISTINCT FROM THE MALE, HAVING A FAINT MARSUPIAL SWELLING NEAR THE POSTERIOR PART OF THE BASE, THIS MUSSEL MAY BE DISTINGUISHED FROM CLOSELY RELATED SPECIES BY THE ELONGATE ELLIPTICAL SHELL, YELLOWISH EPIDERMIS, A USUALLY LIGHTER COLORED NACRE AND A NACRE OUTSIDE THE PALLIAL LINE WHICH REMAINS LIGHT IN COLOR, WHERE T. L. LIVIDUS AND T. CYLINDRELLUS OCCUR TOGETHER, CYLINDRELLUS IS FASTER GROWING AND REACHES A LARGER SIZE *TN5587* REPRODUCTION: GENUS IS BRADYTICTIC *TN5587*
References for Life History Codes
816, 2670, 2203, 2669, 4205
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