TN00055 YELLOW-BLOSSOM PEARLY MUSSEL EPIOBLASMA FLORENTINA FLORENTINA
PHYSICAL DESCRIPTION: MEDIUM SIZED, SELDOM REACHING OVER 60 MM IN LENGTH, SHELL IRREGULARLY ELLIPTICAL OR OBOVATE IN OUTLINE, VALVES INEQUILATERAL, SUBINFLATED AND SUBSOLID, ANTERIOR END REGULARLY ROUNDED, POSTERIOR END IN MALES PROTRUDES ONLY SLIGHTLY BUT IS MORE ROUNDED IN FEMALES, HINGE LIGAMENT SHORT, POSTERIOR RIDGE OF MALE APPEARS FAINTLY DOUBLED, ENDING IN A SLIGHT BIANGULATION POSTERIORLY, A SHALLOW RADIAL DEPRESSION IN FRONT OF POSTERIOR RIDGE, FEMALE SHELL HAS A ROUNDED, THIN MARSUPIAL SWELLING DEFINED FROM THE REST OF THE SHELL BY ANTERIOR AND POSTERIOR SULCI, VENTRAL MARGIN OFTEN SERRATED, UMBOS QUITE FULL, ELEVATED, LOCATED SLIGHTLY ANTERIOR OF THE MIDDLE IN MALES AND IN THE ANTERIOR THIRD IN FEMALES, SHELL SURFACE USUALLY BROKEN BY UNEVEN GROWTH LINES, PERIOSTRACUM DULL BROWNISH- OR YELLOWISH-GREEN WITH MANY FEEBLE GREEN RAYS, DISTRIBUTED MORE OR LESS EVENLY OVER THE ENTIRE SURFACE, PSEUDOCARDINALS SMALL, TRIANGULAR AND DOUBLE IN BOTH VALVES WITH A SLIGHT INTERDENTUM SEPARATING THEM FROM THE LATERALS, LATERALS ARE SHORT, CURVED, AND DOUBLE IN LEFT VALVE, SINGLE OR SOMETIMES DOUBLE IN RIGHT, UMBONAL CAVITY SHALLOW, ANTERIOR MUSCLE SCARS WELL IMPRESSED, POSTERIOR SCARS SHALLOW, PALLIAL LINE DISTINCT ONLY ANTERIORLY, NACRE BLUISH WHITE, SHELL THICKER ANTERIORLY, POSTERIOR END OF FEMALE ESPECIALLY THIN AND IRIDESCENT, THIS FORM IS MORE SWOLLEN THAN THE SMALL TRIBUTARY FORM, WALKERI, MALES OF THIS FORM AND WALKERI DIFFER IN THE PERCENTAGE OF SHELL HEIGHT TO SHELL LENGTH, FEMALES DIFFER IN PERCENTAGE OF SHELL DIAMETER TO SHELL LENGTH *TN5587* REPRODUCTION: PROBABLY BREEDS DURING WINTER *TN5587*
References for Life History Codes
816, 789, 4205, TN5587
Comments on Life History Codes