TN00454 RIVER SNAIL LITHASIA GENICULATA
TN00454PHYSICAL DESCRIPTION: SHELL OF THE FORM GENICULATA IS SHORT AND QUITE THICK, EPIDERMIS IS A YELLOWISH-GREEN TO BROWN COLOR, SUTURES ARE NOT IMPRESSED, BUT ARE REGULAR AND DISTINCT, BODY WHORL IS MARKED BY A ROW OF TUBERCLES SLIGHTLY BELOW THE SUTURE BETWEEN THE BODY AND PENULTIMATE WHORLS, THERE IS USUALLY ONE ROW OF TUBERCLES PRESENT, BUT OCCASIONALLY A SECOND AND LESS PROMINENT ROW DEVELOPS, APERTURE IS ELLIPTICAL IN OUTLINE, IS A CALLUS ON THE PARIETAL WALL UNDER THE TUBERCLED SHOULDER OF THE BODY WHORL AND A SECOND SMALL CALLUS ABOVE THE SINUS IN THE VENTRAL MARGIN OF THE APERTURE, INSIDE OF THE APERTURE IS WHITE, L. GENICULATA IS VERY SIMILAR TO L. SALEBROSA, BUT DIFFERS IN HAVING ONLY ONE ROW OF TUBERCLES, WHORLS WHICH ARE MORE SHOULDERED THAN IN L. SALEBROSA, AND TUBERCLES LARGER AND LESS NUMEROUS THAN IN L. SALEBROSA *TN5587*
References for Life History Codes
3895, 2100
Comments on Life History Codes