gould striae toothcomb 0Qf900 Lampsilis aphanitic pigtoe sporophyll pilose Pallida convexly mucro pubescence mithun bicarinate spinous fendered Typic papillae groundmass axials satiny cincinni sericeous venter roughened micritic Mirca sternites subobsolete tubercles hindneck speckling perthite Mesoporous 25Qf000 downcurved striations