RT Journal Article SR Electronic T1 On Leptaenisca, a new genus of brachiopod from the lower Helderberg group JF American Journal of Science JO Am J Sci FD American Journal of Science SP 238 OP 240 DO 10.2475/ajs.s3-40.237.238 VO s3-40 IS 237 A1 Beecher, Charles Emerson YR 1890 UL http://www.ajsonline.org/content/s3-40/237/238.abstract AB