Wong & Anderson 1990. Ancyracanthopsis winegardi n. sp. (Nematoda: Acuarioidea) from Pluvialis squatarola (Aves: Charadriidae) and Ancyracanthus [Ancyracanthopsis] heardi n. sp. from Rallus longirostris (Aves: Rallidae), and a review of the genus. Canadian Journal of Zoology, 68(6) 1990: 1297-1306