FIGURE 1 in Using Gordiid cysts to discover the hidden diversity, potential distribution, and new species of Gordiids (Phylum Nematomorpha)

FIGURE 1. Photomicrographs of gordiid cyst and larval types recovered from Physa acuta snails collected in Payne County, Oklahoma. (A) Cyst of Gordius sp. Note the lack of spines on the preseptum and tighly double folded larva. Scale bar = 25 Μm. (B) Cyst of Paragordius sp. Note the characterisitc spines on the preseptum (black arrow) and double folding of the postseptum (white arrow) never reaching the posterior end of the preseptum. Scale bar = 15 Μm. (C) Cyst of Chordodes/Neochordodes sp. Note the single folding position of the postseptum and relatively small spines on the preseptum. Scale bar = 10 Μm. (D) Larva of Gordius sp. in the process of folding. Note the characteristic single spine on the posterior end of the postseptum (arrow). Scale bar = 15 Μm. (E) Unencysted larva of Paragordius sp. Note the characteristically long spines of the outer hooks of the preseptum (black arrow) and characteristic granules of the pseudointestine (white arrow). Scale bar = 15 Μm. (F) Unencysted larva of Chordodes/Neochordodes sp. Note the equal length ratio of the prespeptum and postseptum and relatively small spines on the preseptum. Scale bar = 10 Μm.