Telorchis gutturosi sp. n. (Trematoda: Telorchiidae) from Graptemys pseudogeographica Gray in Nebraska, with Reports of Additional Species of Trematodes from Nebraska Turtles

Abstract

One species of digenean is described and 8 others reported from turtles in Nebraska. Telorchis gutturosi, described from Graptemys pseudogeographica, resembles T. stossichi, T. pseudoaculeatus, and T. pleroticus in having an acetabulum significantly smaller than the oral sucker, but differs by possessing a pharynx which is as large as the acetabulum and having the ovary only 11o the body length from the acetabulum. Telorchis necturi is considered the senior synonym of T. cryptobranchi; Graptemys pseudogeographica is a new host. Hapalorhynchus stunkardi is reported for the first time since its descrintion. Based on new morphological evidence, the generic diagnosis of Hapalorhynchus is emended and a key to the species provided. Spirorchis scripta, S. parvus, Protenes angustus, and Eustomos chelydrae are reported for the first time from Nebraska. Graptemys pseudogeographica is a new host for Heronimus mollis; Kinosternon flavescens is a new host for Telorchis corti. Twenty-one species of platyhelminth parasites have been reported from Nebraska turtles (Brooks and Mayes, 1975). The present study reports seven additional species, one of which is described as new, and new hosts for two previously reported species. Worms were removed from the host, flattened with slight coverslip pressure or not flattened (spirorchiids), fixed with AFA, stored in 70% ethanol, stained with Mayer's hematoxylin or Mayer's carmalum, and mounted in Canada balsam for study as whole mounts. Measurements are in micrometers unless otherwise stated; figures were drawn with the aid