Rhabdochona catostomi Kayton, Kritsky & Tobias 1979

• Main Authors: Arai, Hisao P., Smith, John W.
• Format: Text
• Language: unknown
• Published: Zenodo 2016
• Subjects: Biodiversity; Taxonomy; Animalia; Nematoda; Secernentea; Spirurida; Thelaziidae; Rhabdochona; Rhabdochona catostomi; Canada; Catostomus catostomus
• Online Access: https://dx.doi.org/10.5281/zenodo.5626727; https://zenodo.org/record/5626727

Rhabdochona catostomi Kayton, Kritsky & Tobias, 1979 Description (after Kayton et al. 1979). With characteristics of the genus. Body filiform, males smaller than females. Caudal end conical with terminal spike. Mouth with two bilateral rudimentary pseudolabia, two large bilateral amphids, outer circle of cephalic papillae (inner circle apparently absent). Prostom funnel-shaped, lacking basal teeth, its inner wall with 10 longitudinal cuticular ridges terminating in anterior teeth. Cuticle lines entire vestibule. Oesophagus with anterior muscular and wider posterior glandular regions. Deirids small, bifurcate, lying slightly anterior to mid-vestibule. Males: body 8.9–14.3 long, 0.173–0.211 maximum width. Prostom 0.022–0.034, vestibule 0.134–0.174, muscular oesophagus 0.336–0.372, and glandular oesophagus 3.5–4.8 long. Deirids 0.076–0.085, nerve ring 0.204–0.238, and excretory pore 0.484 from anterior end. Tail 0.336–0.392 long, curved ventrally. Caudal alae absent. Subventral caudal papillae variable in number, 8 or 9 pre-cloacal, and 5 post-cloacal pairs (Fig. 44 A). Left spicule 0.546–0.562 long, slender, with ventral groove, its tip with ventral barb, bifurcate. Right spicule 0.151– 0.154 long, with reflected distal barb (Fig. 44 B). Length ratio of right to left spicule 1:3.62 to 1:3.65. Females: body 15.3–16.7 long, 0.248–0.292 maximum width. Prostom 0.028–0.031, vestibule 0.154–0.176, muscular oesophagus 0.375–0.417, and glandular oesophagus 4.97–6.10 long. Deirids 0.090–0.097 and nerve ring 0.227–0.284 from anterior end [position of excretory pore not stated]. Tail 0.227–0.280 long, usually straight (Fig. 44 C). Vulva post-equatorial comprising a transverse slit surrounded by elevated labia. Mature eggs ellipsoidal, embryonated, “poles usually with complex elongate filaments”, measuring 0.031–0.036 x 0.020–0.024 (Fig. 44 D). Site: intestine Host: Catostomus catostomus Distribution: Alberta Record: Kayton et al. 1979 : Published as part of Arai, Hisao P. & Smith, John W., 2016, Guide to the Parasites of Fishes of Canada Part V: Nematoda, pp. 1-274 in Zootaxa 4185 (1) on page 70, DOI: 10.11646/zootaxa.4185.1.1, http://zenodo.org/record/165530 : {"references": ["Kayton, R. J., Kritsky, D. C. & Tobias, R. C. (1979) Rhabdochona catostomi sp. n. (Nematoda: Rhabdochonidae) from the intestine of Catostomus spp. (Catostomidae). Proceedings of the Helminthological Society of Washington, 46, 224 - 227."]}