Rhabdochona milleri Choquette, 1951
publication ID |
https://doi.org/ 10.11646/zootaxa.4185.1.1 |
publication LSID |
lsid:zoobank.org:pub:0D054EDD-9CDC-4D16-A8B2-F1EBBDAD6E09 |
DOI |
https://doi.org/10.5281/zenodo.5626736 |
persistent identifier |
https://treatment.plazi.org/id/038FB248-FFFA-FFFD-89B9-C5C7251C99C7 |
treatment provided by |
Plazi |
scientific name |
Rhabdochona milleri Choquette, 1951 |
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Rhabdochona milleri Choquette, 1951
Description (after Choquette 1951a, and Moravec & Arai 1971). With characteristics of the genus.
Male (1 specimen): 6.94 long, 0.176 maximum width. Prostom funnel-shaped, 0.018 long, with distinct basal teeth, lined internally with longitudinal ribs forming teeth directed forwardly (exact number not determined). Vestibule including prostom 0.144, muscular oesophagus 0.300, and glandular oesophagus 1.36 long. Small, bifurcate deirids 0.063, nerve ring 0.168, and excretory pore 0.237 from anterior end. Eight pairs of subventral and one pair of [presumably lateral] pre-cloacal papillae, and six pairs of post-cloacal papillae—five pairs subventral, one pair lateral ( Fig. 48 View FIGURE 48 A). Left spicule 0.402 long, with relatively blunt distal tip, and “slightly outlined” bifurcation ( Fig. 48 View FIGURE 48 B). Right spicule 0.129 long, with dorsal barb at distal end ( Fig. 48 View FIGURE 48 A). Length ratio of right to left spicule 1:3.12. Tail conical, 0.300 long, with sharp cuticular spike at tip.
Females (3 specimens): 10.91–12.10 long, 0.136–0.163 maximum width. Prostom funnel-shaped, 0.021–0.024 long, with distinct basal teeth, and 14 teeth projecting forwardly ( Fig. 48 View FIGURE 48 C,D). Vestibule including prostom 0.111– 0.138, muscular oesophagus 0.270–0.297, and glandular oesophagus 1.59–2.35 long. Medium sized bifurcate deirids 0.063–0.081, nerve ring 0.186–0.189, and excretory pore 0.261 from anterior end. Vulva slightly postequatorial, 5.03–6.12 from posterior end. Eggs oval, 0.030–0.036 x 0.018–0.021. Surface of advanced eggs (containing larvae) smooth; poles provided with numerous fine filaments ( Fig. 48 View FIGURE 48 E), those on one pole arranged mostly in parallel giving the appearance of a short ribbon-like filament with the end frayed ( Fig. 48 View FIGURE 48 E, lower egg). Tail conical, 0.210–0.243 long, with sharp cuticular point.
Comment: Moravec & Arai (1971) stated that “in many important features R. milleri resembles R. ovifilamenta , and subsequent detailed studies might prove their conspecificity”.
Site: intestine
Hosts: Carpiodes cyprinus (7); Moxostoma erythrurum (2); Moxostoma macrolepidotum (1, 2, 6); Oncorhynchus
clarkii (3); Oncorhynchus mykiss (3); Prosopium coulterii (3); Prosopium williamsoni (4, 5); Rhinichthys
cataractae (4, 5); Salvelinus fontinalis (3); Salvelinus malma (3)
Distribution: Alberta, British Columbia, Ontario, Quebec
Records: 1. Choquette 1951a (QC); 2. Dechtiar 1972b (ON); 3. Mudry & Anderson 1977 (AB); 4. Anon. 1978
(BC); 5. Arai & Mudry 1983 (BC); 6. Dechtiar & Christie 1988 (ON); 7. Dechtiar & Nepszy 1988 (ON)
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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