Capillospirura pseudoargumentosa ( Appy & Dadswell, 1978 ) Appy & Anderson, 1982

Arai, Hisao P. & Smith, John W., 2016, Guide to the Parasites of Fishes of Canada Part V: Nematoda, Zootaxa 4185 (1), pp. 1-274 : 93-95

Capillospirura pseudoargumentosa ( Appy & Dadswell, 1978) Appy & Anderson, 1982

Synonym: Caballeronema pseudoargumentosus Appy & Dadswell, 1978

Description (after Appy & Dadswell 1978). With characteristics of the genus.

Males:7.7 –10.0 long, 0.073–0.087 wide. Buccal cavity 0.065–0.090 long. Muscular oesophagus 0.277–0.439, glandular oesophagus 1.466–1.931 ( Fig. 58 A), and tail 0.087–0.127 long. Nerve ring 0.135–0.225, excretory pore 0.259–0.394 and testis 2.463–4.018, respectively, from anterior end. Right spicule 0.110–0.138 and left spicule 0.492–0.598 long; ratio of right spicule to left spicule length 1:4.5. Right spicule has notch in distal tip; left spicule has ridge beginning near proximal end and extending posteriorly to near distal tip. Four pre-cloacal and six postcloacal papillae. Area rugosa comprises about seven longitudinal rows of cuticular elevations ( Fig. 58 B). Caudal alae present.

Females:12.0–18.5 long, 0.089–0.109 wide. Buccal cavity 0.072–0.092 long. Muscular oesophagus 0.292–

0.486, glandular oesophagus 1.456–1.962 long and tail 0.052–0.077 ( Fig. 58 C) long. Nerve ring 0.149–0.224,

excretory pore 0.276–0.426, anterior ovary 1.528–2.025 and vulva 5.599–8.493 ( Fig. 58 D), respectively, from

anterior end. Eggs 0.038–0.044 x 0.019–0.022. One polar plug with four to10 filaments.

Site: alimentary tract

Hosts: Acipenser brevirostrum (1, 2, 3, 4); Acipenser fulvescens (5); Acipenser oxyrinchus (3); Oncorhynchus mykiss (4)

Distribution: Atlantic

Records: 1. Appy & Dadswell 1978; 2. Appy & Dadswell 1980; 3. Appy & Anderson 1982; 4. Appy & Dadswell 1983 (EX, AT)

Figures

FIGURE 58. Capillospirura pseudoargumentosa (Appy & Dadswell, 1978) Appy & Anderson, 1982. A. male, anterior end; B. male, posterior end; C. female, posterior end; D. female, vulva, vagina and uterus [NB: for presentational reasons, polar filaments have been omitted from in utero eggs to avoid clutter]. (Redrawn from Appy & Dadswell 1978).