Holorchis castex, Bray, Rodney A. & Justine, Jean-Lou, 2007
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publication ID |
https://doi.org/ 10.5281/zenodo.175744 |
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DOI |
https://doi.org/10.5281/zenodo.5641184 |
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persistent identifier |
https://treatment.plazi.org/id/03BA8782-5543-FFBF-D895-FD27FAE1DDAD |
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treatment provided by |
Plazi |
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scientific name |
Holorchis castex |
| status |
sp. nov. |
Holorchis castex n. sp.
( Figs 1–5 View FIGURES 1 – 5 )
Type-host: Diagramma pictum (Thunberg, 1792) , Haemulidae , painted sweet-lips.
Site: Digestive tract.
Type-locality: Rocher à la voile, Nouméa, New Caledonia (22°18’30’’S, 166°25’50’’E, 01/06/2006).
Prevalence: 1 of 1 (100%).
Intensity: 6.
Type-specimens: holotype MNHN JNC1848–D1 , paratypes MNHN JNC1848–D2–3 , BMNH 2006.12.6.40–41 . View Materials
Etymology: ‘Castex’ or ‘loche castex’ is the common name of the host in New Caledonia ( Laboute & Grandperrin 2000).
Description. Based on five specimens. Body elongate, large; 6,793 –8,577 × 1,145 –1,438 (7,569 × 1,317); width 16.8–18.4 (17.4)% of body-length ( Figure 1 View FIGURES 1 – 5 ). Tegument spinous to posterior extremity, sparser in hindbody. Pre-oral lobe distinct, 42–66 (51) long. Oral sucker subglobular, subterminal, with distinct groove in dorsal margin; 401–463 × 418–500 (422 × 456) ( Figure 4 View FIGURES 1 – 5 ). Ventral sucker rounded, in anterior third of body; 349–419 × 332–416 (382 × 375). Forebody 1,998 –2,376 (2,149) long; 27.7–29.4 (28.4)% of body-length. Sucker-ratios: length 1:0.87–0.94 (0.91); width 1:0.79–0.86 (0.82). Prepharynx short; mainly within posterior concavity of oral sucker, reaching 0–16 (11) posterior to oral sucker. Pharynx large, doliiform; 211–288 × 218–278 (250 × 246). Pharynx: oral sucker ratio 1:1.64–1.93 (1.86). Oesophagus short; 63–225 (141) long. Intestinal bifurcation in anterior forebody, 1,230 –1,505 (1,327) from ventral sucker. Caeca long, narrow, apparently terminate blindly near posterior extremity, terminations obscured by vitellarium, post-caecal distance approximately 249–440 (342).
Testes 2, entire, oval, almost tandem, contiguous or slightly separated, just in anterior half of hindbody; anterior 498–652 × 407–556 (581 × 508); posterior 509–699 × 468–590 (640 × 524). Intertesticular distance 0–151 (66); 0–1.76 (0.83)% of body-length. Post-testicular distance 2,407 –3,022 (2,673); 33.5–37.0 (35.3)% of body-length. External seminal vesicle long, convoluted, reaches dorsal to about mid-level of ventral sucker. Cirrus-sac oval, thick-walled with distinct layer of gland-cells between outer wall and male-duct ( Figure 2 View FIGURES 1 – 5 ). Internal seminal vesicle long, slightly undulating, with thickened muscular wall; 405–471 × 248–551 (442 × 284). Pars prostatica vesicular, subglobular, with thick wall, sparsely lined with anuclear cell-like bodies. Ejaculatory duct short, muscular, may be extended through genital pore as cirrus. Genital atrium distinct, thick-walled. Genital pore submedian, well anterior to ventral sucker.
Ovary oval, entire, 349–429 × 220–323 (400 × 271); 628–894 (764) (9.59–10.8 (9.91)% of body-length) pre-testicular, separated from anterior testis by bulk of uterus, 56–136 (89) (0.73–1.58 (1.16)% of bodylength) from ventral sucker. Seminal receptacle oval, postero-median to ovary. Laurer’s canal opens dorsally median to ovary ( Figure 5 View FIGURES 1 – 5 ). Mehlis’ gland median to ovary. Uterus intercaecal, overlaps anterior testis, narrows at level of ovary, loops dorsally to ventral sucker. Metraterm about half length of cirrus-sac, with slightly thickened wall, runs dorsally to cirrus-sac ( Figure 3 View FIGURES 1 – 5 ). Eggs tanned, operculate, extremely numerous, 75–87 × 27–33 (80 × 31). Vitellarium follicular, fields reach well into forebody, 380–688 (542) anterior to ventral sucker, and close to posterior extremity, mainly lateral, dorsal and ventral to caeca, confluent dorsal and ventral in post-testicular region. Vitelline reservoir ventral to posterior part of ovary.
Excretory pore terminal. Excretory vesicle I-shaped, passes sinistrally to posterior testis, dextrally to anterior testis, not traced beyond anterior testis, but presumably terminates somewhere dorsally to uterus.
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.