Dichelyne robustus (Van Cleave & Mueller, 1932) Mueller, 1933

Arai, Hisao P. & Smith, John W., 2016, Guide to the Parasites of Fishes of Canada Part V: Nematoda, Zootaxa 4185 (1), pp. 1-274 : 165-166

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.5626986

persistent identifier

https://treatment.plazi.org/id/038FB248-FF15-FF13-89B9-C71723EC9CBC

treatment provided by

Plazi

scientific name

Dichelyne robustus (Van Cleave & Mueller, 1932) Mueller, 1933
status

 

Dichelyne robustus (Van Cleave & Mueller, 1932) Mueller, 1933

Synonym: Dacnitoides robusta Van Cleave & Mueller, 1932

Description (after Van Cleave & Mueller 1932). With characteristics of the genus. Body robust, with conspicuous cuticular thickening from oral region to beyond limit of oesophagus. Prominent pair of amphids or cephalic papillae near posterior limit of oesophagus. Oesophagus 0.38–0.43 long. Ventral intestinal caecum extends anteriorly almost to buccal cavity ( Fig. 95 View FIGURE 95 A).

Males: 4.25–4.50 long; width about 0.32. Pre-cloacal sucker absent. Four pairs of pre-cloacal and four pairs of post-cloacal papillae. One median and three pairs of lateral papillae just anterior to cloaca ( Fig. 95 View FIGURE 95 B). Spicules relatively short; when withdrawn they appear tubular but when extruded are broad, ribbon-like, with frilled tips. Gubernaculum apparently absent.

Females: about 5.0 long; width 0.47–0.51. Ovarian coils extend almost to anterior end of body ( Fig. 93 View FIGURE 93 A). Vulva short distance behind mid-body. Anus about 0.15 from tail tip. Pair minute lateral papillae in middle of postcloacal region. Tail bears spine with “the structure of a sensory papilla” ( Fig. 95 View FIGURE 95 C).

Comments: the original description of D. robustus is inadequate and, according to Caspeta-Mandujano et al. (1999), type specimens are not available in the US National Parasite Collection, Beltsville, Maryland—collections that have been transferred to the Smithsonian Institution, National Museum of Natural History (Washington, DC, USA). It seems that Maggenti (1971) was not first to transfer Dacnitoides robusta to Dichelyne as “ Dichelyne robusta ” [= Dichelyne robustus ]. The n.comb. appears to have been first proposed by Mueller (1933). Site : intestinal lumen

Hosts: Ameiurus melas (2); Ameiurus nebulosus (1)

Distribution: Manitoba, Ontario

Records: 1. Bangham 1955 (ON); 2. Choudhury & Nadler 2016 (MB)

Kingdom

Animalia

Phylum

Nematoda

Class

Secernentea

Order

Spirurida

Family

Cucullanidae

Genus

Dichelyne

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