Chauhanellus boegeri Domingues & Fehlauer, 2006, n. sp.
Creators: name: Domingues, Marcus V.
name: Fehlauer, Karin H.
Publisher: name: Zenodo
Year: 2006
Subjects: Biodiversity
Taxonomy
Animalia
Platyhelminthes
Monogenea
Dactylogyridea
Dactylogyridae
Chauhanellus
Chauhanellus boegeri

description: Chauhanellus boegeri n. sp.
(Figs 8–14)
Type-host: Genidens barbus (Lacepède, 1803).
Site: Gills.
Type-locality: Baía de Guaratuba, Municipality of Guaratuba, State of Paraná, Brazil (01–XII–1998).
Other records: Genidens genidens (Cuvier, 1829), Baía de Guaratuba, Municipality of Guaratuba, State of Paraná, Brazil (05–I–1994).
Specimens deposited: Holotype, MZUSP 6354; 19 paratypes, CHIOC 36821 a–e, MZUSP 6355 a–k, USNPC 98919; 8 vouchers, CHIOC 36822 a–b, MZUSP 6356 a–d; USNPC 98920.
Etymology: The specific name is in honor of Dr. Walter A. Boeger, Universidade Federal do Paraná, Brazil, in recognition of his valuable work on the Neotropical Monogenoidea.
Comparative measurements: Table 1.
Description: (Based on 20 adult specimens) Body 1028 (940–1100; n=5) long, fusiform; greatest width 143 (125–163; n=8) usually at level of germarium. Tegument smooth. Cephalic lobes moderately developed; three pairs of head organs; cephalic glands unicellular, posterolateral to pharynx. Eyes 4; posterior pair closer than anterior pair; accessory granules absent or few in cephalic area. Mouth subterminal, midventral; pharynx spherical to subovate, 57 (48–65; n=7) in diameter; esophagus short; intestinal ceca two, nonconfluent, lacking diverticula. Haptor subspherical to hexagonal, 202 (173–234; n=4) long, 133 (144–168; n=4) wide. Anchors dissimilar; ventral anchor 71 (61–75; n=4) long, base 61 (59–64; n=4) wide, robust, with truncate superficial root, deep root expanded into wings, recurved shaft, short slightly recurved point. Dorsal anchor 85 (82–87; n= 4) long, base 35 (32–40; n=3) wide, robust, with inconspicuous superficial root, expanded deep root, evenly curved shaft and point; anchor spine blunt. Ventral bar 30 (28–31; n=3) long, 154 (139–166; n=3) wide, with protuberances at each end for articulation with ventral anchor; posterior protuberances foot-like. Dorsal bar 28 (25–33; n=3) long, 112 (103–120; n=2) wide, V-shaped, with spines on both ends, elongate posteromedial process bent ventrally. Hooks similar; each 16 (14–18; n=20) long, with depressed thumb, evenly curved, shaft, delicate point, shank without inflation, filamentous hook loop (FH loop) about half of shank length. Male copulatory organ sclerotised, a coiled tube of about 1 ¼ counterclockwise rings, 67 (61–75; n=15) long, base with sclerotised margin, flattened end; proximal ring diameter 22 (19–26; n=15). Accessory Genidens barbus N Genidens genidens N
Body
piece a variable sheath. Testis 206 (163–300; n=8) long, 82 (72–101; n=9) wide, pyriform; seminal vesicle sigmoid; prostatic reservoir ovate. Germarium 83 (72–96; n=8) long, 60 (50–72; n=8) wide, subspherical. Ootype not observed. Vaginal aperture dextral, vagina muscular. Seminal receptacle transversely ovate. Vitellaria coextensive with caeca. Eggs not observed.
Remarks: Chauhanellus boegeri n. sp. resembles C. neotropicalis based on the general morphology of haptoral structures. However, C. boegeri can be distinguished from C. neotropicalis by the morphology of the male copulatory organ. The distal tip of the male copulatory organ is flattened in C. boegeri and acute in the C. neotropicalis. Further, the morphology of the germarium (ovate in C. boegeri, pyriform in C. neotropicalis) and the seminal receptacle (transversely pyriform in C. boegeri, sigmoid in C. neotropicalis) can be used to distinguish both species.
description: Published as part of Domingues, Marcus V. & Fehlauer, Karin H., 2006, New species of Chauhanellus (Monogenoidea, Platyhelminthes) from the gills of Southern Atlantic marine catfishes (Siluriformes, Ariidae) of the Neotropical region, pp. 61-68 in Zootaxa 1365 on pages 65-68, DOI: 10.5281/zenodo.174788