Chambriella Rego, Chubb &amp; Pavanelli 1999
Creators: name: Alves, Philippe Vieira
name: De Chambrier, Alain
name: Luque, José Luis
name: Tomáš Scholz
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Platyhelminthes
Cestoda
Proteocephalidea
Proteocephalidae
Chambriella

description: <i>Chambriella</i> Rego, Chubb &amp; Pavanelli, 1999 Syns <i>Lenhataenia</i> de Chambrier &amp; Scholz, 2008; <i>Robertiella</i> Rego, 1999 (<i>nomen nudum</i>) <i>Amended diagnosis</i> Proteocephalidae, Monticelliinae. Small-sized worms. Testes, ovary, vitelline follicles and uterus cortical. Strobila acraspedote, with proglottides variable in shape and size. Scolex quadrilobed, almost rectangular in apical view, with rounded to slightly conical apex; metascolex absent. Suckers large, bi-loculate, pear-shaped, with free posterior margin overlapping narrow proliferation zone, well delimited from scolex. Proliferation zone (neck) present. Internal longitudinal musculature formed by small bundles of muscle fibres, variable in number. Testes in one field. Cirrus-sac subovate, thick-walled; internal sperm duct thickwalled, strongly coiled in proximal half of cirrus-sac. Genital pores pre-equatorial, irregularly alternating. Genital atrium present. Ovary bi-lobed, slightly follicular. Vagina anterior and/or posterior to cirrussac, surrounded by ring-like vaginal sphincter. Vitelline follicles form two lateral bands, reaching to anterior margin of proglottides also on poral side, i.e. preporally. Uterine development type 2 according to de Chambrier et al. (2004). Parasites of pimelodid catfishes (Siluriformes: Pimelodidae) in the Neotropical Region. <i>Type- and only known species</i>: <i>Chambriella agostinhoi</i> (Pavanelli &amp; Santos, 1992) [syn. of <i>Chambriella megacephala</i> (Woodland, 193 4) n. comb.] Remarks The taxonomic history of <i>Chambriella</i> has been convoluted and two of the present authors (AC and TS) also contributed to the confusion by providing an incorrect diagnosis of this poorly described genus. The key problem was that they could not examine typespecimens of both species of <i>Chambriella</i> at the time and that the original descriptions of both species and the original generic diagnosis were not detailed enough to recognise the actual morphology of the cirrus-sac. However, recent evaluation of the type-material of <i>Chambriella agostinhoi</i> (type-species) and <i>C. paranaensis</i> deposited in CHIOC revealed that these species differ markedly in the structure of the cirrussac. In <i>C. agostinhoi</i>, the cirrus-sac is relatively large and wide, subovate and contains a convoluted, thickwalled internal sperm duct (vas deferens) and a cirrus with a simple ejaculatory duct, i.e. identical with that of <i>L</i>. <i>megacephala</i>, type- and only species of <i>Lenhataenia</i>, which was redescribed by de Chambrier &amp; Scholz (2008; see their figure 42). This re-examination also revealed that <i>C</i>. <i>agostinhoi</i> and <i>L</i>. <i>megacephala</i> are indistinguishable from each other in all morphological characteristics, even though they occur in different fish hosts (but of the same family, the Pimelodidae). Conversely, the cirrus-sac of <i>C</i>. <i>paranaensis</i> is sigmoid, composed of three parts: a large, chambered internal seminal vesicle, a middle muscular part with a sinuous ejaculatory duct followed by a straight, short cirrus with an inverted T-shaped ejaculatory duct in its proximal part, i.e. markedly different from that of <i>C</i>. <i>agostinhoi</i> and <i>L</i>. <i>megacephala</i>. These findings lead us to synonymise <i>Lenhataenia</i> with <i>Chambriella</i>, but the type-species of the latter genus, <i>Chambriella agostinhoi</i>, becomes a junior synonym of <i>Chambriella megacephala</i> n. comb., and to transfer <i>C</i>. <i>paranaensis</i> to <i>Riggenbachiella</i> n. g. as <i>Riggenbachiella paranaense</i> n. comb. Rego (1999) transferred both nominal species of <i>Chambriella</i>, i.e. the genus that he and two co-authors erected in the same year (Rego et al., 1999), to an allegedly new, but never formally defined genus, <i>Robertiella</i>, as ‘‘ <i>Robertiella agostinhoi</i> n. comb. ’’ and ‘‘ <i>R</i>. <i>paranaensis</i> n. comb. ’’. Therefore, <i>Robertiella</i> is considered a <i>nomen nudum</i> in accordance with the International Code of Zoological Nomenclature (ICZN, 1999).
description: Published as part of <i>Philippe Vieira Alves, Alain de Chambrier, José Luis Luque &amp; Tomáš Scholz, 2017, Untangling convoluted taxonomy of Chambriella Rego, Chubb &amp; Pavanelli, 1999 (Cestoda: Proteocephalidae), with erection of Riggenbachiella n. g. and the description of a new species from pimelodid catfishes in the Neotropical Region, pp. 367-389 in Syst Parasitol 94</i> on page 370, DOI: 10.1007/s11230-017-9700-1, http://zenodo.org/record/925123
description: {"references": ["Rego, A. A., Chubb, J. C., &amp; Pavanelli, G. C. (1999). Cestodes in South American freshwater teleost fishes: keys to genera and brief description of species. Revista Brasileira de Zoologia, 16, 299 - 367.", "de Chambrier, A., &amp; Scholz, T. (2008). Tapeworms (Cestoda: Proteocephalidea) of firewood catfish Sorubimichthys planiceps (Siluriformes: Pimelodidae) from the Amazon River. Folia Parasitologica, 55, 17 - 28.", "Rego, A. A. (1999). Scolex morphology of proteocephalid cestodes parasites of Neotropical freshwater fishes. Memorias do Instituto Oswaldo Cruz, 94, 37 - 52.", "de Chambrier, A., Zehnder, M. P., Vaucher, C., &amp; Mariaux, J. (2004). The evolution of the Proteocephalidea (Platyhelminthes, Eucestoda) based on an enlarged molecular phylogeny, with comments on their uterine development. Systematic Parasitolology, 57, 159 - 171.", "Pavanelli, G. C., &amp; Santos, M. H. M. (1992). Goezeella agostinhoi sp. n. e Monticellia loyolai sp. n. cestoides proteocefalideos parasitas de peixes pimelodideos do Rio Parana, Parana. Brasil. Revista Brasileira de Parasitologia Veterinaria, 1, 45 - 50.", "ICZN (1999). International Code of Zoological Nomenclature, Fourth Edition. International Trust for Zoological Nomenclature, c / o The Natural History Museum, London, 306 pp."]}