Chambriella megacephala ( Woodland, 1934 ), Philippe Vieira Alves & Alain de Chambrier & José Luis Luque & Tomáš Scholz, 2017

Philippe Vieira Alves, Alain de Chambrier, José Luis Luque & Tomáš Scholz, 2017, Untangling convoluted taxonomy of Chambriella Rego, Chubb & Pavanelli, 1999 (Cestoda: Proteocephalidae), with erection of Riggenbachiella n. g. and the description of a new species from pimelodid catfishes in the Neotropical Region, Syst Parasitol 94, pp. 367-389: 370-371

publication ID

http://doi.org/ 10.1007/s11230-017-9700-1

publication LSID

lsid:zoobank.org:pub:404EDA94-5CAC-4C59-9623-2B0D08ED1F3B

persistent identifier

http://treatment.plazi.org/id/4CF657CE-EE28-4B1F-8F0E-0CF55DB481CC

taxon LSID

lsid:zoobank.org:act:4CF657CE-EE28-4B1F-8F0E-0CF55DB481CC

treatment provided by

Plazi

scientific name

Chambriella megacephala ( Woodland, 1934 )
status

n. comb.

Chambriella megacephala ( Woodland, 1934)   n. comb.

Syns Monticellia megacephala Woodland, 1934   ;

Goezeella agostinhoi Pavanelli & Santos, 1992   ;

Chambriella agostinhoi ( Pavanelli & Santos, 1992)   ; Lenhataenia megacephala de Chambrier & Scholz, 2008  

Type-host: Sorubimichthys planiceps (Spix & Agassiz)   ( Siluriformes   : Pimelodidae   ), originally reported erroneously by Woodland (1934) as Platystomatichthys sturio (Kner)   (see de Chambrier & Scholz, 2008).

Other hosts: Zungaro jahu (Ihering)   , Zungaro zungaro (Humboldt)   and Pseudoplatystoma fasciatum (Linnaeus)   (all Siluriformes   : Pimelodidae   ).

Type-locality: River Amazon (lower reaches), 50 miles downstream of Santarém, State of Pará, Brazil   . Other localities: River Paraná (upper reaches), Porto Rico ( State of Paraná , Brazil; 22 43 0S, 53 10 0W); River Amazon, Itacoatiara (State of Amazonas, Brazil; 3 0 9 0S, 5 8 26 0W) and Iquitos (Region of Loreto, Peru; 3 47 0S, 7 3 20 0W). GoogleMaps  

Prevalence: 38% (6/16) and 50% (11/22) in Z. jahu   (syn. Paulicea luetkeni   ) from River Paraná ( Brazil) and in S. planiceps   from River Amazon ( Peru), respectively ( Pavanelli & Santos, 1991; de Chambrier et al., 2015b).

Site in host: Anterior intestine.

Material studied: (i) Goezeella agostinhoi   ex Paulicea luetkeni   (= Zungaro jahu   ): holotype (entire specimen, CHIOC 3 2.8 2 0a); 3 paratypes (entire specimens, CHIOC 3 2.8 2 0b-d); (ii) Chambriella agostinhoi   ex Z. jahu   : vouchers (2 entire specimens, 1 fragment and 1 slide with serial crosssections), River Cuiabá, Cuiabá, State of Mato Grosso (River Paraná basin, Brazil), collected by A. A. Rego on 3 1.vii. 1 9 9 3 (MHNG-PLAT 1 9 5 4 6, 2 2 4 9 7, host field nos. BR 4 0 7, BR 4 0 8); ex Z. zungaro   : vouchers (4 entire specimens and 3 fragments mixed with Riggenbachiella amazonense   ), River Amazon, Itacoatiara, State of Amazonas (Brazil), collected by A. A. Rego and A. de Chambrier on 8.x. 1 9 9 5, and 1 entire specimen from River Amazon, Iquitos (Peru) collected by T. Scholz and R. Kuchta on 1 6.ix. 2 0 0 6 (MHNG- PLAT 2 7 9 9 0, CHIOC 3 8 4 8 4, host field Nos. BR 6 3 4, PI 4 4 5a); (iii) Lenhataenia megacephala   ex Sorubimichthys planiceps   : vouchers (2 entire specimens, 1 mixed with R. amazonense   ), River Amazon, Itacoatiara, State of Amazonas (Brazil), collected by A. A. Rego and A. de Chambrier on 2.x. 1 9 9 5 (MHNG-PLAT 2 0 7 6 8, host field No. BR 4 6 7); (iv) Chambriella   sp. ex Pseudoplatystoma fasciatum   : vouchers (2 entire specimens and fragments), River Amazon, Iquitos, Region of Loreto (Peru) collected by T. Scholz and R. Kuchta on 5.ix. 2 0 0 6 (MHNG-PLAT 6 0 0 2 6, host field no. PI 3 0 4a).

Representative DNA sequences: Seven isolates of ‘ L. megacephala   ’ from S. planiceps   in the River Amazon had identical sequences of 1,4 9 1 bp long of the lsr DNA (D1-D3 domains) (GenBank KY2 0 7 4 4 9). Two isolates of ‘ C. agostinhoi   ’, one from Z. jahu   (type-host) in the River Paraná and one from Z. zungaro   in the River Amazon, also had identical sequences with those of the seven isolates of ‘ L. megacephala   ’ (GenBank KY2 0 7 4 4 7, KY2 0 7 4 4 8).

Remarks

Comparison of voucher specimens of Lenhataenia megacephala   ex S. planiceps   with those of Goezeella agostinhoi   ex Z. jahu   (type and newly collected material; Figs. 2A –D, G View Fig. 2 , 3 View Fig. 3 ) revealed that these two taxa are indistinguishable from each other in their morphology, except for the position of the vagina in relation to the cirrus-sac (either anterior or posterior; see Table 2). This feature has been broadly used to distinguish congeneric species (Gil de Pertierra, 2003; Arredondo & Gil de Pertierra, 2010; Gil de Pertierra & de Chambrier, 2013), but its taxonomic value seems to be questionable for the above-mentioned species because their conspecificity has also been confirmed by molecular data (sequences of both taxa are identical, Fig. 1 View Fig. 1 ). Since no but one morphological differences were found among the studied specimens, the description of de Chambrier & Scholz (2008) is not repeated herein.

These results thus show that C. megacephala   , which possesses both an anterior and a posterior vagina in relation to the cirrus-sac, is widely distributed in South America, with records from the Amazon and Paraná River basins. It occurs in species of as many as three genera of big pimelodid catfishes ( Pseudoplatystoma Bleeker   , Sorubimichthys Bleeker   and Zungaro Bleeker   ), which is unusual among Neotropical proteocephalids ( Rego et al., 1999; de Chambrier et al., 2015b).

DNA

Department of Natural Resources, Environment, The Arts and Sport

Kingdom

Animalia

Phylum

Platyhelminthes

Class

Cestoda

Order

Proteocephalidea

Family

Proteocephalidae

Genus

Chambriella

Loc

Chambriella megacephala ( Woodland, 1934 )

Philippe Vieira Alves, Alain de Chambrier, José Luis Luque & Tomáš Scholz 2017
2017
Loc

Lenhataenia megacephala

de Chambrier & Scholz 2008
2008
Loc

Goezeella agostinhoi

Pavanelli & Santos 1992
1992
Loc

Chambriella agostinhoi (

Pavanelli & Santos 1992
1992
Loc

Monticellia megacephala

Woodland 1934
1934