Chambriella megacephala ( Woodland, 1934 )

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 pimelo, Syst Parasitol 94, pp. 367-389: 370-371

publication ID

10.1007/s11230-017-9700-1

persistent identifier

http://treatment.plazi.org/id/03DF87B3-D44D-5039-C1EE-0B1DC335F929

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 DNAAbout 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 DNAAbout 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, GView Fig. 2, 3View 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. 1View 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