A New Species of Rhamnocercinae

Seamster, Aaron; Monaco, Lawrence H.

doi:10.2307/2422331

Cited by 6 publications

(12 citation statements)

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“…In the present paper, Rhamnocercus stichospinus Seamster and Monaco, 1956 is redescribed and illustrated. This species is recorded for the first time from the coastal zone of the South America Atlantic Ocean.…”

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confidence: 99%

Redescription of Rhamnocercus stichospinus Seamster and Monaco, 1956 (Monogenea: Diplectanidae), parasitic on Menticirrhus americanus (Osteichthyes: Sciaenidae) from the Coastal Zone of the state of Rio de Janeiro, Brazil

Chaves

Luque

Cezar

1999

Mem. Inst. Oswaldo Cruz

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confidence: 99%

Redescription of Rhamnocercus stichospinus Seamster and Monaco, 1956 (Monogenea: Diplectanidae), parasitic on Menticirrhus americanus (Osteichthyes: Sciaenidae) from the Coastal Zone of the state of Rio de Janeiro, Brazil

Chaves

Luque

Cezar

1999

Mem. Inst. Oswaldo Cruz

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“…Hargis (1955) and Seamster and Monaco (1956) discussed the validity of Rhamnocercinae based on the origin of the echinodiscs and squamodiscs (see comment above). Bychowsky (1957) suggested that Rhamnocercinae and species of Lepidotrema are closely related due to the presence of spines in the peduncle and haptor, and considered squamodiscs to be homologous with these spines.…”

Section: Taxonomic Revisionmentioning

confidence: 99%

“…The presence of a sclerotized vagina, reported by Luque and Iannacone (1991), could not be confirmed due to the poor condition of the available specimen. Monaco, 1956) comb. n.…”

Section: Rhamnocercoides Menticirrhimentioning

confidence: 99%

“…6-15 Synonymy: Rhamnocercus stichospinus Seamster et Monaco, 1956 Redescription. Based on voucher specimens from CHMZUSP and IPCR.…”

Section: Rhamnocercoides Stichospinus (Seamster Etmentioning

confidence: 99%

“…Hargis (1955) rejected the Rhamnocercinae based on the proposed homology of the dorsal and ventral "plates" (parenchymatic spines, sensu Monaco et al 1954) of rhamnocercines and the squamodiscs of other diplectanids. Seamster and Monaco (1956) rejected the proposal of Hargis (1955) and continued to recognise the Rhamnocercinae as valid. Oliver (1987) proposed elevation of the Rhamnocercinae to the family level within the Heterotesioidea based on the confluent condition of the gut.…”

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Revision and phylogeny of Rhamnocercinae Monaco, Wood et Mizelle, 1954 (Monogenoidea: Diplectanidae)

Domingues¹,

Boeger²

2006

FOLIA PARASIT

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Abstract. Species of Rhamnocercinae Monaco, Wood et Mizelle, 1954 are gill parasites of sciaenid fishes (Perciformes). Seven are marine species (three in the western Atlantic and four in oriental Pacific) and one is a neotropical freshwater species (Rio Doce Basin, Brazil). While the status of the subfamily may be questioned, this assemblage of species is apparently supported by several shared apomorphic and plesiomorphic characters, such as: (1) peduncular spines with anterior and posterior roots; (2) haptor laterally expanded, armed with anchors (two pairs); bars (one ventral, two dorsal); 14 hooks and haptoral accessory spines; and (3) Monaco et al. (1954) proposed the Rhamnocercinae to accommodate diplectanid species with the following characteristics: (1) absence of squamodiscs and (2) presence of parenchymatic spines in the haptor and peduncle. Hargis (1955) rejected the Rhamnocercinae based on the proposed homology of the dorsal and ventral "plates" (parenchymatic spines, sensu Monaco et al. 1954) of rhamnocercines and the squamodiscs of other diplectanids. Seamster and Monaco (1956) rejected the proposal of Hargis (1955) and continued to recognise the Rhamnocercinae as valid. Oliver (1987) proposed elevation of the Rhamnocercinae to the family level within the Heterotesioidea based on the confluent condition of the gut. Chaves et al. (1999) rejected this change in category but considered that species of this taxon possess confluent intestinal caeca as suggested by Hargis (1955), Luque andIannacone (1991) andOliver (1987). Chaves et al. (1999) recommended that a possible change in category would only be justifiable if based on a phylogenetic analysis of the Diplectanidae. Desdevises et al. (2001) accepted Oliver's decision (1987 and proposed a phylogenetic hypothesis for genera of Diplectanidae. Obviously, species of Rhamnocercoides and Rhamnocercus were not considered in their phylogenetic analysis.While the taxonomic status of this group of species remains uncertain, its eight species depict a unique character that may represent a synapomorphy, supporting its natural condition. Its species are gill parasites of sciaenids (Perciformes, Sciaenidae) and share the presence of peduncular spines with deep and superficial roots. Thus, in this paper, the species included in Rhamnocercinae are revised based on a phylogenetic hypothesis.

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Neotropical Monogenoidea. 49. Four new species of the Diplectanidae (Dactylogyrinea) from the gills of some pachyurines (Teleostei: Sciaenidae) from the Rio Tocantins and Rio Doce Basins, with the proposal of Anoplectanum n. g. and Spinomatrix n. g.

2006

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Four new species of the Diplectanidae from the gills of freshwater sciaenid species (Pachyurinae) in Brazil are described and two new genera, Anoplectanum n. g. and Spinomatrix n. g., are proposed. These are: Diplectanum copiosum n. sp. from Pachyurus junki and Petilipinnis grunniens; Anoplectanum haptorodynatum n. g., n. sp. from Pachyurus junki and Petilipinnis grunniens, and A. microsoma n. g., n. sp. from Petilipinnis grunniens, all in the Tocantins Basin; and Spinomatrix penteormos n. g., n. sp. from Pachyurus adspersus in the Rio Doce Basin. Anoplectanum is proposed to accommodate diplectanids lacking squamodiscs and having a superficial root of the ventral anchor as long or longer than the deep root. Spinomatrix is proposed for species having a haptoral and peduncular armature composed of spines, hooks, anchors, squamodiscs and armed muscular pads.

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A New Species of Rhamnocercinae

Cited by 6 publications

References 4 publications

Redescription of Rhamnocercus stichospinus Seamster and Monaco, 1956 (Monogenea: Diplectanidae), parasitic on Menticirrhus americanus (Osteichthyes: Sciaenidae) from the Coastal Zone of the state of Rio de Janeiro, Brazil

Redescription of Rhamnocercus stichospinus Seamster and Monaco, 1956 (Monogenea: Diplectanidae), parasitic on Menticirrhus americanus (Osteichthyes: Sciaenidae) from the Coastal Zone of the state of Rio de Janeiro, Brazil

Revision and phylogeny of Rhamnocercinae Monaco, Wood et Mizelle, 1954 (Monogenoidea: Diplectanidae)

Neotropical Monogenoidea. 49. Four new species of the Diplectanidae (Dactylogyrinea) from the gills of some pachyurines (Teleostei: Sciaenidae) from the Rio Tocantins and Rio Doce Basins, with the proposal of Anoplectanum n. g. and Spinomatrix n. g.

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