Taxonomic revision of the genus Neoheligmonella Durette-Desset, 1971 (Nematoda, Heligmonellidae) parasitic in Muridae mainly from the Ethiopian Region

The genus Neoheligmonella Durette-Desset, 1971 (Nippostrongylinae) is revised and split into three genera, one of them with two subgenera. The new genera can be discriminated mainly by characters of the synlophe which had been not considered previously at the supraspecific level. These characters include the presence of a careen, the size of the right ridge relative to the left ridge, and the presence of gradients in the ridge size. The genus Neoheligmonella sensu stricto is proposed to include species with a careen, and it is divided into two subgenera: Neoheligmonella (Neoheligmonella) characterized by a right ridge measuring more than 45% of the ventral ridge of the careen, and Neoheligmonella (Duplantierus) n. subgen. with a right ridge measuring less than 45% of the ventral ridge of the careen. Dioufnema n. gen. includes one species with neither a careen nor hypertrophied ridges and having a bursa of type 1-3-1. Taranchonema n. gen. includes species without a careen, with the left ridge and the right ridge hypertrophied, and without a dorsal gradient in ridge size. A dichotomous key to the new genera and subgenera is provided. Five species of unknown synlophe, originally placed in the former genus Neoheligmonella and validated by other characters, are considered as Nippostrongylinae incertae sedis.Révision taxonomique du genre Neoheligmonella Durette-Desset, 1971 (Nematoda, Heligmonellidae) parasite de Muridae principalement de la Région éthiopienne. Le genre Neoheligmonella Durette-Desset, 1971 (Nippostrongylinae) est révisé et scindé en trois genres, dont un avec deux sous-genres. Les nouveaux genres peuvent être principalement différenciés par des caractères du synlophe qui n'avaient pas été considérés jusqu'à présent au niveau supra-spécifique. Ces caractères incluent la présence d'une carène, la taille relative de la crête droite par rapport à la crête gauche, et la présence de gradients de la taille des crêtes. Le genre Neoheligmonella sensu stricto est proposé pour inclure des espèces possédant une carène et il se divise en deux sous-genres: Neoheligmonella (Neoheligmonella) caractérisé par une crête droite mesurant plus du 45 % de la crête ventrale de la carène et Neoheligmonella (Duplantierus) n. subgen. avec une crête droite mesurant moins du 45 % de la crête ventrale de la carène. Dioufnema n. gen. inclut une espèce sans carène ni crêtes hypertrophiées et possédant une bourse caudale du type 1-3-1. Taranchonema n. gen. inclut des espèces sans carène, avec la crête gauche et la crête droite hypertrophiées et sans gradient dorsal des crêtes. Une clé dichotomique des nouveaux genres et sous-genres est fournie. Cinq espèces dont le synlophe est inconnu, placées jusqu'à présent dans le précédent genre Neoheligmonella et validées par d'autres caractères, sont considérées comme des Nippostrongylinae incertae sedis.Fil: Digiani, Maria Celina. Universidad Nacional de la Plata. Facultad de Ciencias Naturales y Museo. División Zoologia Invertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Durette Desset, Marie Claude. Muséum National d’Histoire Naturelle; Franci

Revision of the genera of Heligmonellidae (Nematoda, Heligmosomoidea), parasitic in Muridae from New Guinea

Up to now, 24 genera of Nematoda belonging to the Nippostrongylinae (Heligmonellidae) have been reported from New Guinean murid rodents. Nine of these genera have been reviewed in previous works. In the present work, another 11 genera are re-examined on morphological characters mainly corresponding to the synlophe and to a lesser degree to the bursa. This re-examination leads us to recognize three valid genera: Melomystrongylus, Pogonomystrongylus and Nugininema. The remaining genera appear to us insufficiently described or seem to involve more than one taxon; we consider them genera inquirenda. These are: Mawsonema, Montistrongylus, Parvinema, Missimstrongylus, Flannerystrongylus, Helgenema and Paramelomystrongylus. The genus Rodentanema does not belong to the Nippostrongylinae but to the Herpetostrongylidae (Heligmosomoidea). In addition to the three genera recognized herein, nine other genera of Nippostrongylinae are present in New Guinea: Equilophos, Hasanuddinia, Hasegawanema, Hughjonestrongylus, Lesleyella, Macrostrongylus, Nippostrongylus, Parasabanema and Sanduanensis. Several species attributed to the genera Bunomystrongylus, Chisholmia, Odilia and Sabanema are insufficiently described and their generic assignment could not be rectified or ratified. Consequently, the presence of these latter genera in New Guinean rodents remains unconfirmed, until more complete descriptions or illustrations are provided.Fil: Durette Desset, Marie Claude. Muséum National d'Histoire Naturelle; Francia. Centre National de la Recherche Scientifique; FranciaFil: Digiani, Maria Celina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Zoología Invertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentin

Révision taxonomique des Nippostrongylinae (Nematoda, Heligmonellidae) parasites de Muridae de la région australasienne. Le genre Odilia Durette-Desset, 1973

The species of the genus Odilia Durette-Desset, 1973 (Heligmonellidae, Nippostrongylinae) are re-distributed among eight genera of which five are new. This classification is mainly based on certain characters of the synlophe not previously taken into account at the supraspecific level. These characters mainly include the presence or absence of a careen, the relative size of the ridges forming the careen, the development and position of ridge 1', the development of the left ridge and right ridge, and the distribution of the largest ridges. Eighteen of the 20 known species are rearranged in the following genera: Odilia sensu stricto Durette-Desset, 1973 with Odilia mackerrasae (Mawson, 1961) as type species, Chisholmia n. gen. with Chisholmia bainae (Beveridge & Durette-Desset, 1992) n. comb. as type species, Equilophos n. gen. with Equilophos polyrhabdote (Mawson, 1961) n. comb. as type species, Hasegawanema n. gen. with Hasegawanema mamasaense (Hasegawa, Miyata & Syafruddin, 1999) n. comb. as type species, Hughjonestrongylus Digiani & Durette-Desset, 2014 with Hughjonestrongylus ennisae (Smales & Heinrich, 2010) as type species, Lesleyella n. gen. with Lesleyella wauensis (Smales, 2010) n. comb. as type and sole species, Parasabanema szalayi Smales & Heinrich, 2010, and Sanduanensis n. gen. with Sanduanensis dividua (Smales, 2010) as type and sole species. Odilia uromyos Mawson, 1961 and Odilia carinatae Smales, 2008 are not included in the new classification. A key to the proposed genera is provided. The new generic arrangement follows a distribution more related to the biogeographical areas than to the host groups.Les espèces du genre Odilia Durette-Desset, 1973 (Heligmonellidae, Nippostrongylinae) sont réparties en huit genres, dont cinq nouveaux. Cette classification s’appuie principalement sur certains caractères du synlophe non pris en compte jusqu’à présent au niveau supraspécifique. Ces caractères incluent principalement la présence ou l’absence d’une carène, la taille relative des crêtes formant la carène, le développement et la position de la crête 1’, le développement de la crête gauche et de la crête droite, et la répartition des crêtes les plus larges. Dix-huit espèces sur les 20 actuellement connues sont classées dans les genres suivants: Odilia sensu stricto Durette-Desset, 1973 avec Odilia mackerrasae (Mawson, 1961) comme espèce type, Chisholmia n. gen. avec Chisholmia bainae (Beveridge & Durette-Desset, 1992) n. comb. comme espèce type, Equilophos n. gen. avec Equilophos polyrhabdote (Mawson, 1961) n. comb. comme espèce type, Hasegawanema n. gen. avec Hasegawanema mamasaense (Hasegawa, Miyata & Syafruddin, 1999) n. comb. comme espèce type, Hughjonestrongylus Digiani & Durette-Desset, 2014 avec Hughjonestrongylus ennisae (Smales & Heinrich, 2010) comme espèce type, Lesleyella n. gen. avec Lesleyella wauensis (Smales, 2010) n. comb. comme espèce type et unique espèce, Parasabanema szalayi Smales & Heinrich, 2010 et Sanduanensis n. gen. avec Sanduanensis dividua (Smales, 2010) comme espèce type et unique espèce. Odilia uromyos Mawson, 1961 et Odilia carinatae Smales, 2008 ne sont pas incluses dans la nouvelle classification. Une clé dichotomique des genres proposés est fournie. Le nouvel arrangement générique suit une répartition plus liée aux aires biogéographiques qu’aux groupes d’hôtes.Facultad de Ciencias Naturales y Muse

Taxonomic revision of the type specimens of Ethiopian Nippostrongylinae (Nematoda) deposited at the Natural History Museum of London

We studied the original material of several species of Nippostrongylinae (Nematoda: Heligmonellidae) described by H. A. Baylis in muroid rodents from Nigeria: Heligmonina praomyos Baylis, 1928, Heligmonina oenomyos Baylis, 1928, Heligmonina cricetomyos  Baylis, 1928, Neoheligmonella affinis (Baylis, 1928), Neoheligmonella intermedia (Baylis, 1928), Neoheligmonella gracilis (Baylis, 1928),  Neoheligmonella impudica (Baylis, 1928), Neoheligmonella moennigi (Baylis, 1928), and Heligmonoides murina Baylis, 1928. The comparison of the material examined to the original descriptions, revealed the presence of at least seven other species mixed among the type and voucher material. For the nominal species of Baylis lectotypes and paralectotypes are designated. Due to the poor condition of the material, the other species found were only identifiable to generic level. Most of them were coparasitic with Baylis’ species. The following species associations were found: Heligmonina praomyos + Neoheligmonella moennigi, Heligmonina oenomyos + Neoheligmonella sp. 1, Heligmonina cricetomyos + Neoheligmonella moennigi, Heligmonina sp. 2 + Neoheligmonella sp. 4. Tables with the identification of the specimens studied are provided. New morphometrical data and illustrations on this material are also provided, particularly on the anterior part of the body and genital apparatus in the females. The occurrence of coparasitism as a frequent phenomenon among the Trichostrongylina is highlighted.Fil: Durette Desset, Marie Claude,. Centre National de la Recherche Scientifique; FranciaFil: Digiani, Maria Celina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Zoología Invertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentin

Révision taxonomique des Nippostrongylinae (Nematoda, Heligmonellidae) parasites de Muridae de la région australasienne. Le genre Odilia Durette-Desset, 1973

The species of the genus Odilia Durette-Desset, 1973 (Heligmonellidae, Nippostrongylinae) are re-distributed among eight genera of which five are new. This classification is mainly based on certain characters of the synlophe not previously taken into account at the supraspecific level. These characters mainly include the presence or absence of a careen, the relative size of the ridges forming the careen, the development and position of ridge 1', the development of the left ridge and right ridge, and the distribution of the largest ridges. Eighteen of the 20 known species are rearranged in the following genera: Odilia sensu stricto Durette-Desset, 1973 with Odilia mackerrasae (Mawson, 1961) as type species, Chisholmia n. gen. with Chisholmia bainae (Beveridge & Durette-Desset, 1992) n. comb. as type species, Equilophos n. gen. with Equilophos polyrhabdote (Mawson, 1961) n. comb. as type species, Hasegawanema n. gen. with Hasegawanema mamasaense (Hasegawa, Miyata & Syafruddin, 1999) n. comb. as type species, Hughjonestrongylus Digiani & Durette-Desset, 2014 with Hughjonestrongylus ennisae (Smales & Heinrich, 2010) as type species, Lesleyella n. gen. with Lesleyella wauensis (Smales, 2010) n. comb. as type and sole species, Parasabanema szalayi Smales & Heinrich, 2010, and Sanduanensis n. gen. with Sanduanensis dividua (Smales, 2010) as type and sole species. Odilia uromyos Mawson, 1961 and Odilia carinatae Smales, 2008 are not included in the new classification. A key to the proposed genera is provided. The new generic arrangement follows a distribution more related to the biogeographical areas than to the host groups.Les espèces du genre Odilia Durette-Desset, 1973 (Heligmonellidae, Nippostrongylinae) sont réparties en huit genres, dont cinq nouveaux. Cette classification s’appuie principalement sur certains caractères du synlophe non pris en compte jusqu’à présent au niveau supraspécifique. Ces caractères incluent principalement la présence ou l’absence d’une carène, la taille relative des crêtes formant la carène, le développement et la position de la crête 1’, le développement de la crête gauche et de la crête droite, et la répartition des crêtes les plus larges. Dix-huit espèces sur les 20 actuellement connues sont classées dans les genres suivants: Odilia sensu stricto Durette-Desset, 1973 avec Odilia mackerrasae (Mawson, 1961) comme espèce type, Chisholmia n. gen. avec Chisholmia bainae (Beveridge & Durette-Desset, 1992) n. comb. comme espèce type, Equilophos n. gen. avec Equilophos polyrhabdote (Mawson, 1961) n. comb. comme espèce type, Hasegawanema n. gen. avec Hasegawanema mamasaense (Hasegawa, Miyata & Syafruddin, 1999) n. comb. comme espèce type, Hughjonestrongylus Digiani & Durette-Desset, 2014 avec Hughjonestrongylus ennisae (Smales & Heinrich, 2010) comme espèce type, Lesleyella n. gen. avec Lesleyella wauensis (Smales, 2010) n. comb. comme espèce type et unique espèce, Parasabanema szalayi Smales & Heinrich, 2010 et Sanduanensis n. gen. avec Sanduanensis dividua (Smales, 2010) comme espèce type et unique espèce. Odilia uromyos Mawson, 1961 et Odilia carinatae Smales, 2008 ne sont pas incluses dans la nouvelle classification. Une clé dichotomique des genres proposés est fournie. Le nouvel arrangement générique suit une répartition plus liée aux aires biogéographiques qu’aux groupes d’hôtes.Facultad de Ciencias Naturales y Muse

Pudicinae (Nematoda) coparasitic in Proechimys roberti (rodentia: Echimyidae) from the Brazilian amazonia: Description of a new species of Pudica, redescription of pudica evandroi (travassos) and updated key to the species of the genus

The re-examination of nematodes collected decades ago from a spiny rat, Proechimys roberti (Echimyidae) from Pará State, revealed the presence of Acanthostrongylus acanthostrongylus Travassos, 1937, and two coparasitic species of Pudica (Heligmonellidae: Pudicinae), one of them new to science. Pudica minima n. sp. mostly resembles Pudica tenua Durette-Desset, 1970, described from Proechimys semispinosus in Colombia. Nevertheless, it differs from P. tenua by having a synlophe with 12 ridges with poorly developed careen, bursal pattern of type 2-2-1 on the right lobe, bursal rays 2 and 3 similar in length, and spicules longer with spoon-shaped tips. Pudica evandroi (Travassos, 1937) was already described from Pr. roberti but its synlophe remained undescribed and the original description lacked some details. A detailed study of the synlophe is provided and the range of morphometric data for males and females is enlarged. The study of the synlophe allowed ratifying the placement of this species within Pudica, as early suggested by previous authors. The species list and identification key to species of Pudica are updated with the inclusion of three species. The status of Heligmosomum alpha Travassos, 1918, which was transferred to Pudica in 1990, is emended and the species is considered a Nippostrongylinae incertae sedis.Fil: Serrano, Paula Carolina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División de Zoología Invertebrados; ArgentinaFil: Durette Desset, Marie Claude. Muséum National d'Histoire Naturelle; FranciaFil: Digiani, Maria Celina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División de Zoología Invertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentin

A New Heligmonellid (Nematoda) from Sylvilagus floridanus (Leporidae) in Costa Rica, with Some Comments on Species of Paraheligmonella Durette-desset, 1971

Paraheligmonella kinsellai n. sp. (Nematoda: Heligmonellidae: Heligmonellinae) is described from the small intestine of a cottontail rabbit Sylvilagus floridanus  (Allen, 1890) (Leporidae) from Costa Rica. The new species is similar to P. romerolagi (Gibbons and Kumar, 1980), parasitic in Romerolagus diazi from Mexico and to P. lamothei Digiani, Carren˜o, and Durette-Desset, 2008, parasitic in Sylvilagus floridanus from Costa Rica, by the characters of the synlophe at mid-body, i.e., 14 cuticular ridges and a single axis of orientation inclined at 30 to the sagittal axis in both sexes. The males of the new species are distinguished from those of P. romerolagi by a caudal bursa that is not bell-shaped, a bursal pattern of type 2–3 with a tendency to 2–2–1, and a genital cone that is not hypertrophied. They are also distinguished from the males of P. lamothei by having the same bursal pattern in both lobes (in P. lamothei the pattern is 2–2–1 on the right lobe and 2–3, with a tendency to 2–2–1, on the left lobe), rays 3 are much longer than rays 2, rays 2 and 3 diverging more proximally, and rays 8 are longer than the dorsal ray. The females of the new species also differ from those of P. lamothei by the shape of the posterior extremity (long and strongly curved vs. short and nearly straight) and by the synlophe at the ovejector level (ridge no. 1 hypertrophied and remaining ridges reduced vs. ventral ridges hypertrophied and dorso-lateral ridges reduced).Fil: Digiani, Maria Celina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División de Zoología Invertebrados; ArgentinaFil: Carreño, Ramón A.. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División de Zoología Invertebrados; Argentina. Ohio Wesleyan University.; Estados UnidosFil: Durette Desset, Marie Claude. Muséum National d'Histoire Naturelle; Franci

Description of a new species of Heligmonina Baylis, 1928 (Nematoda: Heligmonellidae) a parasite of Mastomys Natalensis (Rodentia: Muridae) from Swaziland and new data on the synlophe of Heligmonina Chabaudi (Desset, 1966)

A new species of heligmosomoid nematode belonging to the subfamily Nippostrongylinae Durette-Desset, 1970 is described: Heligmonina wakelini n. sp., a parasite from the small intestine of the commensal rodent Mastomys natalensis (Smith, 1834) from Swaziland. It differs from the most closely related species H. boomkeri Durette-Desset & Digiani, 2005 by the number of the cuticular ridges in the female synlophe (10 vs 12), the width of the left ala, larger than the body diameter in the male, and the inclination of the axis of orientation of the ridges in both sexes (53° vs 70°). New morphological data (head and synlophe) on Heligmonina chabaudi (Desset, 1964), also a parasite of Mastomys natalensis in the Republic of Congo, are provided in order to compare with the new species.Facultad de Ciencias Naturales y Muse

Description of a new species of Heligmonina Baylis, 1928 (Nematoda: Heligmonellidae) a parasite of Mastomys Natalensis (Rodentia: Muridae) from Swaziland and new data on the synlophe of Heligmonina Chabaudi (Desset, 1966)

A new species of heligmosomoid nematode belonging to the subfamily Nippostrongylinae Durette-Desset, 1970 is described: Heligmonina wakelini n. sp., a parasite from the small intestine of the commensal rodent Mastomys natalensis (Smith, 1834) from Swaziland. It differs from the most closely related species H. boomkeri Durette-Desset & Digiani, 2005 by the number of the cuticular ridges in the female synlophe (10 vs 12), the width of the left ala, larger than the body diameter in the male, and the inclination of the axis of orientation of the ridges in both sexes (53° vs 70°). New morphological data (head and synlophe) on Heligmonina chabaudi (Desset, 1964), also a parasite of Mastomys natalensis in the Republic of Congo, are provided in order to compare with the new species.Facultad de Ciencias Naturales y Muse