The caudal bursa in the Heligmonellidae (Nematoda: Trichostrongylina): Characterization and hypothesis on its evolution

The different patterns of the caudal bursa of the Heligmonellidae (Nematoda) are redefined, taking into account the grouping of rays 2-6 and the sequence of origin of these rays from their common trunk. The type of symmetry of the caudal bursa is also redefined. The following patterns were observed...

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Detalles Bibliográficos
Autores principales:	Durette Desset, M. C., Digiani, María Celina
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2012
Materias:	Zoología Bursal pattern Bursal symmetry Evolution Heligmonellidae Nematoda
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/95379 https://ri.conicet.gov.ar/11336/80427 https://www.parasite-journal.org/articles/parasite/abs/2012/01/parasite2012191p3/parasite2012191p3.html
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-95379
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Zoología Bursal pattern Bursal symmetry Evolution Heligmonellidae Nematoda
spellingShingle	Zoología Bursal pattern Bursal symmetry Evolution Heligmonellidae Nematoda Durette Desset, M. C. Digiani, María Celina The caudal bursa in the Heligmonellidae (Nematoda: Trichostrongylina): Characterization and hypothesis on its evolution
topic_facet	Zoología Bursal pattern Bursal symmetry Evolution Heligmonellidae Nematoda
description	The different patterns of the caudal bursa of the Heligmonellidae (Nematoda) are redefined, taking into account the grouping of rays 2-6 and the sequence of origin of these rays from their common trunk. The type of symmetry of the caudal bursa is also redefined. The following patterns were observed and characterized: the basic patterns: types 2-3, 2-2-1, 1-3-1 and 1-4 and the intermediary patterns: type 2-3 tending to type 2-2-1, type 2-2-1 tending to type 1-3-1, type 1-3-1 tending to type 1-4 and type 2-2-1 tending to type 1-4. An evolutionary interpretation of the patterns is attempted and seems to follow the direction: 2-3 to 2-2-1 to 1-3-1 to 1-4. Seven atypical patterns are described. The caudal bursae were classified based on their symmetry: subsymmetrical, dissymmetrical and asymmetrical. Independently of the type of symmetry, the two latero-ventral lobes may have the same or different patterns. The type of symmetry, the ratio between the two latero-ventral lobes and a characteristic pattern were utilized to characterize the caudal bursae at the level of the genus and the subfamily. The combination of the right/left ratio and the type of symmetry gives heterogeneous results, with no real association between these characters. The most conspicuous asymmetries and dissymmetries were found among the Nippostrongylinae. The most frequent pattern in the Heligmonellidae is the basic type 2-2-1; types 1-3-1 and 1-4 are less frequent but are characteristic of several genera; type 1-4 is absent from the Heligmonellinae. Whatever the pattern, in the Heligmonellidae rays 4 and 5 are the last to diverge from the common trunk of rays 2-6.
format	Articulo Articulo
author	Durette Desset, M. C. Digiani, María Celina
author_facet	Durette Desset, M. C. Digiani, María Celina
author_sort	Durette Desset, M. C.
title	The caudal bursa in the Heligmonellidae (Nematoda: Trichostrongylina): Characterization and hypothesis on its evolution
title_short	The caudal bursa in the Heligmonellidae (Nematoda: Trichostrongylina): Characterization and hypothesis on its evolution
title_full	The caudal bursa in the Heligmonellidae (Nematoda: Trichostrongylina): Characterization and hypothesis on its evolution
title_fullStr	The caudal bursa in the Heligmonellidae (Nematoda: Trichostrongylina): Characterization and hypothesis on its evolution
title_full_unstemmed	The caudal bursa in the Heligmonellidae (Nematoda: Trichostrongylina): Characterization and hypothesis on its evolution
title_sort	caudal bursa in the heligmonellidae (nematoda: trichostrongylina): characterization and hypothesis on its evolution
publishDate	2012
url	http://sedici.unlp.edu.ar/handle/10915/95379 https://ri.conicet.gov.ar/11336/80427 https://www.parasite-journal.org/articles/parasite/abs/2012/01/parasite2012191p3/parasite2012191p3.html
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The caudal bursa in the Heligmonellidae (Nematoda: Trichostrongylina): Characterization and hypothesis on its evolution

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