Stolon development and some aspects of musculature in the characterization of Ihlea racovitzai (van Beneden, 1913) and Ihlea magalhanica (Apstein, 1894) (Tunicata, Thaliacea)

A new contribution to the characterization of the salps Ihlea racovitzai and I. magalhanica, particularly their reproductive features, is presented. In both species two oocytes develop in the aggregate form, in the solitary form stolon growth is continuous. Buds grow continuously from the zone of de...

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Autores principales:	Esnal, Graciela Beatriz, Daponte, María Cristina
Publicado:	1990
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07224060_v10_n4_p265_Esnal http://hdl.handle.net/20.500.12110/paper_07224060_v10_n4_p265_Esnal
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_07224060_v10_n4_p265_Esnal
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spelling	paper:paper_07224060_v10_n4_p265_Esnal2023-06-08T15:43:23Z Stolon development and some aspects of musculature in the characterization of Ihlea racovitzai (van Beneden, 1913) and Ihlea magalhanica (Apstein, 1894) (Tunicata, Thaliacea) Esnal, Graciela Beatriz Daponte, María Cristina A new contribution to the characterization of the salps Ihlea racovitzai and I. magalhanica, particularly their reproductive features, is presented. In both species two oocytes develop in the aggregate form, in the solitary form stolon growth is continuous. Buds grow continuously from the zone of deployment to the distal region without forming blocks or intermediate pieces. In Ihlea racovitzai the exit of the stolon and the resulting release of buds occurs later than in I. magalhanica. In the latter it takes place at the beginning of the strobilation of the stolon, which means an earlier and perhaps more continuous release of buds. The opening for the release of the buds is ventral and anterior to the nucleus in I. magalhanica and ventrolateral and posterior to the nucleus in I. racovitzai. Differences in the pattern of body muscle VII and the atrial retractors in the solitary forms are underlined. © 1990 Springer-Verlag. Fil:Esnal, G.B. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Daponte, M.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1990 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07224060_v10_n4_p265_Esnal http://hdl.handle.net/20.500.12110/paper_07224060_v10_n4_p265_Esnal
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description	A new contribution to the characterization of the salps Ihlea racovitzai and I. magalhanica, particularly their reproductive features, is presented. In both species two oocytes develop in the aggregate form, in the solitary form stolon growth is continuous. Buds grow continuously from the zone of deployment to the distal region without forming blocks or intermediate pieces. In Ihlea racovitzai the exit of the stolon and the resulting release of buds occurs later than in I. magalhanica. In the latter it takes place at the beginning of the strobilation of the stolon, which means an earlier and perhaps more continuous release of buds. The opening for the release of the buds is ventral and anterior to the nucleus in I. magalhanica and ventrolateral and posterior to the nucleus in I. racovitzai. Differences in the pattern of body muscle VII and the atrial retractors in the solitary forms are underlined. © 1990 Springer-Verlag.
author	Esnal, Graciela Beatriz Daponte, María Cristina
spellingShingle	Esnal, Graciela Beatriz Daponte, María Cristina Stolon development and some aspects of musculature in the characterization of Ihlea racovitzai (van Beneden, 1913) and Ihlea magalhanica (Apstein, 1894) (Tunicata, Thaliacea)
author_facet	Esnal, Graciela Beatriz Daponte, María Cristina
author_sort	Esnal, Graciela Beatriz
title	Stolon development and some aspects of musculature in the characterization of Ihlea racovitzai (van Beneden, 1913) and Ihlea magalhanica (Apstein, 1894) (Tunicata, Thaliacea)
title_short	Stolon development and some aspects of musculature in the characterization of Ihlea racovitzai (van Beneden, 1913) and Ihlea magalhanica (Apstein, 1894) (Tunicata, Thaliacea)
title_full	Stolon development and some aspects of musculature in the characterization of Ihlea racovitzai (van Beneden, 1913) and Ihlea magalhanica (Apstein, 1894) (Tunicata, Thaliacea)
title_fullStr	Stolon development and some aspects of musculature in the characterization of Ihlea racovitzai (van Beneden, 1913) and Ihlea magalhanica (Apstein, 1894) (Tunicata, Thaliacea)
title_full_unstemmed	Stolon development and some aspects of musculature in the characterization of Ihlea racovitzai (van Beneden, 1913) and Ihlea magalhanica (Apstein, 1894) (Tunicata, Thaliacea)
title_sort	stolon development and some aspects of musculature in the characterization of ihlea racovitzai (van beneden, 1913) and ihlea magalhanica (apstein, 1894) (tunicata, thaliacea)
publishDate	1990
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_07224060_v10_n4_p265_Esnal http://hdl.handle.net/20.500.12110/paper_07224060_v10_n4_p265_Esnal
work_keys_str_mv	AT esnalgracielabeatriz stolondevelopmentandsomeaspectsofmusculatureinthecharacterizationofihlearacovitzaivanbeneden1913andihleamagalhanicaapstein1894tunicatathaliacea AT dapontemariacristina stolondevelopmentandsomeaspectsofmusculatureinthecharacterizationofihlearacovitzaivanbeneden1913andihleamagalhanicaapstein1894tunicatathaliacea
_version_	1768543185187897344

Stolon development and some aspects of musculature in the characterization of Ihlea racovitzai (van Beneden, 1913) and Ihlea magalhanica (Apstein, 1894) (Tunicata, Thaliacea)

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