Concerning intraspecific taxa in Fritillaria borealis Lohmann (Tunicata, Appendicularia)

Presently only three intraspecific formae are recognized in Fritillaria borealis Lohmann, 1896: typica, intermedia and sargassi, but the characterization of intermedia is imprecise. We re-examine the problem of intraspecific variability in this species on the basis of a morphological study on specim...

Descripción completa

Detalles Bibliográficos
Autores principales:	Esnal, Graciela Beatriz, Capitanio, Fabiana Lía
Publicado:	1996
Materias:	intraspecific taxa taxonomy Appendicularia Fritillaria borealis Fritillaria borealis intermedia Fritillaria borealis sargassi Fritillaria borealis typica Tunicata
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00074977_v59_n3_p461_Esnal http://hdl.handle.net/20.500.12110/paper_00074977_v59_n3_p461_Esnal
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_00074977_v59_n3_p461_Esnal
record_format	dspace
spelling	paper:paper_00074977_v59_n3_p461_Esnal2023-06-08T14:31:49Z Concerning intraspecific taxa in Fritillaria borealis Lohmann (Tunicata, Appendicularia) Esnal, Graciela Beatriz Capitanio, Fabiana Lía intraspecific taxa taxonomy Appendicularia Fritillaria borealis Fritillaria borealis intermedia Fritillaria borealis sargassi Fritillaria borealis typica Tunicata Presently only three intraspecific formae are recognized in Fritillaria borealis Lohmann, 1896: typica, intermedia and sargassi, but the characterization of intermedia is imprecise. We re-examine the problem of intraspecific variability in this species on the basis of a morphological study on specimens collected in an extensive area (between 78°29'S and 9°34'N, and between 117°01'E and 36°00'W). Clearly the relative position of the ovary and testis is a distinctive characteristic that separates two groups: A-with a symmetrical arrangement of the gonads and B-with an asymmetrical arrangement of the gonads. The variations observed in each of these groups can be ascribed to different growth and maturation stages of the gonads. The possibility of considering these groups as intraspecific taxa is discussed and we suggest that a better choice is to treat them as separate species as classified by Lohmann (1896) with F. borealis occurring from pole to pole and F. sargassi inhabiting warm and cool waters. Fil:Esnal, G.B. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Capitanio, F.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1996 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00074977_v59_n3_p461_Esnal http://hdl.handle.net/20.500.12110/paper_00074977_v59_n3_p461_Esnal
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	intraspecific taxa taxonomy Appendicularia Fritillaria borealis Fritillaria borealis intermedia Fritillaria borealis sargassi Fritillaria borealis typica Tunicata
spellingShingle	intraspecific taxa taxonomy Appendicularia Fritillaria borealis Fritillaria borealis intermedia Fritillaria borealis sargassi Fritillaria borealis typica Tunicata Esnal, Graciela Beatriz Capitanio, Fabiana Lía Concerning intraspecific taxa in Fritillaria borealis Lohmann (Tunicata, Appendicularia)
topic_facet	intraspecific taxa taxonomy Appendicularia Fritillaria borealis Fritillaria borealis intermedia Fritillaria borealis sargassi Fritillaria borealis typica Tunicata
description	Presently only three intraspecific formae are recognized in Fritillaria borealis Lohmann, 1896: typica, intermedia and sargassi, but the characterization of intermedia is imprecise. We re-examine the problem of intraspecific variability in this species on the basis of a morphological study on specimens collected in an extensive area (between 78°29'S and 9°34'N, and between 117°01'E and 36°00'W). Clearly the relative position of the ovary and testis is a distinctive characteristic that separates two groups: A-with a symmetrical arrangement of the gonads and B-with an asymmetrical arrangement of the gonads. The variations observed in each of these groups can be ascribed to different growth and maturation stages of the gonads. The possibility of considering these groups as intraspecific taxa is discussed and we suggest that a better choice is to treat them as separate species as classified by Lohmann (1896) with F. borealis occurring from pole to pole and F. sargassi inhabiting warm and cool waters.
author	Esnal, Graciela Beatriz Capitanio, Fabiana Lía
author_facet	Esnal, Graciela Beatriz Capitanio, Fabiana Lía
author_sort	Esnal, Graciela Beatriz
title	Concerning intraspecific taxa in Fritillaria borealis Lohmann (Tunicata, Appendicularia)
title_short	Concerning intraspecific taxa in Fritillaria borealis Lohmann (Tunicata, Appendicularia)
title_full	Concerning intraspecific taxa in Fritillaria borealis Lohmann (Tunicata, Appendicularia)
title_fullStr	Concerning intraspecific taxa in Fritillaria borealis Lohmann (Tunicata, Appendicularia)
title_full_unstemmed	Concerning intraspecific taxa in Fritillaria borealis Lohmann (Tunicata, Appendicularia)
title_sort	concerning intraspecific taxa in fritillaria borealis lohmann (tunicata, appendicularia)
publishDate	1996
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00074977_v59_n3_p461_Esnal http://hdl.handle.net/20.500.12110/paper_00074977_v59_n3_p461_Esnal
work_keys_str_mv	AT esnalgracielabeatriz concerningintraspecifictaxainfritillariaborealislohmanntunicataappendicularia AT capitaniofabianalia concerningintraspecifictaxainfritillariaborealislohmanntunicataappendicularia
_version_	1768545123716562944

Concerning intraspecific taxa in Fritillaria borealis Lohmann (Tunicata, Appendicularia)

Ejemplares similares