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...

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Autores principales:	Esnal, G.B., Capitanio, F.L., Simone, L.C.
Formato:	JOUR
Materias:	intraspecific taxa taxonomy Appendicularia Fritillaria borealis Fritillaria borealis intermedia Fritillaria borealis sargassi Fritillaria borealis typica Tunicata
Acceso en línea:	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	todo:paper_00074977_v59_n3_p461_Esnal
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spelling	todo:paper_00074977_v59_n3_p461_Esnal2023-10-03T14:05:47Z Concerning intraspecific taxa in Fritillaria borealis Lohmann (Tunicata, Appendicularia) Esnal, G.B. Capitanio, F.L. Simone, L.C. 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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, G.B. Capitanio, F.L. Simone, L.C. 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.
format	JOUR
author	Esnal, G.B. Capitanio, F.L. Simone, L.C.
author_facet	Esnal, G.B. Capitanio, F.L. Simone, L.C.
author_sort	Esnal, G.B.
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)
url	http://hdl.handle.net/20.500.12110/paper_00074977_v59_n3_p461_Esnal
work_keys_str_mv	AT esnalgb concerningintraspecifictaxainfritillariaborealislohmanntunicataappendicularia AT capitaniofl concerningintraspecifictaxainfritillariaborealislohmanntunicataappendicularia AT simonelc concerningintraspecifictaxainfritillariaborealislohmanntunicataappendicularia
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Concerning intraspecific taxa in Fritillaria borealis Lohmann (Tunicata, Appendicularia)

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