Resumos
Trata a presente nota do aparecimento de um exemplar de Ceratium furca encontrado no plancton do litoral paulista, provido de um terceiro prolongamento suplementar, ao lado da placa antapical direita. O autor examina alguns casos de variações constatadas no mesmo gênero e regista o fato ocorrido no material proveniente do litoral paulista.
The Marine Fauna Section of the Instituto Paulista de Oceanografia (São Paulo Oceanographie Institute), has undertaken regular plankton researches along the coastal waters of São Paulo State (Brasil), as an index of their productivity. After examining 297 superficial plankton samples from different areas and seasons, the author found a specimen of Ceratium that was considered very close to Ceratium furca Dujardin var. báltica (Fig. 1). whose occurrence called his attention due to the fact of having on its right side a third supplementary appendix longer than that of the characteristic plate of both species Ceratium hirundinella and macroceros. Up to now, isolated individuals were observed with pre or post-cingular plates which exhibit a variable thikness. Frequently, were found somewhat strong deviations on the right or on the left side of the soecimen examined. Regarding the extra appendix considered here to be a specific variation, the author thinks that nothing definite can be said at present since only one such individual was caught. In the other hand he thinks that this specific variation is worthwhile noticing.
Nota sôbre variação específica em Ceratium furca Dujardin, do plancton do litoral paulista
João de Azevedo Souza
SUMÁRIO
Trata a presente nota do aparecimento de um exemplar de Ceratium furca encontrado no plancton do litoral paulista, provido de um terceiro prolongamento suplementar, ao lado da placa antapical direita.
O autor examina alguns casos de variações constatadas no mesmo gênero e regista o fato ocorrido no material proveniente do litoral paulista.
ABSTRACT
The Marine Fauna Section of the Instituto Paulista de Oceanografia (São Paulo Oceanographie Institute), has undertaken regular plankton researches along the coastal waters of São Paulo State (Brasil), as an index of their productivity.
After examining 297 superficial plankton samples from different areas and seasons, the author found a specimen of Ceratium that was considered very close to Ceratium furca Dujardin var. báltica (Fig. 1). whose occurrence called his attention due to the fact of having on its right side a third supplementary appendix longer than that of the characteristic plate of both species Ceratium hirundinella and macroceros.
Up to now, isolated individuals were observed with pre or post-cingular plates which exhibit a variable thikness. Frequently, were found somewhat strong deviations on the right or on the left side of the soecimen examined.
Regarding the extra appendix considered here to be a specific variation, the author thinks that nothing definite can be said at present since only one such individual was caught. In the other hand he thinks that this specific variation is worthwhile noticing.
Texto completo disponível apenas em PDF.
Full text available only in PDF format.
BIBLIOGRAFIA
- ALLEN, W. E., 1941 - Twenty year's statistical studies of marine plankton. Dinoflagellates of southern California. Amer. Midd. Nat., vol. 26, n.ş 3, p. 603-635. Indiana.
- CARTER, G. S., 1940 - A General Zoology of Invertebrates, XXVIII + 509 p. 172 figs. N. York.
- KOFOID, C. A., 1907 Dinoflagellata of the San Diego Region. III Description of new species. Univ. Cal. Publ. Zoology, XVII, vol. 3, n.ş 13, p. 299-340, pl. 22-23. Berkeley.
- ______ 1908 - Exuviation, autotomy and regeneration in Ceratium. Univ. Cal. Publ. Zoology, vol. 4, n.ş 6, p. 345-386. Berkeley.
- KUDO, R. R., 1931 - Handbook of Protozoology, VII + 451 p. fig. 1-175. Springfield - Baltimore.
- REICHENOW, E., 1929 - Lehrbuch der Protozoenkunde, VIII + 1262 p. Jena.
- SCHUTT , P., 1895 - Die Peridineen der Plankton-Expedition. Ergebnisse der Plankton-Expedition der Humboldt Stiftung. I Theil, p. 1-170, taf. 1 27. Kiel und Leipzig.
- WESENBERG-LUND, C, 1937 - Ferskvandsfaunen Biologisk Belyst, vol. 2, p. 415-837. Copenhagen.
Datas de Publicação
-
Publicação nesta coleção
19 Jun 2012 -
Data do Fascículo
Dez 1950
