Taxonomic Descriptions of One New Species and Redescription of Four Species in the Family Strombidiidae (Ciliophora, Oligotrichida)¹

Abstract

Five ciliate species collected from the Woods Hole area were examined by protargol silver impregnation and scanning electron microscopy. These ciliates have been shown to sequester and use chloroplasts obtained from flagellate prey. One new species, Strombidium chlorophilum, is described. Four other species, Strombidium capitatum (Leegaard, 1915) Kahl, 1932, Strombidium conicum (Lohmann, 1908) Wulff, 1919, Strombidium acutum (Leegaard, 1915) Kahl, 1932, and Laboea strobila Lohmann, 1908, are redescribed. Characters used in describing the Strombidiidae include cell size and shape, anterior and ventral polykinetids, macronuclear shape and size, the kinetid “girdle,” the ventral kinety, the trichites, and the paroral kinety. The rationale for using these characters as taxonomic criteria is discussed.

Planktonic ciliates Choreotrichida and Strombidiida from the inner zone of Bahía Blanca Estuary, Argentina

“…Taxonomical remarks. Cellular features of S. capitatum from Puerto Cuatreros are similar to those described by MONTAGNES et al (1988). Leegaard, 1915 (Figs.…”

“…They are commonly found in other coastal areas of the world MONTAGNES et al, 1988;LYNN & GILRON, 1993;LEAKEY et al, 1994;PETZ et al, 1995;SONG & BRADBURY, 1998). Some differences in cell size and in numbers of several structures from Puerto Cuatreros populations were observed.…”

“…Some differences in cell size and in numbers of several structures from Puerto Cuatreros populations were observed. MONTAGNES et al (1988) have demonstrated that spirotrichs show marked size variation in response to environmental influences and regulate numbers of structures in proportion to cell size.…”

Planktonic ciliates in the oligotrophic Eastern Mediterranean:vertical, spatial distribution and mixotrophy

“…Oligotrich and choreotrich ciliates were identified down to genus or species level where possible, following Maeda & Carey (1985), Maeda (1986), Laval-Peuto & Rassoulzadegan (1988), Lynn et al (1988Lynn et al ( , 1991a, Montagnes et al (1988Montagnes et al ( , 1990, and Montagnes & Taylor (1994). Tintinnids were identified under phase-contrast microscope, based on the lorica shape and dimensions, after Jorgensen (1924) and Balech (1959).…”

Co-occurrence of Dinophysis tripos and pectenotoxins in Argentinean shelf waters

“…The latter were identified to the low taxonomic possible level and enumerated following the Utermö hl method (Utermö hl, 1931) using appropriate literature (Boltovskoy, 1981;Balech, 1988;Montagnes et al, 1988;Montagnes & Lynn, 1991;Montagnes & Taylor, 1994;Agatha & Riedel-Lorje, 1997;Alder, 1999;Petz, 1999;Kogan, 2005). Each sample was well homogenized and 10 mL allowed settling for 24 h. After that, all organisms in the base chamber were identified and counted under a Nikon Eclipse TS100 inverted microscope.…”