Euglena Chadefaudii, une nouvelle espèce d'Euglène viridoïde

PHYLOGENY AND SYSTEMATICS OF EUGLENA (EUGLENACEAE) SPECIES WITH AXIAL, STELLATE CHLOROPLASTS BASED ON MORPHOLOGICAL AND MOLECULAR DATA—NEW TAXA, EMENDED DIAGNOSES, AND EPITYPIFICATIONS1

“…We made a similar decision regarding two species of Monomorphina-M. pyrum and M. pseudopyrum (Kosmala et al 2007b). All available descriptions show large diversification of E. chadefaudii populations, regarding its cell size: [54-67 · 15-18 lm (Gojdics 1953), 64-85 · 16.8-19.6 lm (Zakryś andWalne 1994), 65-90 · 18-24 lm (Kato 1982), 87-112 · 19-21 lm (Bourrelly 1951), 40-112 · 12-21 lm (Tell and Conforti 1986)]. We therefore took into account data from the literature in our diagnostic description, even though our own strains were smaller than those observed by Bourrelly and others.…”

“… Morphological and molecular studies, as well as original literature reexamination, necessitate establishment of five Euglena species with a single axial, stellate chloroplast [ Euglena viridis (O. F. Müller) Ehrenberg 1830, Euglena pseudoviridis Chadefaud 1937, Euglena stellata Mainx 1926, Euglena pseudostellata sp. nov., and Euglena cantabrica Pringsheim 1956], three species with two chloroplasts ( Euglena geniculata Dujardin ex Schmitz 1884, Euglena chadefaudii Bourrelly 1951, and Euglena pseudochadefaudii sp. nov.), and one species with three chloroplasts ( Euglena tristella Chu 1946).…”

“…One of the main criteria, so far, for distinguishing species with axial, stellate chloroplasts has been their number (from one to three). Based on this criterion, three groups of species had been described: (1) species with one chloroplast, located anterior the nucleus ( E. viridis Ehrenberg 1830, E. stellata Mainx 1926, E. pseudoviridis Chadefaud 1939, E. cantabrica Pringsheim 1956 , E. cuneata Pringsheim 1956, and E. archaeoviridis Zakryś et Walne 1994); (2) species with two chloroplasts, one located anterior and the other located posterior to the nucleus [ E. geniculata (Dujardin) Schmitz 1884 , E. chadefaudii Bourrelly 1951 and E. dicentra Skuja 1948]; and (3) species with three chloroplasts ( E. tristella Chu 1946).…”

“…Taxa with two chloroplasts: Four species have been described so far: E. geniculata (Dujardin) Schmitz 1884, E. dicentra Skuja 1948, E. chadefaudii Bourrelly 1951, and E. myxocylindracea Bold and MacEntee1973. The last one has been recently recognized as a synonym of E. geniculata (Zakryś et al.…”