Laackmanniella
See Codonellopsis
- Laackmanniella naviculaefera (Laackmann, 1909) (ref. ID; 3544)
Syn; Laackmanniella naviculaefera Kofoid & Campbell, 1929 (ref. ID; 3544); Laackmanniella prolongata Kofoid & Campbell, 1929 (ref. ID; 3544); Leprotintinnus naviculaefera Laackmann, 1909 (ref. ID; 3544); Leprotintinnus prolongatus Laackmann, 1909 (ref. ID; 3544); Leprotintinnus prolongatus f. ventricosa Laackmann, 1909 (ref. ID; 3544)
Synonym
Laackmanniella naviculaefera Kofoid & Campbell, 1929 (ref. ID; 3544); Laackmanniella prolongata Kofoid & Campbell, 1929 (ref. ID; 3544); Leprotintinnus naviculaefera Laackmann, 1909 (ref. ID; 3544); Leprotintinnus prolongatus Laackmann, 1909 (ref. ID; 3544); Leprotintinnus prolongatus f. ventricosa Laackmann, 1909 (ref. ID; 3544)
Descriptions
The lorica of the species of Laackmanniella peculiar to the antarctic seas is distinguishable from that of the allied forms of Codonellopsis in having a distinct aboral opening at the distal end of the bowl. The tubular lorica of the single known species of the genus consists of a cylindrical hyaline collar and of a slightly inflated bowl tapering gradually to a truncated aboral end. Foreign particles attached to the surface of the bowl are more or less coarse. (ref. ID; 3544)
Comments
The two forms originally named by Laackmann (1907) as naviculaefera and prolongatus, are included in the present species. The lorica of the former is shorter and is more or less inflated in the bowl with diatoms attached to the surface as foreign particules, and that of the latter is longer and tubular without adhering diatoms, but it is difficult to make distinction between them only by the length of the lorica and the presence of adhering diatoms. At present, Hada places the two forms in a single species following Balech's opinion. (ref. ID; 3544)
Measurements
Length 150; length of a collar 80; oral diameter 34; aboral opening 12 um. (ref. ID; 3544)