Lanceola (crustacean)
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''Lanceola'' is a
genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...
of
green algae The green algae (: green alga) are a group of chlorophyll-containing autotrophic eukaryotes consisting of the phylum Prasinodermophyta and its unnamed sister group that contains the Chlorophyta and Charophyta/ Streptophyta. The land plants ...
in the family
Characiaceae Characiaceae is a family of green algae in the order Sphaeropleales. It contains epiphytic or planktonic algae that are unicellular or colonial. The cells are heteropolar, with basal and apical ends having different shapes. The daughter cells are ...
, containing a single species, ''Lanceola spatulifera''. It is found in freshwater habitats. ''Lanceola'' consists of free-floating, single cells. The cell is narrowly spindle-shaped (fusiform), tapered into a narrow spine at one end, and at the other end a lanceolate appendage. The
cell wall A cell wall is a structural layer that surrounds some Cell type, cell types, found immediately outside the cell membrane. It can be tough, flexible, and sometimes rigid. Primarily, it provides the cell with structural support, shape, protection, ...
is smooth. Cells contain a single parietal
chloroplast A chloroplast () is a type of membrane-bound organelle, organelle known as a plastid that conducts photosynthesis mostly in plant cell, plant and algae, algal cells. Chloroplasts have a high concentration of chlorophyll pigments which captur ...
with a
pyrenoid Pyrenoids are sub-cellular phase-separated micro-compartments found in chloroplasts of many algae,Giordano, M., Beardall, J., & Raven, J. A. (2005). CO2 concentrating mechanisms in algae: mechanisms, environmental modulation, and evolution. ''An ...
, and a central
nucleus Nucleus (: nuclei) is a Latin word for the seed inside a fruit. It most often refers to: *Atomic nucleus, the very dense central region of an atom *Cell nucleus, a central organelle of a eukaryotic cell, containing most of the cell's DNA Nucleu ...
. It reproduces by forming
zoospore A zoospore is a motile asexual spore that uses a flagellum for locomotion in aqueous or moist environments. Also called a swarm spore, these spores are created by some protists, bacteria, and fungi to propagate themselves. Certain zoospores are ...
s with two
flagella A flagellum (; : flagella) (Latin for 'whip' or 'scourge') is a hair-like appendage that protrudes from certain plant and animal sperm cells, from fungal spores ( zoospores), and from a wide range of microorganisms to provide motility. Many pr ...
. The genus was created by
František Hindák František () is a masculine Czech and Slovak given name. It is a cognate In historical linguistics, cognates or lexical cognates are sets of words that have been inherited in direct descent from an etymological ancestor in a common pare ...
for the leaf-like appendage on one end of the cell. However, it has been rejected by other taxonomists, because the structure appears typical of the appendages found in the genus ''
Ankyra ''Ankyra'' is a genus of green algae in the family Characiaceae. This genus of algae is closely related to '' Atractomorpha'' and ''Sphaeroplea''. They are found in stagnant waters. ''Ankyra'' consists of single cells that are planktonic or epi ...
''.


References

Sphaeropleales genera Sphaeropleales Monotypic algae genera Freshwater algae {{Chlorophyceae-stub