''Rosenvingiella'' 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
Prasiolaceae
Prasiolaceae is a family (biology), family of green algae in the order Prasiolales. Members of this family are found in freshwater, terrestrial, and marine habitats.
Algae in the family Prasiolaceae consist of thalli with blades a single cell th ...
. Members of this genus are found in marine (particularly
intertidal
The intertidal zone or foreshore is the area above water level at low tide and underwater at high tide; in other words, it is the part of the littoral zone within the tidal range. This area can include several types of habitats with various sp ...
) or terrestrial habitats.
[
The genus was first ]circumscribed In geometry, a circumscribed circle for a set of points is a circle passing through each of them. Such a circle is said to ''circumscribe'' the points or a polygon formed from them; such a polygon is said to be ''inscribed'' in the circle.
* Circum ...
by Janus Lauritz Andreas Kolderup Rosenvinge
Janus Lauritz Andreas Kolderup-Rosenvinge (10 May 1792 – 4 August 1850) was a Danish jurist and a leading historian of Danish law. He taught at the University of Copenhagen
The University of Copenhagen (, KU) is a public university, publi ...
, generally cited as Lauritz Kolderup Rosenvinge (1858–1939), who was a Danish botanist
Botany, also called plant science, is the branch of natural science and biology studying plants, especially Plant anatomy, their anatomy, Plant taxonomy, taxonomy, and Plant ecology, ecology. A botanist or plant scientist is a scientist who s ...
and phycologist. Rosenvinge named the genus ''Gayella'', but this was junior homonym
In biology, a homonym is a name for a taxon that is identical in spelling to another such name, that belongs to a different taxon.
The rule in the International Code of Zoological Nomenclature is that the first such name to be published is the s ...
of ''Gayella'' Pierre (a flowering plant in the family Sapotaceae
240px, '' Madhuca longifolia'' var. ''latifolia'' in Narsapur, Medak district, India
The Sapotaceae are a family of flowering plants belonging to the order (biology)">order Ericales">family (biology)">family of flowering plants belonging to th ...
). Therefore, the genus was renamed to ''Rosenvingiella'' by Paul Claude Silva in 1957, honoring its original author.
Description
''Rosenvingiella'' consists of uniseriate (one cell wide) filaments of cells, later becoming multiseriate and pseudoparenchymatous
This glossary of mycology is a list of definitions of terms and concepts relevant to mycology, the study of fungi. Terms in common with other fields, if repeated here, generally focus on their mycology-specific meaning. Related terms can be found ...
. The filaments are attached to a substrate via a unicellular rhizoid, either found singly or in pairs.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 single central 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 ...
. Asexual reproduction
Asexual reproduction is a type of reproduction that does not involve the fusion of gametes or change in the number of chromosomes. The offspring that arise by asexual reproduction from either unicellular or multicellular organisms inherit the f ...
occurs via the formation of nonmotile spores, while sexual reproduction
Sexual reproduction is a type of reproduction that involves a complex life cycle in which a gamete ( haploid reproductive cells, such as a sperm or egg cell) with a single set of chromosomes combines with another gamete to produce a zygote tha ...
is oogamous
Oogamy is a form of anisogamy where the gametes differ in both size and form.
In oogamy the large female gamete (also known as ovum) is immotile, while the small male gamete (also known as spermatozoon) is mobile. Oogamy is a common form of anis ...
and involves oogonia and male gametes 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 ...
.Prasiola
''Prasiola'' is a genus of macroscopic green algae, found in a variety of habitats ranging from terrestrial, freshwater, to marine. The genus has a cosmopolitan distribution, ranging from the Arctic to the Antarctic.
Plants belonging to the genu ...
'', and has often been considered a synonym of the latter. Molecular phylogenetic
Molecular phylogenetics () is the branch of phylogeny that analyzes genetic, hereditary molecular differences, predominantly in DNA sequences, to gain information on an organism's evolutionary relationships. From these analyses, it is possible to ...
analyses have shown the two genera to be separate: they can be distinguished by morphological characters of the gametangia and rhizoids.[ The genus '' Rosenvingiellopsis'' was also separated from ''Rosenvingiella'' based on molecular data.]
Species
As accepted by WoRMS
The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive catalogue and list of names of marine organisms.
Content
The content of the registry is edited and maintained by scien ...
;
References
Trebouxiophyceae genera
Prasiolales
{{green algae-stub