''Sirodotia'' Kylin (1912) is a genus of freshwater
red alga
Red algae, or Rhodophyta (, ; ), make up one of the oldest groups of eukaryotic algae. The Rhodophyta comprises one of the largest Phylum, phyla of algae, containing over 7,000 recognized species within over 900 Genus, genera amidst ongoing taxon ...
in the
Batrachospermaceae
Batrachospermaceae is a family of freshwater red algae (Rhodophyta), a group of reddish plants found in rivers and streams. These algae have a distinct life cycle called the "''Lemanea''-type," starting with small reproductive cells known as carpos ...
family, found in temperate and tropical waters. It was first described by
Kylin in 1912.
Etymology
The genus name of ''Sirodotia'' is in honour of Simon Sirodot (1825–1903), who was a French
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
algologist. He was also a
zoologist
Zoology ( , ) is the scientific study of animals. Its studies include the structure, embryology, classification, habits, and distribution of all animals, both living and extinct, and how they interact with their ecosystems. Zoology is one ...
and
archaeologist
Archaeology or archeology is the study of human activity through the recovery and analysis of material culture. The archaeological record consists of Artifact (archaeology), artifacts, architecture, biofact (archaeology), biofacts or ecofacts, ...
, who taught at schools in Toulouse, Strasbourg, Le Mans, Cahors and Limoges.
Taxonomy
''Sirodotia'' was first described by
Kylin in 1912. The order
Batrachospermales
Batrachospermales is an order of red algae
Red algae, or Rhodophyta (, ; ), make up one of the oldest groups of eukaryotic algae. The Rhodophyta comprises one of the largest Phylum, phyla of algae, containing over 7,000 recognized species with ...
currently has six genera—''Sirodotia,'' ''
Batrachospermum
''Batrachospermum'' is a genus of red algae from the family ''Batrachospermaceae''. Due to its complex biological life cycle, descriptions of the taxon typically focus on gametophytes, while sporophytes, i.e., carposporophytes, are filamentous st ...
'', ''
Kumanoa
''Kumanoa'' is a genus of Florideophyte red algae belonging to the family Batrachospermaceae.
The genus has cosmopolitan distribution.
Species
There are several species, including:
*''Kumanoa abilii''
*''Kumanoa amazonensis''
*''Kumanoa am ...
'', ''
Nothocladus'', ''
Tuomeya'', and ''
Sheathia''. The morphology of the
gametophyte
A gametophyte () is one of the two alternating multicellular phases in the life cycles of plants and algae. It is a haploid multicellular organism that develops from a haploid spore that has one set of chromosomes. The gametophyte is the se ...
of ''Batrachospermum'', ''Sirodotia'', ''Tuomeya'', and ''Nothocladus'' are more are less similar to each other. In 1990, Necchi and
Entwisle Entwisle is a surname. Notable people with the surname include:
* Gertrude Lilian Entwisle (1892–1961), British electrical engineer
* Edmund Entwisle (1660–1707), English clergyman
* Joseph Entwisle (1767–1841), English Methodist minister
* ...
proposed to delimit them and raise ''Batrachospermum'' from genus level to section level.
Phylogenetic
In biology, phylogenetics () is the study of the evolutionary history of life using observable characteristics of organisms (or genes), which is known as phylogenetic inference. It infers the relationship among organisms based on empirical dat ...
studies have further supported the separation of these groups at the genus level.
Description
Attached, gelatinous
gametophytic
A gametophyte () is one of the two alternating multicellular phases in the life cycles of plants and algae. It is a haploid multicellular organism that develops from a haploid spore that has one set of chromosomes. The gametophyte is the sex ...
filaments, up to 17 cm long, with a beaded appearance varying from blue-green to yellow-green.