''Algansea'' 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
ray-finned fish
Actinopterygii (; ), members of which are known as ray-finned fish or actinopterygians, is a class of bony fish that comprise over 50% of living vertebrate species. They are so called because of their lightly built fins made of webbings of sk ...
in the family
Leuciscidae
Leuciscidae is a family of freshwater ray-finned fishes, formerly classified as a subfamily of the Cyprinidae, which contains the true minnows.
Members of the Old World (OW) clade of minnows within this subfamily are known as European minnow ...
, distributed in the
Lerma–
Chapala–
Grande de Santiago,
Pátzcuaro,
Armería,
Ameca,
Ayutla and
Tuxpan basins in west-central
Mexico
Mexico, officially the United Mexican States, is a country in North America. It is the northernmost country in Latin America, and borders the United States to the north, and Guatemala and Belize to the southeast; while having maritime boundar ...
(mostly
Jalisco
Jalisco, officially the Free and Sovereign State of Jalisco, is one of the 31 states which, along with Mexico City, comprise the 32 Political divisions of Mexico, Federal Entities of Mexico. It is located in western Mexico and is bordered by s ...
, but also surrounding states and the
State of Mexico
The State of Mexico, officially just Mexico, is one of the 32 federal entities of the United Mexican States. Colloquially known as Edomex (from , the abbreviation of , and ), to distinguish it from the name of the whole country, it is the mo ...
).
The genus includes both species that are locally numerous,
and species that are highly
threatened
A threatened species is any species (including animals, plants and fungi) which is vulnerable to extinction in the near future. Species that are threatened are sometimes characterised by the population dynamics measure of ''critical depensatio ...
.
[ Their closest relative is the longfin dace (''Agosia chrysogaster'').][
''Algansea'' are fairly small fish that typically are between in ]standard length
Fish measurement is the measuring of individual fish and various parts of fish anatomy, their anatomies, for data used in many areas of ichthyology, including Taxonomy (biology), taxonomy and fishery biology.
Overall length
Standard length (SL) is ...
, although ''A. lacustris'' and ''A. popoche'' can reach up to .[ The different species are generally quite similar in their appearance, being yellowish- or ]olive
The olive, botanical name ''Olea europaea'' ("European olive"), is a species of Subtropics, subtropical evergreen tree in the Family (biology), family Oleaceae. Originating in Anatolia, Asia Minor, it is abundant throughout the Mediterranean ...
-brown overall; darker on the upperparts and paler, more silvery on the underparts. They have a long blackish line along the side of the body from the gill cover
The operculum is a series of bones found in bony fish and Chimaera, chimaeras that serves as a facial support structure and a protective covering for the gills; it is also used for respiration and feeding.
Anatomy
The opercular series contain ...
s to the tail base, or a blackish spot at the base of the tail.[
]
Species
There are currently eight recognized species in this genus:Algansea popoche
The popoche chub (''Algansea popoche'') is a species of freshwater fish in the family Leuciscidae, the shiners, daces and minnows. It is Endemism, endemic to the Lake Chapala and nearby sections of associated rivers in Jalisco of west-central Mexi ...
'' ( D. S. Jordan & Snyder, 1899) (popoche chub)
* '' Algansea tincella'' (Valenciennes
Valenciennes (, also , , ; ; or ; ) is a communes of France, commune in the Nord (French department), Nord Departments of France, department, Hauts-de-France, France.
It lies on the Scheldt () river. Although the city and region experienced ...
, 1844) (spottail chub)
References
Pogonichthyinae
Taxa named by Charles Frédéric Girard
{{Leuciscinae-stub