''Dionda'' is the genus of desert
minnow
Minnow is the common name for a number of species of small freshwater fish, belonging to several genera of the families Cyprinidae and Leuciscidae. They are also known in Ireland as pinkeens.
Smaller fish in the subfamily Leusciscidae are co ...
s, small fish belonging to the family
Cyprinidae
Cyprinidae is a family of freshwater fish commonly called the carp or minnow family. It includes the carps, the true minnows, and relatives like the barbs and barbels. Cyprinidae is the largest and most diverse fish family and the largest verte ...
.
They are native to
fresh water
Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. Although the term specifically excludes seawater and brackish water, it does include ...
s in the United States and Mexico. Their range is centered in the
Rio Grande
The Rio Grande ( and ), known in Mexico as the Río Bravo del Norte or simply the Río Bravo, is one of the principal rivers (along with the Colorado River) in the southwestern United States and in northern Mexico.
The length of the Rio G ...
basin, but they also occur in associated systems, including
Nazas
Nazas is a city and seat of the municipality of Nazas, in the state of Durango, north-western Mexico. Instituto Nacional de Estadística y Geografía. Principales resultados por localidad 2005 (ITER). Retrieved on December 20, 2008 As of 2010, ...
–
Aguanaval of north–central Mexico, and
Nueces,
San Antonio
("Cradle of Freedom")
, image_map =
, mapsize = 220px
, map_caption = Interactive map of San Antonio
, subdivision_type = Country
, subdivision_name = United States
, subdivision_type1= U.S. state, State
, subdivision_name1 = Texas
, s ...
and
Colorado
Colorado (, other variants) is a state in the Mountain West subregion of the Western United States. It encompasses most of the Southern Rocky Mountains, as well as the northeastern portion of the Colorado Plateau and the western edge of t ...
of
Texas
Texas (, ; Spanish language, Spanish: ''Texas'', ''Tejas'') is a state in the South Central United States, South Central region of the United States. At 268,596 square miles (695,662 km2), and with more than 29.1 million residents in 2 ...
.
These are small fish, no more than long, and overall brownish-silvery with a distinct dark horizontal line from the head to the tail base.
[ They are believed to feed primarily on ]algae
Algae (; singular alga ) is an informal term for a large and diverse group of photosynthetic eukaryotic organisms. It is a polyphyletic grouping that includes species from multiple distinct clades. Included organisms range from unicellular mic ...
.
Species
There are currently six species in this genus.[ Additionally, the species now placed in '']Tampichthys
''Tampichthys'' is a genus of cyprinid fish endemic to east–central Mexico. They are entirely restricted to the Pánuco River basin, except ''T. ipni'' which also occurs in some other Mexican rivers that drain into the Gulf of Mexico.
These ar ...
'' were formerly included in ''Dionda'' instead.[
* '']Dionda argentosa
The Manantial roundnose minnow (''Dionda argentosa'') is a species of ray-finned fish in the family Cyprinidae.
It is endemic to the Devils River and San Felipe Creek in Texas.
It is threatened by habitat loss
Habitat destruction (also ...
'' Girard, 1856 (Manantial roundnose minnow)
* ''Dionda diaboli
The Devils River minnow (''Dionda diaboli'') is a species of ray-finned fish in the family Cyprinidae. The minnow coexists with other closely related species and other cyprinids in the range of northern Mexico and southern Texas.
Habitat
The min ...
'' C. Hubbs & W. H. Brown, 1957 (Devils River minnow)
* ''Dionda episcopa
The roundnose minnow (''Dionda episcopa'') is a species of ray-finned fish in the family Cyprinidae.
It is found in the Colorado, San Antonio, upper Nueces and Rio Grande drainages in Texas and New Mexico in the United States, and Mexico
...
'' Girard, 1856 (Roundnose minnow)
* ''Dionda melanops
The spotted minnow (''Dionda melanops'') is a species of ray-finned fish in the family Cyprinidae.
It is endemic to Mexico
Mexico (Spanish: México), officially the United Mexican States, is a country in the southern portion of North Amer ...
'' Girard, 1856 (Spotted minnow)
* ''Dionda nigrotaeniata
The Guadalupe roundnose minnow (''Dionda nigrotaeniata'') is a species of ray-finned fish in the family Cyprinidae.
It is found in the Colorado and San Antonio Rivers in Texas
Texas (, ; Spanish: ''Texas'', ''Tejas'') is a state in the ...
'' (Cope
The cope (known in Latin as ''pluviale'' 'rain coat' or ''cappa'' 'cape') is a liturgical vestment, more precisely a long mantle or cloak, open in front and fastened at the breast with a band or clasp. It may be of any liturgical colours, litu ...
, 1880) (Guadalupe roundnose minnow)
* ''Dionda serena
The Nueces roundnose minnow (''Dionda serena'') is a species of ray-finned fish in the family Cyprinidae.
It is endemic to the upper Nueces in Texas
Texas (, ; Spanish: ''Texas'', ''Tejas'') is a state in the South Central region of ...
'' Girard, 1856 (Nueces roundnose minnow)
References
*
{{Leuciscinae-stub