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Dionda episcopa

Baird, 1857

Roundnose Minnow

G4Apparently Secure Found in 1 roadless area NatureServe Explorer →
G4Apparently SecureGlobal Rank
Least concernIUCN
Identity
Unique IDELEMENT_GLOBAL.2.102051
Element CodeAFCJB09020
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVertebrate Animal
IUCNLeast concern
Endemicoccurs (regularly, as a native taxon) in multiple nations
KingdomAnimalia
PhylumCraniata
ClassActinopterygii
OrderCypriniformes
FamilyLeuciscidae
GenusDionda
Concept Reference
Robins, C.R., R.M. Bailey, C.E. Bond, J.R. Brooker, E.A. Lachner, R.N. Lea, and W.B. Scott. 1991. Common and scientific names of fishes from the United States and Canada. American Fisheries Society, Special Publication 20. 183 pp.
Taxonomic Comments
DIONDA ARGENTOSA, D. SERENA, D. MELANOPS, DIONDA SP 1, and undescribed DIONDA from the Rio Conchos, Mexico, formerly were included in D. EPISCOPA (Mayden et al. 1992). Gold et al. (1992) documented chromosomal and genome size data for D. DIABOLI and all other DIONDA in Texas and New Mexico and found no significant differences in chromosomes and very little divergence in genome size; they concluded that the taxonomic status of nominal DIONDA species warrants further investigation. See Mayden et al. (1992) for additional information on speciation in the genus DIONDA.
Conservation Status
Rank MethodExpertise without calculation
Review Date2011-11-28
Change Date2011-11-28
Edition Date2011-11-28
Edition AuthorsHammerson, G.
Range Extent20,000-200,000 square km (about 8000-80,000 square miles)
Number of Occurrences21 - 80
Range Extent Comments
Range includes the Rio Grande and its tributaries (especially the Pecos River system) upstream of the Devils River in Texas, New Mexico, and Coahuila, Mexico (Sublette et al. 1990, Mayden et al. 1992, Miller 2005, Page and Burr 2011). Sublette et al. (1990) mapped only one historical locality in the Rio Grande in New Mexico. Carson et al. (2010) determined that the Dionda population in Independence Creek of the lower Pecos River basin represents D. argentosa rather than D. episcopa; possibly D. episcopa is limited in Texas to the Pecos River upstream of the confluence with Independence Creek; further study is needed to determine the downstream limit of this species (Hanna 2011).
Occurrences Comments
This species is represented by a fairly large number of occurrences (subpopulations).
Threat Impact Comments
Threats in Mexico include present or threatened destruction, modification, or reduction of habitat or range; other natural or anthropogenic factors that affect a taxon's existence, including impacts of nonindigenous organisms, hybridization, competition, and/or predation; and a narrowly restricted range (Jelks et al. 2008).
Ecology & Habitat

Habitat

Habitat includes rocky pools (sometimes runs) of headwaters, creeks, and small rivers, where it often occurs among filamentous algae (Page and Burr 2011); this species often is abundant in shallow vegetated pools of clear, low gradient rivers and creeks. It has spawned in seep springs. Eggs sink and lodge in gravel.

Reproduction

Spawns in spring at about 17-18 C; eggs nonadhesive and demersal.
Other Nations (1)
United StatesN4
ProvinceRankNative
New MexicoS3Yes
TexasS1Yes
Threat Assessments
ThreatScopeSeverityTiming
7 - Natural system modifications———
7.2 - Dams & water management/use———
8 - Invasive & other problematic species, genes & diseases———
8.1 - Invasive non-native/alien species/diseases———

—

Roadless Areas (1)
New Mexico (1)
AreaForestAcres
Last Chance CanyonLincoln National Forest8,934
References (14)
  1. Carson, E. W., A. H. Hanna, G. P. Garrett, J. R. Gibson, and J. R. Gold. 2010. Conservation genetics of cyprinid fishes (genus <i>Dionda</i>) in southwestern North America. II. Expansion of the known range of the manantial roundnose minnow, <i>Dionda argentosa</i>. Southwestern Naturalist 55:576-581.
  2. Gold, J.R., Y. Li, M.C. Birkner, and J.D. Jenkin. 1992. Chromosomal NOR karyotypes and genome sizes in <i>Dionda</i> (Osteichthyes: Cyprinidae) from Texas and New Mexico. Southwestern Naturalist 37:217-222.
  3. Hanna, A. H. 2011. Conservation genetics of five species of Dionda in west Texas. M.S. thesis, Texas A & M University.
  4. Lee, D. S., C. R. Gilbert, C. H. Hocutt, R. E. Jenkins, D. E. McAllister, and J. R. Stauffer, Jr. 1980. Atlas of North American freshwater fishes. North Carolina State Museum of Natural History, Raleigh, North Carolina. i-x + 854 pp.
  5. Mayden, R. L., R. M. Matson, and D. M. Hillis. 1992. Speciation in the North American genus <i>Dionda</i> (Teleostei: Cypriniformes). Pages 710-746 in R.L. Mayden, editor. Systematics, historical ecology, and North American freshwater fishes. Stanford University Press, Stanford, California. xxvi + 969 pp.
  6. Miller, R. R. (with the collaboration of W. L. Minckley and S. M. Norris). 2005 [actually published in 2006]. Freshwater fishes of Mexico. University of Chicago Press, Chicago, Illinois. 490 pp.
  7. Nelson, J. S., E. J. Crossman, H. Espinosa-Perez, L. T. Findley, C. R. Gilbert, R. N. Lea, and J. D. Williams. 2004. Common and scientific names of fishes from the United States, Canada, and Mexico. American Fisheries Society, Special Publication 29, Bethesda, Maryland. 386 pp.
  8. Page, L. M., and B. M. Burr. 1991. A field guide to freshwater fishes: North America north of Mexico. Houghton Mifflin Company, Boston, Massachusetts. 432 pp.
  9. Page, L. M., and B. M. Burr. 2011. Peterson field guide to freshwater fishes of North America north of Mexico. Second edition. Houghton Mifflin Harcourt, Boston. xix + 663 pp.
  10. Page, L. M., H. Espinosa-Pérez, L. T. Findley, C. R. Gilbert, R. N. Lea, N. E. Mandrak, R. L. Mayden, and J. S. Nelson. 2013. Common and scientific names of fishes from the United States, Canada, and Mexico. Seventh edition. American Fisheries Society, Special Publication 34, Bethesda, Maryland.
  11. Page, L. M., K. E. Bemis, T. E. Dowling, H.S. Espinosa-Pérez, L.T. Findley, C. R. Gilbert, K. E. Hartel, R. N. Lea, N. E. Mandrak, M. A. Neigbors, J. J. Schmitter-Soto, and H. J. Walker, Jr. 2023. Common and scientific names of fishes from the United States, Canada, and Mexico. Eighth edition. American Fisheries Society (AFS), Special Publication 37, Bethesda, Maryland, 439 pp.
  12. Propst, David. L. 2000. Review and annotation of fish watershed distribution maps. Review requested by Anthony E. Zammit, ABI. Endangered Species Biologist. New Mexico Department of Game and Fish, Santa Fe, NM. March 2000.
  13. Robins, C.R., R.M. Bailey, C.E. Bond, J.R. Brooker, E.A. Lachner, R.N. Lea, and W.B. Scott. 1991. Common and scientific names of fishes from the United States and Canada. American Fisheries Society, Special Publication 20. 183 pp.
  14. Sublette, J. E., M. D Hatch, and M. Sublette. 1990. The fishes of New Mexico. University New Mexico Press, Albuquerque, New Mexico. 393 pp.