endemic to a single nation
Regularity: Regularly occurring
Type of Residency: Year-round
Global Range: (200,000-2,500,000 square km (about 80,000-1,000,000 square miles)) Range includes the Gulf Slope, from Galveston Bay drainage, Texas, east to Choctawhatchee River system, Florida, and middle Chattahoochee River drainage, Georgia; Mississippi River basin from the Gulf to southeastern Kansas (Holcroft 2004), central Missouri, southern Illinois, western Kentucky, and eastern Tennessee (Page and Burr 2011).
- Page, L.M. and B.M. Burr 1991 A field guide to freshwater fishes of North America north of Mexico. Houghton Mifflin Company, Boston. 432 p. (Ref. 5723)
Length: 10 cm
Catalog Number: USNM 3502
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Collector(s): A. Whipple
Locality: Sugar Loaf Creek, Arkansas, Arkansas, United States, North America
Habitat and Ecology
Habitat Type: Freshwater
Comments: This species occurs near the surface in quiet or flowing, relatively clear, sand-gravel bottom headwaters, creeks, and small rivers; often occurs along margins near thick stands of emergent vegetation (Lee et al. 1980, Page and Burr 2011).
Depth range (m): 0.155 - 1.005
Depth range (m): 0.155 - 1.005
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.
Non-Migrant: No. All populations of this species make significant seasonal migrations.
Locally Migrant: No. No populations of this species make local extended movements (generally less than 200 km) at particular times of the year (e.g., to breeding or wintering grounds, to hibernation sites).
Locally Migrant: No. No populations of this species make annual migrations of over 200 km.
Comments: Eats various arthropods and algae (Smith 1979).
Number of Occurrences
Note: For many non-migratory species, occurrences are roughly equivalent to populations.
Estimated Number of Occurrences: 81 - 300
Comments: This species is represented by a large number of occurrences (subpopulations).
100,000 to >1,000,000 individuals
Comments: Total adult population size is unknown but large. This species is common in most of its range.
Molecular Biology and Genetics
Barcode data: Fundulus olivaceus
Below is a sequence of the barcode region Cytochrome oxidase subunit 1 (COI or COX1) from a member of the species.
See the BOLD taxonomy browser for more complete information about this specimen and other sequences.
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Download FASTA File
Statistics of barcoding coverage: Fundulus olivaceus
Public Records: 11
Specimens with Barcodes: 13
Species With Barcodes: 1
IUCN Red List Assessment
Red List Category
Red List Criteria
National NatureServe Conservation Status
Rounded National Status Rank: N5 - Secure
NatureServe Conservation Status
Rounded Global Status Rank: G5 - Secure
Total adult population size is unknown but large. This species is common in most of its range.
Trend over the past 10 years or three generations is uncertain but likely relatively stable.
Global Short Term Trend: Relatively stable (=10% change)
Comments: Trend over the past 10 years or three generations is uncertain but likely relatively stable.
Comments: No major threats are known.
Relevance to Humans and Ecosystems
Names and Taxonomy
Comments: Allozyme data indicate that F. EURYZONUS and F. OLIVACEUS are sister species (Cashner et al. 1992). Exhibits a high degree of genetic variation both within and among populations. The genus FUNDULUS was removed from Atheriniformes:Cyprinodontidae and placed in Cyprinodontiformes:Fundulidae by Parenti (1981); pending confirmation based on other character suites, this change was not accepted in the 1991 AFS checklist (Robins et al. 1991). See Wiley (1986) for a study of the evolutionary relationships of FUNDULUS topminnows based on morphological characters. See Cashner et al. (1992) for an allozyme-based phylogenetic analysis of the genus FUNDULUS.