Fundulus dispar
Starhead topminnow

Key Characteristics

This killifish has a prominent black teardrop below and towards back of eye. The dorsal fin has 7-8 rays and its origin is behind the anal fin.

Status and Rank

  • State Status: SC
  • State Rank: S1
  • Global Rank: G4

Occurrences

County NameNumber of OccurrencesYear Last Observed
Barry11954
Berrien11976
Branch61999
Cass11995
Hillsdale21996
Distribution map for Fundulus dispar

Updated 7/21/2017. Information is summarized from MNFI's database of rare species and community occurrences. Data may not reflect true distribution since much of the state has not been thoroughly surveyed.

Habitat

Starhead topminnows occur in quiet vegetated waters.

Specific Habitat Needs

Macrophytes needed in Inland Lake, Littoral, Midwater Soft substrates and abundant macrophytes needed in Mainstem Stream (3rd-4th order), Pool, Mainstem Stream (3rd-4th order), Run

Natural Community Types

Methodology

For each species, lists of natural communities were derived from review of the nearly 6,500 element occurrences in the MNFI database, in addition to herbarium label data for some taxa. In most cases, at least one specimen record exists for each listed natural community. For certain taxa, especially poorly collected or extirpated species of prairie and savanna habitats, natural community lists were derived from inferences from collection sites and habitat preferences in immediately adjacent states (particularly Indiana and Illinois). Natural communities are not listed for those species documented only from altered or ruderal habitats in Michigan, especially for taxa that occur in a variety of habitats outside of the state.

Natural communities are not listed in order of frequency of occurrence, but are rather derived from the full set of natural communities, organized by Ecological Group. In many cases, the general habitat descriptions should provide greater clarity and direction to the surveyor. In future versions of the Rare Species Explorer, we hope to incorporate natural community fidelity ranks for each taxon.

Management

This species is found in slow, heavily vegetated waters therefore flow alterations, dredging, and channelization are all threats to this species. Herbicides and manual removal of aquatic vegetation should be limited or not done at all to help protect this species habitat. Michigan is the edge of the starhead topminnows range.

Active Period

Spawning from first week of June to fourth week of July

Survey Methods

Page Citation

Michigan Natural Features Inventory. 2007. Rare Species Explorer (Web Application). Available online at http://mnfi.anr.msu.edu/explorer [Accessed Sep 20, 2017]

References

Survey References

Technical References

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