Southern sand darter

The southern sand darter (Ammocrypta meridiana) is a species of freshwater ray-finned fish, a darter from the subfamily Etheostomatinae, part of the family Percidae, which also contains the perches, ruffes and pikeperches. It is found in the rivers draining into Mobile Bay in the southeastern United States where it inhabits sandy sections of flowing waters from streams to large rivers.

Southern sand darter
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Perciformes
Family: Percidae
Genus: Ammocrypta
Species:
A. meridiana
Binomial name
Ammocrypta meridiana
J. D. Williams, 1975
Synonyms[2]
  • Etheostoma meridiana (Williams, 1975)

Description

The Southern sand darter is a close relative of the Eastern sand darter (A. pellucida) and of the scaly sand darter (A. vivax). It can be told apart from the scaly sand darter by the lack of any dark bands on the dorsal, anal or caudal fins, that the blotches along the lateral line are lengthened horizontally and that there are no tubercles on the anal fin when breeding. It is more completely covered in scales than the Eastern sand darter, the tip of its snout is usually coloured.[3] This species can reach a length of 7.1 cm (2.8 in), though most are only about 7 cm (2.8 in) in length.[2]

Distribution

The Southern sand darter is found in the rivers draining into Mobile Bay in Alabama and Mississippi. It occurs throughout the Alabama River system, the Tombigbee River, the Black Warrior River, the Cahaba River and the Tallapoosa River.[4]

Habitat and biology

The southern sand darter occur in moderate to large streams and rivers which have clean sandy beds and a moderate current. They are found in water with depths which range from 15 to 150 centimetres (5.9 to 59.1 in). They appear to spawn from early June up to late July. They feed on invertebrates.[4]

Taxonomy

The Southern sand darter was first formally described in 1975 by the American biologist James D. Williams with the type locality given as Cedar Creek on Alabama State Route 41 near Sardis, Alabama.[5] This species forms a clade within the genus Ammocrypta with the scaly sand darter and the eastern sand darter.[3]

References
  1. NatureServe (2013). "Ammocrypta meridiana". IUCN Red List of Threatened Species. 2013: e.T202429A2744706. doi:10.2305/IUCN.UK.2013-1.RLTS.T202429A2744706.en. Retrieved 20 September 2020.
  2. Froese, Rainer and Pauly, Daniel, eds. (2019). "Ammocrypta meridiana" in FishBase. December 2019 version.
  3. James D. Williams (1975). "Systematics of the Percid Fishes of the Subgenus Ammocrypta, Genus Ammocrypta, with Descriptions of Two New Species". Bulletin of the Alabama Museum of Natural History (1): 1–56.
  4. "Ammocrypta meridiana Southern Sand Darter". NatureServe Explorer. NatureServe. Retrieved 20 September 2020.
  5. Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Ammocrypta meridiana". Catalog of Fishes. California Academy of Sciences. Retrieved 20 September 2020.
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