Salt-marsh
Guides
Spartidelphax
Spartidelphax is a genus of planthoppers in the family Delphacidae, established in 2014 to accommodate species associated with cordgrass (Spartina) in coastal salt marsh habitats. The genus was erected following taxonomic revision of the Delphacodes group, recognizing distinct morphological and ecological characteristics that separate it from related genera. Members are small, brachypterous or macropterous insects with the characteristic enlarged hind femora and movable spur on the hind tibia typical of delphacid planthoppers.
Spartidelphax detectus
Spartidelphax detectus is a species of planthopper in the family Delphacidae, first described by Van Duzee in 1897. It belongs to a genus associated with spartina grasses in coastal salt marsh habitats. The species has been recorded from multiple states along the Atlantic and Gulf coasts of the United States.
Sphaeroma
pillbug, roly poly, marine pillbug
Sphaeroma is a genus of aquatic isopod crustaceans in the family Sphaeromatidae. These small crustaceans are commonly known as marine pillbugs or roly polies, though they are distinct from terrestrial isopods. The genus contains multiple species distributed across marine and estuarine environments globally. Some species, such as S. terebrans, are specialized wood-borers in mangrove habitats, while others inhabit rocky intertidal zones or construct burrows in soft sediments. The genus has been subject to recent taxonomic revision, with new species described from the northeastern Pacific and elsewhere.
Tabanus conterminus
Tabanus conterminus is a species of horse fly in the family Tabanidae, originally described by Walker in 1850. The species is associated with salt marsh habitats in eastern coastal North America. It has been subject to taxonomic revision, with a lectotype designated to clarify its nomenclatural status relative to other coastal horse flies such as Tabanus nigrovittatus.
Tabanus nigrovittatus
greenhead horse fly, salt marsh greenhead, greenhead fly, greenhead, greenfly
Tabanus nigrovittatus, commonly known as the greenhead horse fly or salt marsh greenhead, is a biting horse fly species endemic to coastal salt marshes of the eastern United States. Adult females are aggressive blood-feeders that require vertebrate blood for egg production, while males do not feed on blood. The species is smaller than most horse flies, approximately the size of a house fly. Larvae develop in intertidal salt marsh mud for one to two years, preying on other invertebrates. Adults emerge in late spring and are most active from late June through August. The species is a significant human and animal pest, with populations managed through black box traps rather than insecticides due to ecological concerns.
Tetracha floridana
Florida metallic tiger beetle, Florida big-headed tiger beetle
Tetracha floridana is a Florida endemic tiger beetle restricted to coastal salt marsh and mudflat habitats along the Gulf coast from Dixie County to the Florida Keys. Adults are strictly nocturnal and exhibit the characteristic metallic green to dark green elytra and enlarged head of the genus. The species was elevated from subspecies status in 2007 based on distinct morphological characters. Larvae inhabit burrows in dry ground adjacent to coastal marshes and can be distinguished from related genera by simple, thorn-like hooks on the fifth abdominal segment.
Trichocorixa
water boatmen
Trichocorixa is a genus of water boatmen in the family Corixidae comprising approximately 14 described species. Members of this genus are notable for their exceptional tolerance of saline and hypersaline habitats, ranging from brackish coastal marshes to salt ponds with salinities exceeding 150‰. Several species have become invasive outside their native ranges, with documented ecological impacts through predation on brine shrimp and other zooplankton. The genus exhibits complex life history adaptations including staggered egg hatching, salinity-dependent embryonic development, and overwintering strategies that vary among species and populations.
Trichocorixa reticulata
water boatman
Trichocorixa reticulata is a water boatman (family Corixidae) inhabiting saline and hypersaline aquatic environments. The species exhibits exceptional osmotic tolerance, surviving salinities from freshwater to full seawater (~3.5%). Populations show synchronized annual breeding cycles with peak reproduction in May-July. Females are larger than males, and eggs are deposited on solid substrates including algae and pool surfaces. Both adults and nymphs function as predators and scavengers.
Trichocorixa verticalis
water boatman
Trichocorixa verticalis is a small water boatman (Corixidae) native to North America and the Caribbean, now established as an invasive species in Europe, Morocco, South Africa, and New Caledonia. It is exceptionally euryhaline, inhabiting brackish waters, saline ponds, coastal wetlands, and open marine environments—unusual for a corixid. The species overwinters as diapausing eggs and has demonstrated significant ecological impacts in invaded habitats, including dominance over native corixids and trophic cascades affecting phytoplankton abundance through predation on zooplankton.
Tumidagena
Tumidagena is a genus of small, flightless delphacid planthoppers comprising at least three described species. The best-studied species, T. minuta, is a specialist herbivore of the salt marsh grass Spartina patens in eastern North America. Despite being predominantly flightless (>99% of adults), populations exhibit high gene flow and weak genetic differentiation over distances exceeding 400 km, suggesting mechanisms other than adult flight maintain connectivity.
Uca minax
red-jointed fiddler crab, brackish-water fiddler crab
Minuca minax is a fiddler crab species distinguished by its tolerance for low-salinity and freshwater habitats, extending farther inland than most congeners. Males possess one greatly enlarged claw with red joints, the source of its common name. Formerly classified in genus Uca, it was transferred to Minuca in 2016. The species is abundant in salt marshes and tidal streams along the U.S. Atlantic and Gulf coasts, with documented populations occurring more than 50 km from the sea.
Uca pugnax
Atlantic marsh fiddler crab, mud fiddler crab, Atlantic mud fiddler crab, marsh fiddler crab
Minuca pugnax is a small intertidal crab native to Atlantic coast salt marshes of North America. Males possess one dramatically enlarged yellow claw used for signaling and combat, while females have two small claws. The species exhibits sexual dimorphism in body size and coloration. It constructs burrows in muddy substrates and has been observed in both low-marsh and, more recently, high-marsh habitats. Larval development includes five zoeal stages and one megalopal stage before settlement.
Uhlorchestia
beach hoppers
Uhlorchestia is a genus of talitrid amphipods endemic to salt marshes along the Atlantic coast of North America. The genus contains two described species: U. spartinophila and U. uhleri. These amphipods are closely associated with smooth cordgrass (Spartina alterniflora) and function as detritivores in salt marsh ecosystems. Population studies indicate high turnover rates and year-round reproduction with seasonal peaks.